ULS-15/2-D48N-C - MURATA MANUFACTURING

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ULS 30-Watt Series

Sixteenth-brick DOSA-Compatible,

Isolated DC/DC Converters

MDC_ULS-30W_C04 Page 1 of 30

FEATURES

Small footprint DC/DC converter, ideal for

embedded applications

1.30" x 0.90" x 0.36" open frame package

Industry standard DOSA "brick" format

and pinout with surface mount option

2:1 Input Voltage Range (36V-75V, D48)

2250 Volt Basic input/output isolation

(48V models)

Up to 30 Watts total output power with

overtemperature shutdown

High efﬁ ciency synchronous rectiﬁ er forward

topology

Stable no-load operation with no required

external components

Operating temperature range -40 to +85°C

with derating

Certiﬁ ed to UL/EN/IEC 60950-1, CAN/CSA

C22.2 No. 60950-1, EN60950-1 safety

approvals, 2nd Edition

Extensive self-protection shut down features

The world of “brick” DC/DC converters has seen

a steady size reduction. The ULS series makes an-

other dramatic size shrink down to a “sixteenth-

brick” width (0.91 inches) while still retaining up

to 30Watt output and full 2250 Volt DC isolation.

The PC-board mount converter family accepts

36to 75 Volts DC inputs and delivers ﬁ xed outputs

regulated to within ±0.125%. The ULS converters

are ideal for datacom and telecom applications,

cell phone towers, data centers, server farms and

network repeaters.

ULS outputs may be trimmed within -20% to

+10% of nominal output while delivering fast set-

tling to current step loads and no adverse effects

from higher capacitive loads. Excellent ripple and

noise speciﬁ cations assure compatibility to circuits

using CPU’s, ASIC’s, programmable logic and

FPGA’s. No minimum load is required. For systems

requiring controlled startup/shutdown, an external

remote On/Off control may use a switch, transistor

or digital logic.

Many self-protection features on the ULS series

avoid both converter and external circuit hazards.

These include input undervoltage lockout and

overtemperature shutdown. The outputs current

limit using the “hiccup” autorestart technique and

the outputs may be short-circuited indeﬁ nitely.

Additional features include output overvoltage and

reverse conduction elimination.

The synchronous rectiﬁ er forward topology

yields high efﬁ ciency for minimal heat buildup and

“no fan” operation.

PRODUCT OVERVIEW

External

Power

Source

Reference and

Error Ampliﬁer

t4XJUDIJOH

t'JMUFST

t$VSSFOU4FOTF

-Vout (4)

+Vout (8)

Trim (6)

On/Off

Control

(2)

-Vin (3)

Open = On

$MPTFE0GG

+Vin (1)

1PTJUJWF

MPHJD

Controller

and Power

5SBOTGFS

*TPMBUJPO

Barrier

4FOTF

4FOTF

Typical topology is shown

Figure 1. Simpliﬁ ed Block Diagram

REG.-Nr. D216

Typical unitsTypical unit

*Sense is included on the ULS-3.3/8-D48 and ULS-5/6-D48 only.

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PART NUMBER STRUCTURE

*Special quantity order is required;

no sample quantities available.

ULS 30-Watt Series

Sixteenth-brick DOSA-Compatible,

Isolated DC/DC Converters

MDC_ULS-30W_C04 Page 2 of 30

PERFORMANCE SPECIFICATIONS SUMMARY AND ORDERING GUIDE M

Root Model M

Output Input Efficiency Case (inches)

VOUT

(V)

IOUT

(A, max.)

Power

(W)

R/N (mV pk-pk) Regulation (max.) ➂VIN Nom.

(V)

Range

(V)

IIN, no load

(mA)

IIN, full

load (A)

Typ. Max. Line Load Min. Typ.

ULS-3.3/8-D48 3.3 8 26.5 90 130 ±0.1% ±0.1% 48 36-75 75 0.58 89% 90% 1.30x0.90x0.36

ULS-5/6-D48 5 6 30 75 100 ±0.125% ±0.1% 48 36-75 20 0.69 89% 91% 1.30x0.90x0.36

ULS-12/2.5-D48 12 2.5 30 130 150 ±0.125% ±0.125% 48 36-75 25 0.71 86% 87.7% 1.30x0.90x0.36

ULS-15/2-D48 15 2 30 115 125 ±0.125% ±0.125% 48 36-75 25 0.70 87.5% 89% 1.30x0.90x0.36

Maximum Rated Output Current

Current in Amps

Sixteenth Brick Series

Nominal Output Voltage:

ULS -/D48-12 2.5 N

Note:

Some model number combinations

may not be available. Please contact

Murata Power Solutions.

Input Voltage Range:

D48 = 36-75 Volts (48V nominal)

On/Off Control Logic:

N = Negative

P = Positive

M Please refer to the Part Number Structure when ordering.

N All speciﬁ cations are typical at nominal line voltage and full load, +25°C unless otherwise noted. See

detailed speciﬁ cations. Output capacitors are 1 μF ceramic multilayer in parallel with 10 μF electrolytic.

I/O caps are necessary for our test equipment and may not be needed for your application.

O Regulation speciﬁ cations describe output voltage deviations from a nominal/midpoint value to either

extreme (50% load step).

RoHS Hazardous Substance Compliance

(does not claim EU RoHS exemption 7b–lead in solder)

C = RoHS-6

Pin Length Option (Thru-hole only)

Blank = Standard pin length 0.180˝ (4.6mm)

L1 = 0.110˝ (2.79mm)*

L2 = 0.145˝ (3.68mm)*

SMT Version (MSL Rating 2)

Blank = Through-hole mount, no SMT

M = Surface mount

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ULS 30-Watt Series

Sixteenth-brick DOSA-Compatible,

Isolated DC/DC Converters

MDC_ULS-30W_C04 Page 3 of 30

FUNCTIONAL SPECIFICATIONS, ULS-3.3/8-D48

ABSOLUTE MAXIMUM RATINGS Conditions ➀Minimum Typical/Nominal Maximum Units

Input Voltage, Continuous 0 80 Vdc

Input Voltage, Transient 100 mS max. duration 100 Vdc

Isolation Voltage Input to output, continuous 2250 Vdc

Input Reverse Polarity None, install external fuse None Vdc

On/Off Remote Control Power on, referred to -Vin 0 15 Vdc

Output Power 0 26.66 W

Output Current Current-limited, no damage, short-circuit

protected 08A

Storage Temperature Range Vin = Zero (no power) -55 125 °C

Absolute maximums are stress ratings. Exposure of devices to greater than any of these conditions may adversely affect long-term reliability. Proper operation under conditions other than those

listed in the Performance/Functional Speciﬁ cations Table is not implied or recommended.

INPUT Conditions ➀ ➂

Operating voltage range 36 48 75 Vdc

Recommended External Fuse Fast blow 1.5 A

Start-up threshold Rising input voltage 34 35.2 36 Vdc

Undervoltage shutdown Falling input voltage 32 34 35.2 Vdc

Turn-On/Turn-Off Hysteresis 1.5 Vdc

Overvoltage shutdown None Vdc

Reverse Polarity Protection None, install external fuse None Vdc

Internal Filter Type LC

Input current

Full Load Conditions Vin = nominal 0.58 0.63 A

Low Line Vin = minimum 0.77 0.83 A

Inrush Transient 0.05 A2-Sec.

Output in Short Circuit 50 100 mA

No Load Iout = minimum, unit = ON 75 100 mA

Shut-Down Input Current (Off, UV, OT) 12mA

Reﬂ ected (back) ripple current ➁Measured at input with speciﬁ ed ﬁ lter 30 mA, p-p

GENERAL and SAFETY

Efﬁ ciency Vin = 48V, full load 89 90 %

Vin = min., full load 89.5 90.5 %

Isolation

Isolation Voltage Input to output, continuous 2250 Vdc

Insulation Safety Rating basic

Isolation Resistance 10 M

Isolation Capacitance 1000 pF

Safety Certiﬁ ed to UL-60950-1, CSA-C22.2 No. 60950-1,

IEC/EN60950-1, 2nd edition Yes

Calculated MTBF Per Telcordia SR332, issue 1, class 3, ground

ﬁ xed, Tambient = +25°C 2 Hours x 106

DYNAMIC CHARACTERISTICS

Fixed Switching Frequency 320 350 380 KHz

Startup Time Power on to Vout regulated 50 mS

Startup Time Remote ON to Vout regulated 50 mS

Dynamic Load Response 50-75-50% load step, settling time to within

2% of Vout 100 150 µSec

Dynamic Load Peak Deviation same as above ±30 ±100 mV

FEATURES and OPTIONS

Remote On/Off Control ➄

“N” sufﬁ x:

Negative Logic, ON state ON = Ground pin or external voltage -0.7 1.2 V

Negative Logic, OFF state OFF = Pin open or external voltage 10 15 V

Control Current Open collector/drain 1 mA

“P” sufﬁ x:

Positive Logic, ON state ON = Pin open or external voltage 10 15 V

Positive Logic, OFF state OFF = Ground pin or external voltage -0.7 1.2 V

Control Current Open collector/drain 1 mA

SMT Mounting "M" sufﬁ x

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ULS 30-Watt Series

Sixteenth-brick DOSA-Compatible,

Isolated DC/DC Converters

MDC_ULS-30W_C04 Page 4 of 30

OUTPUT Conditions ➀Minimum Typical/Nominal Maximum Units

Total Output Power See Derating 2.61 25 26.66 W

Voltage

Nominal Output Voltage No trim 3.2674 3.3 3.333 Vdc

Setting Accuracy At 50% load, no trim -1 1 % of Vnom

Output Voltage Range User-adjustable -10 10 % of Vnom.

Overvoltage Protection Via magnetic feedback 4.2 5 5.7 Vdc

Current

Output Current Range 0.8 8 8 A

Minimum Load

Current Limit Inception 98% of Vnom., after warmup 8.5 10 11.3 A

Short Circuit

Short Circuit Current Hiccup technique, autorecovery within ±1.25%

of Vout 0.3 mA

Short Circuit Duration (remove short for

recovery) Output shorted to ground, no damage Continuous

Short circuit protection method Current limiting

Regulation ➅

Line Regulation Vin = min. to max., Vout = nom., Iout = nom. ±0.1 % of Vout

Load Regulation Iout = min. to max., Vin = 48V ±0.1 % of Vout

Ripple and Noise 5 Hz- 20 MHz BW 90 130 mV pk-pk

Temperature Coefﬁ cient At all outputs ±0.02 % of Vout./°C

Maximum Capacitive Loading Low ESR, resistive load only 2000 F

MECHANICAL (Through Hole Models) Conditions ➀ ➂

Outline Dimensions 1.30x0.90x0.36 Inches

(Please refer to outline drawing) LxWxH 33.02x22.86x9.144 mm

Weight 0.58 Ounces

16.4 Grams

Through Hole Pin Diameter 0.04 & 0.062 Inches

1.016 & 1.575 mm

Through Hole Pin Material Copper alloy

TH Pin Plating Metal and Thickness Nickel subplate 50 µ-inches

Gold overplate 5 µ-inches

ENVIRONMENTAL

Operating Ambient Temperature Range With Derating -40 85 °C

Operating Case Temperature Range No derating, full power, 200lfm, Vertical mount -40 70 °C

Storage Temperature Vin = Zero (no power) -55 125 °C

Thermal Protection/Shutdown Measured in center 110 115 120 °C

Electromagnetic Interference External ﬁ lter is required

Conducted, EN55022/CISPR22 B Class

Radiated, EN55022/CISPR22 B Class

Relative humidity, non-condensing To +85°C 10 90 %RH

Altitude must derate -1%/1000 feet -500 10,000 feet

-152 3048 meters

RoHS rating ➃RoHS-6

FUNCTIONAL SPECIFICATIONS, ULS-3.3/8-D48 (CONT.)

Performance Speciﬁ cation Notes

➀ Unless otherwise noted, all speciﬁ cations are typical at nominal input voltage, nominal output voltage

and full load. General conditions are +25° Celsius ambient temperature, near sea level altitude,

natural convection airﬂ ow. All models are tested and speciﬁ ed with external parallel 1 μF and 10 μF

multi-layer ceramic output capacitors. The external input capacitor is 22 μF ceramic. All capacitors

are low-ESR types wired close to the converter. These capacitors are necessary for our test equip-

ment and may not be needed in the user's application.

➁ Input (back) ripple current is tested and speciﬁ ed over 5 Hz to 20 MHz bandwidth. Input ﬁ ltering is

Cbus = 220 μF/100V, Cin = 33 μF/100V and Lbus = 12 μH.

➂ All models are stable and regulate to speciﬁ cation under no load.

➃ Reduction of Hazardous Substances (RoHS) compliance is to RoHS-6 (six substances restricted

including lead). See speciﬁ cations.

➄ The Remote On/Off Control is referred to -Vin.

➅ Regulation speciﬁ cations describe the output voltage changes as the line voltage or load current is

varied from its nominal or midpoint value to either extreme.

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ULS 30-Watt Series

Sixteenth-brick DOSA-Compatible,

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MDC_ULS-30W_C04 Page 5 of 30

TYPICAL PERFORMANCE CURVES, ULS-3.3/8-D48

Maximum Current Temperature Derating at Sea Level

(VIN = 36-75V, airﬂ ow is from pin 1 to pin 3)

Efﬁ ciency vs. Line Voltage and Load Current @ 25°C

0.00 0.81 1.61 2.41 3.21 4.01 4.81 5.61 6.41 7.21 8.01

VIN = 75V

VIN = 60V

VIN = 48V

VIN = 36V

Efﬁciency (%)

Load Current (Amps)

30 35 40 45 50 55 60 65 70 75 80 85

Output Current (Amps)

Ambient Temperature (ºC)

0.33 to 2.0 m/s (65 to 400 LFM)

INFRARED THERMAL IMAGE, ULS-3.3/8-D48

Thermal image with hot spot at full load current with 25°C ambient temperature. Natural convention is used with no forced airﬂ ow. Identiﬁ able and recommended maximum value

to be veriﬁ ed in application. Vin=48V, Q7 max temp=120°C/IPC9592 guidelines.

(+Vin) (+Vout)

(-Vin) (-Vout)

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ULS 30-Watt Series

Sixteenth-brick DOSA-Compatible,

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MDC_ULS-30W_C04 Page 6 of 30

OSCILLOGRAMS, ULS-3.3/8-D48

Startup Delay (Vin=48V, Vout=nom, Iout=8A, Cload= 1uF || 10 uF, Ta=+25°C,

ScopeBW=20Mhz) Trace 1= Vin, Trace3, Vout.

Startup Delay (Vin=48V, Vout=nom, Iout=8A, Cload= 1uF || 10 uF & 2000uF, Ta=+25°C,

ScopeBW=20Mhz) Trace 1= Vin, Trace3, Vout.

On/Off Enable Delay (Vin=36V, vout=nom, Iout=8A, Cload =1uF || 10uF, Ta=+25°C,

ScopeBW=20Mhz) Trace 1= Enable, Trace 3= Vout.

On/Off Enable Delay (Vin=75V, vout=nom, Iout=8A, Cload =1uF || 10uF, Ta=+25°C,

ScopeBW=20Mhz) Trace 1= Enable, Trace 3= Vout.

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ULS 30-Watt Series

Sixteenth-brick DOSA-Compatible,

Isolated DC/DC Converters

MDC_ULS-30W_C04 Page 7 of 30

OSCILLOGRAMS, ULS-3.3/8-D48

Output Ripple and Noise (Vin=48V, Vout=nom, Iout=8A, Cload= 1uF || 10uF, Ta=+25°C,

ScopeBW=20Mhz)

Step Load Transient Response (Vin=48V, Vout=nom, Iout=50-100-50% of full load,

Cload= 1uF || 10uF, Ta=+25°C, ScopeBW=20Mhz)

Step Load Transient Response (Vin=48V, Vout=nom, Iout=50-75-50% of full load,

Cload= 1uF || 10uF, Ta=+25°C, ScopeBW=20Mhz)

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ULS 30-Watt Series

Sixteenth-brick DOSA-Compatible,

Isolated DC/DC Converters

MDC_ULS-30W_C04 Page 8 of 30

FUNCTIONAL SPECIFICATIONS, ULS-5/6-D48

ABSOLUTE MAXIMUM RATINGS Conditions ➀Minimum Typical/Nominal Maximum Units

Input Voltage, Continuous 0 80 Vdc

Input Voltage, Transient 100 mS max. duration 100 Vdc

Isolation Voltage Input to output, continuous 2250 Vdc

Input Reverse Polarity None, install external fuse None Vdc

On/Off Remote Control Power on, referred to -Vin 0 15 Vdc

Output Power 0 30.3 W

Output Current Current-limited, no damage, short-circuit

protected 06A

Storage Temperature Range Vin = Zero (no power) -55 125 °C

Absolute maximums are stress ratings. Exposure of devices to greater than any of these conditions may adversely affect long-term reliability. Proper operation under conditions other than those

listed in the Performance/Functional Speciﬁ cations Table is not implied or recommended.

INPUT Conditions ➀ ➂

Operating voltage range 36 48 75 Vdc

Recommended External Fuse Fast blow 2 A

Start-up threshold Rising input voltage 32.5 35 35.9 Vdc

Undervoltage shutdown Falling input voltage 31 33.5 34 Vdc

Turn-On/Turn-Off Hysteresis 1.62 1.67 1.72 Vdc

Overvoltage shutdown None Vdc

Reverse Polarity Protection None, install external fuse None Vdc

Internal Filter Type LC

Input current

Full Load Conditions Vin = nominal 0.69 0.71 A

Low Line Vin = minimum 0.92 0.95 A

Inrush Transient 0.05 A2-Sec.

Output in Short Circuit 10 100 mA

No Load Iout = minimum, unit = ON 20 60 mA

Shut-Down Input Current (Off, UV, OT) 13mA

Reﬂ ected (back) ripple current ➁Measured at input with speciﬁ ed ﬁ lter 30 mA, p-p

GENERAL and SAFETY

Efﬁ ciency Vin = 48V, full load 89 91 %

Vin = min., full load 89 91 %

Isolation

Isolation Voltage Input to output, continuous 2250 Vdc

Insulation Safety Rating basic

Isolation Resistance 10 M

Isolation Capacitance 3300 pF

Safety Certiﬁ ed to UL-60950-1, CSA-C22.2 No. 60950-1,

IEC/EN60950-1, 2nd edition Yes

Calculated MTBF Per Telcordia SR332, issue 1, class 3, ground

ﬁ xed, Tambient = +25°C TBD Hours x 106

DYNAMIC CHARACTERISTICS

Fixed Switching Frequency 325 355 385 KHz

Startup Time Power on to Vout regulated 10 40 mS

Startup Time Remote ON to Vout regulated 10 40 mS

Dynamic Load Response 50-75-50% load step, settling time to within

1% of Vout 75 100 µSec

Dynamic Load Peak Deviation same as above ±150 mV

FEATURES and OPTIONS

Remote On/Off Control ➄

“N” sufﬁ x:

Negative Logic, ON state ON = Ground pin or external voltage -0.1 0.8 V

Negative Logic, OFF state OFF = Pin open or external voltage 2.5 15 V

Control Current Open collector/drain 1 mA

“P” sufﬁ x:

Positive Logic, ON state ON = Pin open or external voltage 10 15 V

Positive Logic, OFF state OFF = Ground pin or external voltage 0 0.7 V

Control Current Open collector/drain 1 mA

SMT Mounting “M” sufﬁ x

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ULS 30-Watt Series

Sixteenth-brick DOSA-Compatible,

Isolated DC/DC Converters

MDC_ULS-30W_C04 Page 9 of 30

OUTPUT Conditions ➀Minimum Typical/Nominal Maximum Units

Total Output Power 0 30 30.3 W

Voltage

Nominal Output Voltage No trim 4.95 5 5.05 Vdc

Setting Accuracy At 50% load, no trim -1 1 % of Vnom

Output Voltage Range User-adjustable -10 10 % of Vnom.

Overvoltage Protection Via magnetic feedback 6 6.5 7.2 Vdc

Current

Output Current Range 066A

Minimum Load

Current Limit Inception 98% of Vnom., after warmup 6.5 7.5 8.25 A

Short Circuit

Short Circuit Current Hiccup technique, autorecovery within ±1.25%

of Vout 0.3 A

Short Circuit Duration (remove short for

recovery) Output shorted to ground, no damage Continuous

Short circuit protection method Current limiting

Regulation ➅

Line Regulation Vin = min. to max., Vout = nom., Iout = nom. ±0.125 % of Vout

Load Regulation Iout = min. to max., Vin = 48V ±0.1 % of Vout

Ripple and Noise 5 Hz- 20 MHz BW 75 100 mV pk-pk

Temperature Coefﬁ cient At all outputs ±0.02 % of Vout./°C

Maximum Capacitive Loading Low ESR, resistive load only 2000 F

MECHANICAL (Through Hole Models) Conditions ➀ ➂

Outline Dimensions 1.30x0.90x0.36 Inches

(Please refer to outline drawing) LxWxH 33.02x22.86x9.144 mm

Weight 0.58 Ounces

16.4 Grams

Through Hole Pin Diameter 0.04 & 0.062 Inches

1.016 & 1.575 mm

Through Hole Pin Material Copper alloy

TH Pin Plating Metal and Thickness Nickel subplate 50 µ-inches

Gold overplate 5 µ-inches

ENVIRONMENTAL

Operating Ambient Temperature Range With Derating -40 85 °C

Operating Case Temperature Range No derating, full power, 200lfm, Vertical mount -40 70 °C

Storage Temperature Vin = Zero (no power) -55 125 °C

Thermal Protection/Shutdown Measured in center 110 115 120 °C

Electromagnetic Interference External ﬁ lter is required

Conducted, EN55022/CISPR22 B Class

Radiated, EN55022/CISPR22 B Class

RoHS rating ➃RoHS-6

FUNCTIONAL SPECIFICATIONS, ULS-5/6-D48 (CONT.)

Performance Speciﬁ cation Notes

➀ Unless otherwise noted, all speciﬁ cations are typical at nominal input voltage, nominal output voltage

and full load. General conditions are +25° Celsius ambient temperature, near sea level altitude,

natural convection airﬂ ow. All models are tested and speciﬁ ed with external parallel 1 μF and 10 μF

multi-layer ceramic output capacitors. The external input capacitor is 22 μF ceramic. All capacitors

are low-ESR types wired close to the converter. These capacitors are necessary for our test equip-

ment and may not be needed in the user's application.

➁ Input (back) ripple current is tested and speciﬁ ed over 5 Hz to 20 MHz bandwidth. Input ﬁ ltering is

Cbus = 220 μF/100V, Cin = 33 μF/100V and Lbus = 12 μH.

➂ All models are stable and regulate to speciﬁ cation under no load.

➃ Reduction of Hazardous Substances (RoHS) compliance is to RoHS-6 (six substances restricted

including lead). See speciﬁ cations.

➄ The Remote On/Off Control is referred to -Vin.

➅ Regulation speciﬁ cations describe the output voltage changes as the line voltage or load current is

varied from its nominal or midpoint value to either extreme.

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ULS 30-Watt Series

Sixteenth-brick DOSA-Compatible,

Isolated DC/DC Converters

MDC_ULS-30W_C04 Page 10 of 30

TYPICAL PERFORMANCE CURVES, ULS-5/6-D48

Current Limit

Efﬁ ciency vs. Line Voltage and Load Current @ 25°C

1.0 1.5 2.0 2.5 3.0 3.5 4.0 4.5 5.0 5.5 6.0

VIN = 75V

VIN = 60V

VIN = 48V

VIN = 36V

Efﬁciency (%)

Load Current (Amps)

0.5

1.5

2.5

3.5

4.5

5.5

7.0 7.2 7.4 7.6 7.8 8.0 8.2

VIN = 75V

VIN = 60V

VIN = 48V

VIN = 36V

Output Load Current (Amps)

INFRARED THERMAL IMAGE, ULS-5/6-D48

Thermal image with hot spot at half current with 25°C ambient temperature. Natural convention is used with no forced airﬂ ow. Identiﬁ able and recommended maximum value to

be veriﬁ ed in application. Vin=48V, Q7 max temp=120°C/IPC9592 guidelines.

47.9°C

91.5°C

Q 7: 82.9

R4: 8 0.1

R2 0 : 82 . 3

Q 6: 8 1 .3

T1: 78.1

(+Vin) (+Vout)

(-Vin) (-Vout)

Power Dissipation vs. Load Current @ 25°C

0.5

1.0

1.5

2.0

2.5

3.0

3.5

1.0 1.5 2.0 2.5 3.0 3.5 4.0 4.5 5.0 5.5 6.0

VIN = 75V

VIN = 60V

VIN = 48V

VIN = 36V

Loss (Watts)

Load Current (Amps)

Maximum Current Temperature Derating at Sea Level

(VIN = 36-75V, airﬂ ow is from pin 3 to pin 1)

30 35 40 45 50 55 60 65 70 75 80 85

0.33 to 2.0 m/s (65 to 400 LFM)

Output Current (Amps)

Ambient Temperature (ºC)

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ULS 30-Watt Series

Sixteenth-brick DOSA-Compatible,

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MDC_ULS-30W_C04 Page 11 of 30

OSCILLOGRAMS, ULS-5/6-D48

Startup Delay (Vin=48V, Iout=6A, Cload=2200uF, Ta=+25°C) Trace1=Vin, Trace4=Vout

On/Off Enable Delay (Vin=48V, Iout=6A, Cload=2000uF, Ta=+25°C)

Trace1=Enable, Trace4=Vout

On/Off Enable Delay (Vin=48V, Iout=6A, Cload=0, Ta=+25°C)

Trace1=Enable, Trace4=Vout

Startup Delay (Vin=48V, Iout=6A, Cload=0, Ta=+25°C) Trace1=Vin, Trace4=Vout.

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ULS 30-Watt Series

Sixteenth-brick DOSA-Compatible,

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MDC_ULS-30W_C04 Page 12 of 30

OSCILLOGRAMS, ULS-5/6-D48

Step Load Transient Response (Vin=48V, Iout=50-75-50% of Imax,

Cload= 1uf || 10uF, Ta=+25°C)

Output Ripple and Noise (Vin=48V, Iout=0A, Cload= 1uF || 10uf, Ta=+25°C) Output Ripple and Noise (Vin=48V, Iout=6A, Cload= 1uF || 10uf, Ta=+25°C)

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ULS 30-Watt Series

Sixteenth-brick DOSA-Compatible,

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MDC_ULS-30W_C04 Page 13 of 30

FUNCTIONAL SPECIFICATIONS, ULS-12/2.5-D48

ABSOLUTE MAXIMUM RATINGS Conditions ➀Minimum Typical/Nominal Maximum Units

Input Voltage, Continuous 0 80 Vdc

Input Voltage, Transient 100 mS max. duration 100 Vdc

Isolation Voltage Input to output, continuous 2250 Vdc

Input Reverse Polarity None, install external fuse None Vdc

On/Off Remote Control Power on, referred to -Vin 0 15 Vdc

Output Power 030W

Output Current Current-limited, no damage, short-circuit

protected 0 2.5 A

Storage Temperature Range Vin = Zero (no power) -55 125 °C

Absolute maximums are stress ratings. Exposure of devices to greater than any of these conditions may adversely affect long-term reliability. Proper operation under conditions other than those

listed in the Performance/Functional Speciﬁ cations Table is not implied or recommended.

INPUT Conditions ➀ ➂

Operating voltage range 36 48 75 Vdc

Recommended External Fuse Fast blow 2 A

Start-up threshold Rising input voltage 32.5 33.5 35.5 Vdc

Undervoltage shutdown Falling input voltage 31 32 33 Vdc

Turn-On/Turn-Off Hysteresis 1.40 1.46 1.52 Vdc

Overvoltage shutdown None Vdc

Reverse Polarity Protection None, install external fuse None Vdc

Internal Filter Type Capacitive

Input current

Full Load Conditions Vin = nominal 0.71 0.73 A

Low Line Vin = minimum 0.95 0.97 A

Inrush Transient 0.05 A2-Sec.

Output in Short Circuit 100 200 mA

No Load Iout = minimum, unit = ON 25 50 mA

Shut-Down Input Current (Off, UV, OT) 510mA

Reﬂ ected (back) ripple current ➁Measured at input with speciﬁ ed ﬁ lter 15 30 mA, p-p

GENERAL and SAFETY

Efﬁ ciency Vin = 48V, full load 86.0 87.7 %

Vin = min., full load 85.5 87.5 %

Isolation

Isolation Voltage Input to output, continuous 2250 Vdc

Insulation Safety Rating basic

Isolation Resistance 100 M

Isolation Capacitance 1600 pF

Safety Certiﬁ ed to UL-60950-1, CSA-C22.2 No. 60950-1,

IEC/EN60950-1, 2nd edition Yes

Calculated MTBF Per Telcordia SR332, issue 1, class 3, ground

ﬁ xed, Tambient = +25°C 3 Hours x 106

DYNAMIC CHARACTERISTICS

Fixed Switching Frequency 260 285 310 KHz

Startup Time Power on to Vout regulated 30 mS

Startup Time Remote ON to Vout regulated 30 mS

Dynamic Load Response 50-75-50% load step, settling time to within

1% of Vout 200 300 µSec

Dynamic Load Peak Deviation same as above ±250 ±300 mV

FEATURES and OPTIONS

Remote On/Off Control ➄

“N” sufﬁ x:

Negative Logic, ON state ON = Ground pin or external voltage -0.1 0.8 V

Negative Logic, OFF state OFF = Pin open or external voltage 2.5 15 V

Control Current Open collector/drain 1 2 mA

“P” sufﬁ x:

Positive Logic, ON state ON = Pin open or external voltage 10 15 V

Positive Logic, OFF state OFF = Ground pin or external voltage 0 0.7 V

Control Current Open collector/drain 1 2 mA

SMT Mounting "M" sufﬁ x

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ULS 30-Watt Series

Sixteenth-brick DOSA-Compatible,

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MDC_ULS-30W_C04 Page 14 of 30

OUTPUT Conditions ➀Minimum Typical/Nominal Maximum Units

Total Output Power See Derating 0 30 30 W

Voltage

Nominal Output Voltage No trim 11.88 12.00 12.12 Vdc

Setting Accuracy At 50% load, no trim -1 +1 % of Vnom

Output Voltage Range User-adjustable -20 +10 % of Vnom.

Overvoltage Protection Via magnetic feedback 13.3 15 18 Vdc

Current

Output Current Range 0.0 2.5 2.5 A

Minimum Load No minimum load

Current Limit Inception 98% of Vnom., after warmup 3.3 3.5 4.5 A

Short Circuit

Short Circuit Current Hiccup technique, autorecovery within ±1.25%

of Vout 40 mA

Short Circuit Duration (remove short for

recovery) Output shorted to ground, no damage Continuous

Short circuit protection method Current limiting

Regulation ➅

Line Regulation Vin = min. to max., Vout = nom., Iout = nom. ±0.125 % of Vout

Load Regulation Iout = min. to max., Vin = 48V ±0.125 % of Vout

Ripple and Noise 5 Hz- 20 MHz BW 130 150 mV pk-pk

Temperature Coefﬁ cient At all outputs ±0.02 % of Vout./°C

Maximum Capacitive Loading Low ESR, resistive load only 0 2200 F

MECHANICAL (Through Hole Models) Conditions ➀ ➂

Outline Dimensions 1.30x0.90x0.36 Inches

(Please refer to outline drawing) LxWxH 33.02x22.86x9.144 mm

Weight 0.58 Ounces

16.4 Grams

Through Hole Pin Diameter 0.04 & 0.062 Inches

1.016 & 1.575 mm

Through Hole Pin Material Copper alloy

TH Pin Plating Metal and Thickness Nickel subplate 50 µ-inches

Gold overplate 5 µ-inches

ENVIRONMENTAL

Operating Ambient Temperature Range With Derating -40 85 °C

Operating Case Temperature Range No derating, full power -40 105 °C

Storage Temperature Vin = Zero (no power) -55 125 °C

Thermal Protection/Shutdown Measured in center 115 125 130 °C

Electromagnetic Interference External ﬁ lter is required

Conducted, EN55022/CISPR22 B Class

Radiated, EN55022/CISPR22 B Class

Relative humidity, non-condensing To +85°C 10 90 %RH

Altitude must derate -1%/1000 feet -500 10,000 feet

-152 3048 meters

RoHS rating ➃RoHS-6

FUNCTIONAL SPECIFICATIONS, ULS-12/2.5-D48 (CONT.)

Performance Speciﬁ cation Notes

➀ Unless otherwise noted, all speciﬁ cations are typical at nominal input voltage, nominal output voltage

and full load. General conditions are +25° Celsius ambient temperature, near sea level altitude,

natural convection airﬂ ow. All models are tested and speciﬁ ed with external parallel 1 μF and 10 μF

multi-layer ceramic output capacitors. The external input capacitor is 22 μF ceramic. All capacitors

are low-ESR types wired close to the converter. These capacitors are necessary for our test equip-

ment and may not be needed in the user's application.

➁ Input (back) ripple current is tested and speciﬁ ed over 5 Hz to 20 MHz bandwidth. Input ﬁ ltering is

Cbus = 220 μF/100V, Cin = 33 μF/100V and Lbus = 12 μH.

➂ All models are stable and regulate to speciﬁ cation under no load.

➃ Reduction of Hazardous Substances (RoHS) compliance is to RoHS-6 (six substances restricted

including lead). See speciﬁ cations.

➄ The Remote On/Off Control is referred to -Vin.

➅ Regulation speciﬁ cations describe the output voltage changes as the line voltage or load current is

varied from its nominal or midpoint value to either extreme.

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MDC_ULS-30W_C04 Page 15 of 30

TYPICAL PERFORMANCE CURVES, ULS-12/2.5-D48

Maximum Current Temperature Derating at Sea Level

(VIN = 36V, 48V, and 75V, airﬂ ow is from pin 3 to pin 1)

Maximum Current Temperature Derating at Sea Level

(VIN = 60V, airﬂ ow is from pin 3 to pin 1)

Efﬁ ciency vs. Line Voltage and Load Current @ 25°C Power Dissipation vs. Load Current @ 25°C

0.25 0.48 0.70 0.93 1.15 1.38 1.60 1.83 2.05 2.28 2.50

VIN = 75V

VIN = 60V

VIN = 48V

VIN = 36V

Efﬁciency (%)

Load Current (Amps)

0.5

1.0

1.5

2.0

2.5

3.0

3.5

4.0

4.5

0.3 0.5 0.7 0.9 1.2 1.4 1.6 1.8 2.1 2.3 2.5

VIN = 75V

VIN = 60V

VIN = 48V

VIN = 36V

Loss (Watts)

Load Current (Amps)

2.0

2.5

3.0

30 35 40 45 50 55 60 65 70 75 80 85

Output Current (Amps)

Ambient Temperature (ºC)

0.33 to 2.0 m/s (65 to 400 LFM)

2.0

2.5

3.0

30 35 40 45 50 55 60 65 70 75 80 85

0.33 m/s (65 LFM)

0.5 to 2.0 m/s (100 to 400 LFM)

Output Current (Amps)

Ambient Temperature (ºC)

INFRARED THERMAL IMAGE, ULS-12/2.5-D48

Thermal image with hot spot at full load current with 25 °C ambient temperature. Natural convention is used with no forced airﬂ ow. Identiﬁ able and recommended maximum value

to be veriﬁ ed in application. Vin=48V, Q6 max Temp=120 °C/IPC9592 guidelines.

41.0°C

88.5°C

R6: 78

Q6: 79

T1: 67 CR 17: 7 2

(+Vin) (+Vout)

(-Vin) (-Vout)

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OSCILLOGRAMS, ULS-12/2.5-D48

ULS 30-Watt Series

Sixteenth-brick DOSA-Compatible,

Isolated DC/DC Converters

MDC_ULS-30W_C04 Page 16 of 30

Power On Startup Delay (Vin = 48V, Vout = nom., Iout = 2.5A, Cload = 0 µF, Ta = +25°C.,

ScopeBW = 20MHz) Trace 1 = Vin, Trace 4 = Vout

On/Off Enable Delay (Vin = 48V, Vout = nom., Iout = 2.5A, Cload = 0 µF, Ta = +25°C.,

ScopeBW = 20MHz) Trace 1 = Enable, Trace 4 = Vout

Output Ripple and Noise (Vin = 48V, Vout = nom., Iout = 2.5A, Cload = 1 µF ceramic || 10µF

tantalum, Ta = +25°C., ScopeBW = 20MHz)

Step Load Transient Response (Vin = 48V, Vout = nom., Iout = 50-75-50% of full load,

Cload = 1 µF ceramic || 10µF tantalum, Ta = +25°C., ScopeBW = 20MHz)

Output Ripple and Noise (Vin = 48V, Vout = nom., Iout = no load, Cload = 1 µF ceramic ||

10µF tantalum, Ta = +25°C., ScopeBW = 20MHz)

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ULS 30-Watt Series

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MDC_ULS-30W_C04 Page 17 of 30

FUNCTIONAL SPECIFICATIONS, ULS-15/2-D48

ABSOLUTE MAXIMUM RATINGS Conditions ➀Minimum Typical/Nominal Maximum Units

Input Voltage, Continuous 0 80 Vdc

Input Voltage, Transient 100 mS max. duration 100 Vdc

Isolation Voltage Input to output, continuous 2250 Vdc

Input Reverse Polarity None, install external fuse None Vdc

On/Off Remote Control Power on, referred to -Vin 0 15 Vdc

Output Power 030W

Output Current Current-limited, no damage, short-circuit

protected 02A

Storage Temperature Range Vin = Zero (no power) -55 125 °C

Absolute maximums are stress ratings. Exposure of devices to greater than any of these conditions may adversely affect long-term reliability. Proper operation under conditions other than those

listed in the Performance/Functional Speciﬁ cations Table is not implied or recommended.

INPUT Conditions ➀ ➂

Operating voltage range 36 48 75 Vdc

Recommended External Fuse Fast blow 2 A

Start-up threshold Rising input voltage 32.5 33.5 35.5 Vdc

Undervoltage shutdown Falling input voltage 31 32 33 Vdc

Turn-On/Turn-Off Hysteresis 1.42 1.48 1.52 Vdc

Overvoltage shutdown None Vdc

Reverse Polarity Protection None, install external fuse None Vdc

Internal Filter Type Capacitive

Input current

Full Load Conditions Vin = nominal 0.7 0.714 A

Low Line Vin = minimum 0.94 0.95 A

Inrush Transient 0.05 A2-Sec.

Output in Short Circuit 100 200 mA

No Load Iout = minimum, unit = ON 25 50 mA

Shut-Down Input Current (Off, UV, OT) 510mA

Reﬂ ected (back) ripple current ➁Measured at input with speciﬁ ed ﬁ lter 15 30 mA, p-p

GENERAL and SAFETY

Efﬁ ciency Vin = 48V, full load 87.5 89.0 %

Vin = min., full load 87.5 89.0 %

Isolation

Isolation Voltage Input to output, continuous 2250 Vdc

Insulation Safety Rating basic

Isolation Resistance 100 M

Isolation Capacitance 1600 pF

Safety Certiﬁ ed to UL-60950-1, CSA-C22.2 No.60950-1,

IEC/EN60950-1, 2nd edition Yes

Calculated MTBF Per Telcordia SR332, issue 1, class 3, ground

ﬁ xed, Tambient = +25°C 3 Hours x 106

DYNAMIC CHARACTERISTICS

Fixed Switching Frequency 280 290 310 KHz

Startup Time Power on to Vout regulated 30 mS

Startup Time Remote ON to Vout regulated 30 mS

Dynamic Load Response 50-75-50% load step, settling time to within

1% of Vout 200 300 µSec

Dynamic Load Peak Deviation same as above ±250 ±300 mV

FEATURES and OPTIONS

Remote On/Off Control ➄

“N” sufﬁ x:

Negative Logic, ON state ON = Ground pin or external voltage -0.1 0.8 V

Negative Logic, OFF state OFF = Pin open or external voltage 2.5 15 V

Control Current Open collector/drain 1 2 mA

“P” sufﬁ x:

Positive Logic, ON state ON = Pin open or external voltage 10 15 V

Positive Logic, OFF state OFF = Ground pin or external voltage 0 0.7 V

Control Current Open collector/drain 1 2 mA

SMT Mounting "M" sufﬁ x

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ULS 30-Watt Series

Sixteenth-brick DOSA-Compatible,

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MDC_ULS-30W_C04 Page 18 of 30

OUTPUT Conditions ➀Minimum Typical/Nominal Maximum Units

Total Output Power See Derating 0 30 30 W

Voltage

Nominal Output Voltage No trim 14.85 15.00 15.15 Vdc

Setting Accuracy At 50% load, no trim -1 +1 % of Vnom

Output Voltage Range User-adjustable -20 +10 % of Vnom.

Overvoltage Protection Via magnetic feedback 18 19 20 Vdc

Current

Output Current Range 0.0 2.0 2.0 A

Minimum Load No minimum load

Current Limit Inception 98% of Vnom., after warmup 2.45 3.0 3.45 A

Short Circuit

Short Circuit Current Hiccup technique, autorecovery within ±1.25%

of Vout 0.6 A

Short Circuit Duration (remove short for

recovery) Output shorted to ground, no damage Continuous

Short circuit protection method Current limiting

Regulation ➅

Line Regulation Vin = min. to max., Vout = nom., Iout = nom. ±0.125 % of Vout

Load Regulation Iout = min. to max., Vin = 48V ±0.125 % of Vout

Ripple and Noise 5 Hz- 20 MHz BW 115 125 mV pk-pk

Temperature Coefﬁ cient At all outputs ±0.02 % of Vout./°C

Maximum Capacitive Loading Low ESR, resistive load only 0 2200 F

MECHANICAL (Through Hole Models) Conditions ➀ ➂

Outline Dimensions 1.30x0.90x0.36 Inches

(Please refer to outline drawing) LxWxH 33.02x22.86x9.144 mm

Weight 0.58 Ounces

16.4 Grams

Through Hole Pin Diameter 0.04 & 0.062 Inches

1.016 & 1.575 mm

Through Hole Pin Material Copper alloy

TH Pin Plating Metal and Thickness Nickel subplate 50 µ-inches

Gold overplate 5 µ-inches

ENVIRONMENTAL

Operating Ambient Temperature Range With Derating -40 85 °C

Operating Case Temperature Range No derating, full power -40 105 °C

Storage Temperature Vin = Zero (no power) -55 125 °C

Thermal Protection/Shutdown Measured in center 115 125 130 °C

Electromagnetic Interference External ﬁ lter is required

Conducted, EN55022/CISPR22 B Class

Radiated, EN55022/CISPR22 B Class

Relative humidity, non-condensing To +85°C 10 90 %RH

Altitude must derate -1%/1000 feet -500 10,000 feet

-152 3048 meters

RoHS rating ➃RoHS-6

FUNCTIONAL SPECIFICATIONS, ULS-15/2-D48 (CONT.)

Performance Speciﬁ cation Notes

➀ Unless otherwise noted, all speciﬁ cations are typical at nominal input voltage, nominal output voltage

and full load. General conditions are +25° Celsius ambient temperature, near sea level altitude,

natural convection airﬂ ow. All models are tested and speciﬁ ed with external parallel 1 μF and 10 μF

multi-layer ceramic output capacitors. The external input capacitor is 22 μF ceramic. All capacitors

are low-ESR types wired close to the converter. These capacitors are necessary for our test equip-

ment and may not be needed in the user's application.

➁ Input (back) ripple current is tested and speciﬁ ed over 5 Hz to 20 MHz bandwidth. Input ﬁ ltering is

Cbus = 220 μF/100V, Cin = 33 μF/100V and Lbus = 12 μH.

➂ All models are stable and regulate to speciﬁ cation under no load.

➃ Reduction of Hazardous Substances (RoHS) compliance is to RoHS-6 (six substances restricted

including lead). See speciﬁ cations.

➄ The Remote On/Off Control is referred to -Vin.

➅ Regulation speciﬁ cations describe the output voltage changes as the line voltage or load current is

varied from its nominal or midpoint value to either extreme.

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ULS 30-Watt Series

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MDC_ULS-30W_C04 Page 19 of 30

TYPICAL PERFORMANCE CURVES, ULS-15/2-D48

Maximum Current Temperature Derating at Sea Level

(VIN = 36V, 48V, 60V, and 75V, airﬂ ow is from pin 3 to pin 1)

Efﬁ ciency vs. Line Voltage and Load Current @ 25°C Power Dissipation vs. Load Current @ 25°C

0.21 0.39 0.57 0.75 0.93 1.11 1.29 1.47 1.65 1.83 2.01

VIN = 75V

VIN = 60V

VIN = 48V

VIN = 36V

Efﬁciency (%)

Load Current (Amps)

0.5

1.0

1.5

2.0

2.5

3.0

3.5

0.2 0.4 0.6 0.7 0.9 1.1 1.3 1.5 1.6 1.8 2.0

VIN = 75V

VIN = 60V

VIN = 48V

VIN = 36V

Loss (Watts)

Load Current (Amps)

1.5

2.0

2.5

30 35 40 45 50 55 60 65 70 75 80 85

Output Current (Amps)

Ambient Temperature (ºC)

0.33 to 2.0 m/s (65 to 400 LFM)

INFRARED THERMAL IMAGE, ULS-15/2-D48

Thermal image with hot spot at full load current with 25 °C ambient temperature. Natural convention is used with no forced airﬂ ow. Identiﬁ able and recommended maximum value

to be veriﬁ ed in application. Vin=48V, Q6 max Temp=120 °C/IPC9592 guidelines.

45.7°C

80.6°C

R6: 7 3

Q6: 75

T1: 62

(+Vin) (+Vout)

(-Vin) (-Vout)

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ULS 30-Watt Series

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MDC_ULS-30W_C04 Page 20 of 30

OSCILLOGRAMS, ULS-15/2-D48

Power On Startup Delay (Vin = 48V, Vout = nom., Iout = 2A, Cload = 0 µF, Ta = +25°C.,

ScopeBW = 20MHz) Trace 1 = Vin, Trace 4 = Vout

On/Off Enable Delay (Vin = 48V, Vout = nom., Iout = 2A, Cload = 0 µF, Ta = +25°C.,

ScopeBW = 20MHz) Trace 1 = Enable, Trace 4 = Vout

Output Ripple and Noise (Vin = 48V, Vout = nom., Iout = 2A, Cload = 1 µF ceramic || 10µF

tantalum, Ta = +25°C., ScopeBW = 20MHz)

Step Load Transient Response (Vin = 48V, Vout = nom., Iout = 50-75-50% of full load,

Cload = 1 µF ceramic || 10µF tantalum, Ta = +25°C., ScopeBW = 20MHz)

Output Ripple and Noise (Vin = 48V, Vout = nom., Iout = no load, Cload = 1 µF ceramic ||

10µF tantalum, Ta = +25°C., ScopeBW = 20MHz)

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MECHANICAL SPECIFICATIONS, THROUGH-HOLE MOUNT

ULS 30-Watt Series

Sixteenth-brick DOSA-Compatible,

Isolated DC/DC Converters

MDC_ULS-30W_C04 Page 21 of 30

0.550

(13.97)

1.100

(27.94)

1.30

(33.02)

0.300

(7.62)

0.300

(7.62)

0.150

(3.81)

0.150

(3.81)

0.90

(22.86)

GOLD (5u"MIN) OVER NICKEL (50u" MIN)

MATERIAL:

.040 PINS: COPPER ALLOY

.062 PINS: COPPER ALLOY

FINISH: (ALL PINS)

ISOMETRIC VIEW

BOTTOM PIN VIEW

SIDE VIEW END VIEW

0.010 MIN

CLEARANCE

0.040 @

0.36

(9.144)

0.18

(4.572)

PINS 1-3, 5-7

00.060 @

PINS 4 & 8

*Sense is included on the ULS-3.3/8-D48 and

ULS-5/6-D48 only.

The 0.18-inch pin length is shown. Please refer to the

part number structure for alternate pin lengths.

Pin material: Copper alloy. Plating: Gold over nickel

Please note that some competitive units may use differ-

ent pin numbering or alternate outline views; however, all

units are plugin-compatible.

It is recommended that no parts be placed beneath

the converter.

Third Angle Projection

Dimensions are in inches (mm shown for ref. only).

Components are shown for reference only.

Tolerances (unless otherwise speciﬁed):

.XX ± 0.02 (0.5)

.XXX ± 0.010 (0.25)

Angles ± 2˚

0.92

(23.4)

0.100 MIN

ANNULAR RING

FOR ALL PIN

SHOULDERS

0.300

(7.62)

0.300

(7.62)

1.100

(27.94)

(33.5)

1.32

(11.7)

0.46

(14.0)

0.55

(3.80)

0.150

(3.80)

0.150

LFINISHED HOLE SIZES

@ PINS 4 & 8

(PER IPC-D-275, LEVEL C)

.070-.084

(SEC)

(PRI)

FINISHED HOLE SIZES

@ PINS 1-3, 5-7

(PER IPC-D-275, LEVEL C)

.048-.062

Recommended Footprint

(View Through Converter)

Top View

It is recommended that no parts be placed beneath converter

INPUT/OUTPUT CONNECTIONS P75

Pin Function Pin Function

3 -Vin 4 -Vout

5 (-)Sense

2 On/Off Control 6 Trim

7 (+)Sense

1 +Vin 8 +Vout

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MECHANICAL SPECIFICATIONS, SURFACE MOUNT (MSL RATING 2)

Third Angle Projection

Dimensions are in inches (mm shown for ref. only).

Components are shown for reference only.

Tolerances (unless otherwise speciﬁed):

.XX ± 0.02 (0.5)

.XXX ± 0.010 (0.25)

Angles ± 2˚

0.36

(9.144)

ISOMETRIC VIEW

BOTTOM PIN VIEW

SIDE VIEW END VIEW

1.100

(27.94)

1.30

(33.02)

0.300

(7.62)

0.300

(7.62)

0.90

(22.86)

0.550

(13.97)

0.150

(3.81)

0.150

(3.81)

.36

0.125

REF

0.010 MIN

CLEARANCE

0.062 TYP

(ALL PINS) MATERIAL:

SMT CONTACTS: COPPER ALLOY

FINISH: (ALL PINS)

GOLD (5u"MIN) OVER NICKEL (50u" MIN)

Please note that some competitive units may use

different pin numbering or alternate outline views;

however, all units are plugin-compatible.

It is recommended that no parts be placed

beneath the converter.

Sense is included on the ULS-3.3/8-D48 and

ULS-5/6-D48 only.

INPUT/OUTPUT CONNECTIONS P75

Pin Function Pin Function

3 -Vin 4 -Vout

5 (-)Sense

2 On/Off Control 6 Trim

7 (+)Sense

1 +Vin 8 +Vout

ULS 30-Watt Series

Sixteenth-brick DOSA-Compatible,

Isolated DC/DC Converters

MDC_ULS-30W_C04 Page 22 of 30

Recommended Footprint

(View Through Converter)

Top View

1.100

(27.94)

(11.7)

0.46

0.92

(23.4)

(33.5)

1.32

(14.0)

0.55

0.300

(7.62)

0.300

(7.62)

(3.80)

0.150

(3.80)

0.150

0.070 MIN PAD

(6 or 8 PLS

AS REQUIRED)

(SEC)

(PRI)

It is recommended that no parts be placed beneath converter

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ULS 30-Watt Series

Sixteenth-brick DOSA-Compatible,

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MDC_ULS-30W_C04 Page 23 of 30

SHIPPING TRAYS AND BOXES, THROUGH-HOLE MOUNT

SHIPPING TRAY DIMENSIONS

10.50 (266.7) ±.25 11.00 (279.4) ±.25

4.50 (114.3) ±.25

Closed height

32 units per tray

4 trays per box

Each static dissipative polyethylene foam tray accommodates 32 converters in a 4 x 8 array.

Material: Low density, closed cell polyethylene anti-static foam

4-C 0.26

(6.5)

0.87

(22.00)

0.59

(15.00)

0.91

(23.00)

9.84

(250.00)

9.84

(250.00)

0.47

(12.00)

0.24

(6.00)

0.51

(13.00)

1.34

(34.00)

1.97

(50.00)

0.31

(8.00)

R0.31

(8.00)

Third Angle Projection

Dimensions are in inches (mm shown for ref. only).

Components are shown for reference only.

Tolerances (unless otherwise speciﬁed):

.XX ± 0.02 (0.5)

.XXX ± 0.010 (0.25)

Angles ± 1˚

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ULS 30-Watt Series

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MDC_ULS-30W_C04 Page 24 of 30

Third Angle Projection

Dimensions are in inches (mm shown for ref. only).

Components are shown for reference only.

Tolerances (unless otherwise speciﬁed):

.XX ± 0.02 (0.5)

.XXX ± 0.010 (0.25)

Angles ± 1˚

0.354 (9.00) MAX

PICKUP NOZZLE

0.14

(3.556)

0.85

(21.59)

1.26

PITCH

(32.0)

Feed (Unwind)

Direction ----

Round

Holes

Oblong

Holes

Pin #1

0.069

(1.75)

1.732

(44.00)

TAPE AND REEL

(200 UNITS

PER REEL)

1.73

REF

(44.0)

13.00

(330.20)

.512

(13.00)

4.00

CORE

(101.60)

Top Cover Tape

TAPE AND REEL INFORMATION (MSL RATING 2)

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ULS 30-Watt Series

Sixteenth-brick DOSA-Compatible,

Isolated DC/DC Converters

MDC_ULS-30W_C04 Page 25 of 30

I/O Filtering, Input Ripple Current, and Output Noise

All models in the ULS Series are tested/speciﬁ ed for input reﬂ ected ripple

current and output noise using the speciﬁ ed external input/output components/

circuits and layout as shown in the following two ﬁ gures. External input capaci-

tors (CIN in Figure 2) serve primarily as energy-storage elements, minimiz-

ing line voltage variations caused by transient IR drops in conductors from

backplane to the DC/DC. Input caps should be selected for bulk capacitance

(at appropriate frequencies), low ESR, and high rms-ripple-current ratings. The

switching nature of DC/DC converters requires that dc voltage sources have

low ac impedance as highly inductive source impedance can affect system sta-

bility. In Figure 2, CBUS and LBUS simulate a typical dc voltage bus. Your speciﬁ c

system conﬁ guration may necessitate additional considerations.

In critical applications, output ripple/noise (also referred to as periodic and

random deviations or PARD) may be reduced below speciﬁ ed limits using ﬁ lter-

ing techniques, the simplest of which is the installation of additional external

output capacitors. They function as true ﬁ lter elements and should be selected

for bulk capacitance, low ESR and appropriate frequency response.

All external capacitors should have appropriate voltage ratings and be

located as close to the converter as possible. Temperature variations for all

relevant parameters should also be taken carefully into consideration. The most

effective combination of external I/O capacitors will be a function of line voltage

and source impedance, as well as particular load and layout conditions.

Floating Outputs

Since these are isolated DC/DC converters, their outputs are “ﬂ oating” with

respect to their input. Designers will normally use the –Output as the ground/

return of the load circuit. You can however, use the +Output as ground/return to

effectively reverse the output polarity.

Minimum Output Loading Requirements

ULS converters employ a synchronous-rectiﬁ er design topology and all models

regulate within spec and are stable under no-load to full load conditions.

Operation under no-load conditions however might slightly increase the output

ripple and noise.

Input Fusing

Certain applications and/or safety agencies may require the installation of

fuses at the inputs of power conversion components. Fuses should also be

used if the possibility of sustained, non-current-limited, input-voltage polarity

reversals exists. For DATEL ULS series DC/DC converters, we recommend the

use of a fast blow fuse, installed in the ungrounded input supply line with a

typical value about twice the maximum input current, calculated at low line

with the converter’s minimum efﬁ ciency.

All relevant national and international safety standards and regulations must

be observed by the installer. For system safety agency approvals, the convert-

ers must be installed in compliance with the requirements of the end- use

safety standard, i.e. IEC/EN/UL60950-1.

Input Reverse-Polarity Protection

If the input voltage polarity is accidentally reversed, an internal diode will

become forward biased and likely draw excessive current from the power

source. If this source is not current limited or the circuit appropriately fused, it

could cause permanent damage to the converter.

Input Under-Voltage Shutdown and Start-Up Threshold

Under normal start-up conditions, devices will not begin to regulate properly

until the ramping-up input voltage exceeds the Start-Up Threshold Voltage.

Once operating, devices will not turn off until the input voltage drops below the

Under-Voltage Shutdown limit. Subsequent re-start will not occur until the input

is brought back up to the Start-Up Threshold. This built in hysteresis prevents

any unstable on/off situations from occurring at a single input voltage.

Start-Up Time

The VIN to VOUT Start-Up Time is the time interval between the point at which

the ramping input voltage crosses the Start-Up Threshold and the fully loaded

output voltage enters and remains within its speciﬁ ed accuracy band. Actual

measured times will vary with input source impedance, external input capaci-

tance, and the slew rate and ﬁ nal value of the input voltage as it appears at the

converter. The ULS Series implements a soft start circuit to limit the duty cycle

of its PWM controller at power up, thereby limiting the input inrush current.

The On/Off Control to VOUT start-up time assumes the converter has its

nominal input voltage applied but is turned off via the On/Off Control pin. The

speciﬁ cation deﬁ nes the interval between the point at which the converter is

turned on (released) and the fully loaded output voltage enters and remains

within its speciﬁ ed accuracy band. Similar to the VIN to VOUT start-up, the On/Off

Control to VOUT start-up time is also governed by the internal soft start circuitry

and external load capacitance. The difference in start up time from VIN to VOUT

and from On/Off Control to VOUT is therefore insigniﬁ cant.

Input Source Impedance

The input of ULS converters must be driven from a low ac-impedance source.

The DC/DC’s performance and stability can be compromised by the use of

highly inductive source impedances. The input circuit shown in Figure 2 is a

practical solution that can be used to minimize the effects of inductance in the

input traces. For optimum performance, components should be mounted close

to the DC/DC converter.

BUS

= 33μF, ESR < 700mΩ @ 100kHz

BUS

= 220μF, ESR < 100mΩ @ 100kHz

BUS

= 12μH

+VIN

–VIN

CURRENT

PROBE

OSCILLOSCOPE

–

Figure 2. Measuring Input Ripple Current

TECHNICAL NOTES

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ULS 30-Watt Series

Sixteenth-brick DOSA-Compatible,

Isolated DC/DC Converters

MDC_ULS-30W_C04 Page 26 of 30

Figure 5. Trim Connections To Increase Output Voltages.

If units have sense pins, Connect trim to + Sense pin.

LOAD

RTRIM UP

+VOUT

–VIN

+VIN

ON/OFF

CONTROL TRIM

–VOUT

LOAD

RTRIM DOWN

+VOUT

–VIN

+VIN

ON/OFF

CONTROL TRIM

–VOUT

Figure 6. Trim Connections To Decrease Output Voltages.

If units have sense pins, connect Trim to (-) Sense pins.

Short Circuit Condition

When a converter is in current-limit mode, the output voltage will drop as the

output current demand increases. If the output voltage drops too low, the mag-

netically coupled voltage used to develop primary side voltages will also drop,

thereby shutting down the PWM controller. Following a time-out period, the

PWM will restart causing the output voltage to begin ramping to their appropri-

ate value. If the short-circuit condition persists, another shutdown cycle will be

initiated. This on/off cycling is referred to as “hiccup” mode. The hiccup cycling

reduces the average output current, thereby preventing internal temperatures

from rising to excessive levels. The ULS Series is capable of enduring an

indeﬁ nite short circuit output condition.

On/Off Control

The input-side, remote On/Off Control function can be ordered to operate with

either logic type:

Positive ("P" sufﬁ x) logic models are enabled when the on/off pin is

left open (or is pulled high, applying +10V to +15V with respect to –Input).

Positive-logic devices are disabled when the on/off pin is pulled low (0 to 0.7V

with respect to –Input).

Negative (“N” sufﬁ x) logic devices are off when pin is left open (or pulled

high, applying +2.5V to +15V), and on when pin is pulled low (-0.1 to 0.8V)

with respect to –Input as shown in Figure 4.

Dynamic control of the remote on/off function is best accomplished with a

mechanical relay or an open-collector/open-drain drive circuit (optically isolated

if appropriate). The drive circuit should be able to sink appropriate current (see

Performance Speciﬁ cations) when activated and withstand appropriate voltage

when deactivated. Applying an external voltage to pin 2 when no input power is

applied to the converter can cause permanent damage to the converter.

Thermal Shutdown

The ULS converters are equipped with thermal-shutdown circuitry. If environ-

mental conditions cause the temperature of the DC/DC converter to rise above

the designed operating temperature, a precision temperature sensor will power

down the unit. When the internal temperature decreases below the threshold

of the temperature sensor, the unit will self start. See Performance/Functional

Speciﬁ cations.

Output Over-Voltage Protection

The ULS output voltage is monitored for an over-voltage condition using a com-

parator. The signal is optically coupled to the primary side and if the output volt-

age rises to a level which could be damaging to the load, the sensing circuitry

will power down the PWM controller causing the output voltage to decrease.

Following a time-out period the PWM will restart, causing the output voltage

to ramp to its appropriate value. If the fault condition persists, and the output

voltage again climbs to excessive levels, the over-voltage circuitry will initiate

another shutdown cycle. This on/off cycling is referred to as “hiccup” mode.

Current Limiting

As soon as the output current increases to approximately 130% of its rated

value, the DC/DC converter will go into a current-limiting mode. In this condi-

tion, the output voltage will decrease proportionately with increases in output

current, thereby maintaining somewhat constant power dissipation. This is

commonly referred to as power limiting. Current limit inception is deﬁ ned

as the point at which the full-power output voltage falls below the speciﬁ ed

tolerance. See Performance/Functional Speciﬁ cations. If the load current, being

drawn from the converter, is signiﬁ cant enough, the unit will go into a short

circuit condition as described below.

C1 = 1μF

C2 = 10μF

LOAD 2-3 INCHES (51-76mm) FROM MODULE

C2 RLOAD

SCOPE

+VOUT

–VOUT

Figure 3. Measuring Output Ripple/Noise (PARD)

+Vcc

13V CIRCUIT

5V CIRCUIT

–VIN

O N /O F F

C O N TR O L

+VIN

Figure 4. Driving the Negative Logic On/Off Control Pin (simpliﬁ ed circuit)

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ULS 30-Watt Series

Sixteenth-brick DOSA-Compatible,

Isolated DC/DC Converters

MDC_ULS-30W_C04 Page 27 of 30

DOWN

RT (k:) =

Where ∆% 

 × 100

– 10.22

∆%

511

Trim Down

Trim Equations

Trim Up

RT (k:) = –

1.225 × ∆%

5.11 × VOUT × (100 + ∆%)

∆%

511 – 10.22

VOUT – VNOM

VNOM

Where ∆% 

 × 100

VOUT – VNOM

VNOM

Note: “∆%” is always a positive value.

“VNOM” is the nominal, rated output voltage.

“VOUT” is the desired, changed output voltage.

Remote Sense (ULS-3.3/8-D48 and ULS-5/6-D48 models only)

Note: The Sense and VOUT lines are internally connected through low-value

resistors. Nevertheless, if the sense function is not used for remote regula-

tion the user should connect the +Sense to +VOUT and –Sense to –VOUT at

the DC/DC converter pins. ULS series converters employ a sense feature to

provide point of use regulation, thereby overcoming moderate IR drops in PCB

conductors or cabling. The remote sense lines carry very little current and

therefore require minimal cross-sectional-area conductors. The sense lines,

which are capacitively coupled to their respective output lines, are used by

the feedback control-loop to regulate the output. As such, they are not low

impedance points and must be treated with care in layouts and cabling. Sense

lines on a PCB should be run adjacent to dc signals, preferably ground.

[VOUT(+)-VOUT(–)] – [Sense(+)-Sense(–)] d 10%VOUT

In cables and discrete wiring applications, twisted pair or other techniques

should be used. Output over-voltage protection is monitored at the output volt-

age pin, not the Sense pin. Therefore, excessive voltage differences between

VOUT and Sense in conjunction with trim adjustment of the output voltage can

cause the over-voltage protection circuitry to activate (see Performance Speci-

ﬁ cations for over-voltage limits). Power derating is based on maximum output

current and voltage at the converter’s output pins. Use of trim and sense func-

tions can cause output voltages to increase, thereby increasing output power

beyond the converter’s speciﬁ ed rating, or cause output voltages to climb into

the output over-voltage region. Therefore, the designer must ensure:

(VOUT at pins) x (IOUT) d rated output power

LOAD

+VOUT

–VIN

Sense Current

Contact and PCB resistance

losses due to IR drops

Contact and PCB resistance

losses due to IR drops

Sense Return

+VIN

ON/OFF

CONTROL TRIM

+SENSE

–VOUT

–SENSE

IOUT Return

IOUT

Figure 7. Remote Sense Circuit Conﬁ guration

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ULS 30-Watt Series

Sixteenth-brick DOSA-Compatible,

Isolated DC/DC Converters

MDC_ULS-30W_C04 Page 28 of 30

Through-hole Soldering Guidelines

Murata Power Solutions recommends the TH soldering speciﬁ cations below when install-

ing these converters. These speciﬁ cations vary depending on the solder type. Exceeding

these speciﬁ cations may cause damage to the product. Your production environment may

differ; therefore please thoroughly review these guidelines with your process engineers.

Wave Solder Operations for through-hole mounted

products (THMT)

For Sn/Ag/Cu based solders:

Maximum Preheat Temperature 115° C.

Maximum Pot Temperature 270° C.

Maximum Solder Dwell Time 7 seconds

For Sn/Pb based solders:

Maximum Preheat Temperature 105° C.

Maximum Pot Temperature 250° C.

Maximum Solder Dwell Time 6 seconds

SMT Reﬂ ow Soldering Guidelines

The surface-mount reﬂ ow solder proﬁ le shown below is suitable for SAC305 type lead-

free solders. This graph should be used only as a guideline. Many other factors inﬂ uence

the success of SMT reﬂ ow soldering. Since your production environment may differ,

please thoroughly review these guidelines with your process engineers.

Trimming by Using an External Voltage Source

1. The easiest way to trim the output using an external voltage source is to

drive the Trim pin directly from a variable source. The following equation can

be used to calculate the voltage at the Trim pin.

Vo is the output voltage you want; Vonominal is the nominal output voltage;

Vtrim is the voltage that should appear at the trim pin.

2. If the purpose of trimming is to compensate voltage drop of power path

from converter to the Load, you may separately connect the sense pin directly

to the load. It’s much easier than real time adjusting trim voltage.

3. CAUTION: To avoid unplanned power down cycles, do not exceed EITHER

the maximum output voltage OR the maximum output power when setting

the trim. If the output voltage is excessive, the OVP circuit may shut down the

converter. If the maximum power is exceeded, the converter may enter current

limiting. If the power is exceeded for an extended period, the converter may

overheat and encounter overtemperature shut down. Be careful of external

electrical noise. The Trim input is a sensitive input to the converter’s feedback

control loop. Excessive electrical noise may cause instability or oscillation.

Vonominal

Vtrim = 2 x 1.24 x − 1.24

Figure 8. Trimming with an external source

LOAD

+VOUT

+VIN

–VIN

ON/OFF

CONTROL TRIM

+SENSE

–VOUT

External

source

–SENSE

–

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ULS 30-Watt Series

Sixteenth-brick DOSA-Compatible,

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MDC_ULS-30W_C04 Page 29 of 30

Emissions Performance

Murata Power Solutions measures its products for radio frequency emissions

against the EN 55022 and CISPR 22 standards. Passive resistance loads are

employed and the output is set to the maximum voltage. If you set up your

own emissions testing, make sure the output load is rated at continuous power

while doing the tests.

The recommended external input and output capacitors (if required) are

included. Please refer to the fundamental switching frequency. All of this

information is listed in the Product Speciﬁ cations. An external discrete ﬁ lter is

installed and the circuit diagram is shown below.

[1] Conducted Emissions Parts List

[2] Conducted Emissions Test Equipment Used

Rohde & Schwarz EMI Test Receiver (9KHz – 1000MHz) ESPC

Rohde & Schwarz Software ESPC-1 Ver. 2.20

HP11947A Transient Limiter (Agilent)

OHMITE 25W – Resistor combinations

DC Source Programmable DC Power Supply Model 62012P-100-50

[3] Layout Recommendations

Most applications can use the ﬁ ltering which is already installed inside the

converter or with the addition of the recommended external capacitors. For

greater emissions suppression, consider additional ﬁ lter components and/or

shielding. Emissions performance will depend on the user’s PC board layout,

the chassis shielding environment and choice of external components. Please

refer to Application Note GEAN-02 for further discussion.

Since many factors affect both the amplitude and spectra of emissions, we

recommend using an engineer who is experienced at emissions suppression.

[4] Conducted Emissions Test Results

Reference Part Number Description Vendor

L1 PE-62913 1mH, 6A Pulse

L2 NC 4.7uH, 3.6A Murata

C1, C2 VZ Series

Ceramic Capacitor

(3.2uf) = 2.2ufd/1ufd in

parallel, 100V

Panasonic

C3 VZ Series Qty 2 - Electrolytic Capacitor

22ufd, 100V Panasonic

C4, C5 Unknown 3.3nF, 1500V Unknown

C6 VZ Series Electrolytic Capacitor 33ufd,

100V Panasonic

C6C3C1 Vin+ Vout+

Vout-Vin-

Black

DC Source

Resistive Load

inside a metal

container

Test Card

UUT

Resistive Load

V-

V+ L2

Figure 9. Conducted Emissions Test Circuit

Graph 1. ULS-3.3/8-D48N-C conducted emissions performance, Peak Detection Mode,

CISPR/EN55022, Class B, full load at 48Vin

Graph 2. ULS-12/2.5-D48N-C conducted emissions performance, Peak Detection Mode,

CISPR/EN55022, Class B, full load at 48Vin

Graph 3. ULS-15/2-D48P-C conducted emissions performance, Peak Detection Mode,

CISPR/EN55022, Class B, full load at 48Vin

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Murata Power Solutions, Inc. makes no representation that the use of its products in the circuits described herein, or the use of other

technical information contained herein, will not infringe upon existing or future patent rights. The descriptions contained herein do not imply

the granting of licenses to make, use, or sell equipment constructed in accordance therewith. Speciﬁ cations are subject to change without

Murata Power Solutions, Inc.

11 Cabot Boulevard, Mansﬁ eld, MA 02048-1151 U.S.A.

ISO 9001 and 14001 REGISTERED

This product is subject to the following operating requirements

and the Life and Safety Critical Application Sales Policy:

Refer to: http://www.murata-ps.com/requirements/

ULS 30-Watt Series

Sixteenth-brick DOSA-Compatible,

Isolated DC/DC Converters

MDC_ULS-30W_C04 Page 30 of 30

Figure 10. Vertical Wind Tunnel

IR Video

Camera

IR Transparent

optical window Variable

speed fan

Heating

element

Ambient

temperature

sensor

Airﬂow

collimator

Precision

low-rate

anemometer

3” below UUT

Unit under

test (UUT)

Vertical Wind Tunnel

Murata Power Solutions employs a computer controlled

custom-designed closed loop vertical wind tunnel, infrared

video camera system, and test instrumentation for accurate

airﬂ ow and heat dissipation analysis of power products.

The system includes a precision low ﬂ ow-rate anemometer,

variable speed fan, power supply input and load controls,

temperature gauges, and adjustable heating element.

The IR camera monitors the thermal performance of the

Unit Under Test (UUT) under static steady-state conditions. A

special optical port is used which is transparent to infrared

wavelengths.

Both through-hole and surface mount converters are

soldered down to a host carrier board for realistic heat

absorption and spreading. Both longitudinal and transverse

airﬂ ow studies are possible by rotation of this carrier board

since there are often signiﬁ cant differences in the heat

dissipation in the two airﬂ ow directions. The combination of

adjustable airﬂ ow, adjustable ambient heat, and adjustable

Input/Output currents and voltages mean that a very wide

range of measurement conditions can be studied.

The collimator reduces the amount of turbulence adjacent

to the UUT by minimizing airﬂ ow turbulence. Such turbu-

lence inﬂ uences the effective heat transfer characteristics

and gives false readings. Excess turbulence removes more

heat from some surfaces and less heat from others, possibly

causing uneven overheating.

Both sides of the UUT are studied since there are different

thermal gradients on each side. The adjustable heating element

and fan, built-in temperature gauges, and no-contact IR camera mean

that power supplies are tested in real-world conditions.