JAHW075F1 - Tyco Electronics

Data Sheet

March 2005

JAHW050F, JAHW075F, and JAHW100F Power Modules:

dc-dc Converters; 36 to 75 Vdc Input, 3.3 Vdc Output; 33 W to 66 W

Applications

■Distributed power architectures

■Computer equipment

■Communications eq uipment

Options

■Heat sinks available for extended operation

■Choice of remote on/off logic configuration

■Basic Insulation (-B version only)

■Latching protection features

Features

■Small size: 61.0 mm x 57.9 mm x 12.7 mm

(2.40 in. x 2.28 in. x 0.50 in.)

■High power density

■Very high efficiency: 88% typical

■Low output noise

■Constant frequency

■Industry-standard pinout

■Metal baseplate

■2:1 input voltage range

■Overtemperature protection (hiccup mode)

■Overcurrent protection (hiccup mode)

■Output ov ervoltage protection (hiccup mode)

■Remote sense

■Remote on/off

■Adjustable output voltage

■Case ground pin

■ISO * 9001 Certified manufacturing facilities

■Meets the voltage and current requirements for

ETSI 300-132-2 and complies with and is Licensed

f or Basic Insulation rating per EN6095 0 (-B version

only)

■UL† 60950 Recognized, CSA‡ 22.2 No. 60950-00

Certified, and VDE § 0805 (IEC60950, IEC950)

Licensed

■CE mark meets 73/23/EEC and 93/68/EEC

directives**

The JAHW Series Power Modules use advanced, surface-

mount technology and deliver high-quality, efficient, and

compact dc-dc conversion.

Description

The JAHW050F, JAHW075F, and JAHW100F Power Modules are dc-dc converters that operate over an input

voltage range of 36 Vdc to 75 Vdc and provide a precisely regulated dc output. The outputs are fully isolated

from the inputs, allowing versatile polarity configur ations and grounding connections. The modules have maxi-

mum power ratings from 33 W to 66 W at a typical full-load efficien cy of 88%.

The sealed modules offer a metal baseplate for excellent thermal performance. Threaded-through holes are

provided to allow easy mounting or addition of a heat sink for high-temperatur e applications. The standard fea-

ture set includes remote sensing, output trim, and remote on/off for convenient flexibility in distributed power

applications.

* ISO is a registered trademark of the International Organization for Standardization.

† UL is a registered trademark of Underwriters Laboratories, Inc.

‡ CSA is a registered trademark of Canadian Standards Association.

§ VDE is a trademark of Verband Deutscher Elektrotechniker e.V.

** This product is intended for integration into end-use equipment. All the required procedures for CE marking of end-use equipment should be followed. (The CE mark is placed on

selected products.)

2Tyco Electronics Corp.

Data Sheet

March 2005

dc-dc Converters; 36 to 75 Vdc Input, 3.3 Output; 33 W to 66 W

JAHW050F, JAHW075F, and JAHW100F Power Modules:

Absolute Maximum Ratings

Stresses in excess of the absolute maximum ratings can cause permanent damage to the d evice. Th ese a re abso-

lute stress ratings only. Functional operation of the device is not implied at these or any other con ditions in excess

of those given in the operations sections of the data sheet. Exposure to absolute maximum ratings for ex tended

periods can adversely affect device reliability.

Electrical Specifications

Unless otherwise indicated, specifications apply over all operating input voltage, resistive load, and temperature

conditions.

Table 1. Input Specifications

Fusing Considerations

CAUTION: This power module is not internally fused. An input line fuse must always be used.

This encapsulated power module can be used in a wide variety of applications, ranging from simple stand-alone

operation to an integrated part of a sophisticated power architecture. To preserve maximum flexibility, internal fus-

ing is not included; ho w ever, t o achiev e ma xim um safety and syste m protectio n, alw ays use an input line fuse . Th e

safety agencies require a normal-blow fuse with a maximum rating of 6 A (see Safety Considerations section).

Based on the information provided in this da ta sheet on inrush energy and maximum dc input current, the same

type of fuse with a lower r ating can be used. Refer to the fuse manufacturer’s data for further information.

Parameter Symbol Min Max Unit

Input Volta ge:

Continuous

Transie nt (1 00 ms) VI

VI, trans —

—80

100 Vdc

Operating Case Temperature

(See Thermal Considerations section.) TC–40 100 °C

Storage Temperature Tstg –55 125 °C

I/O Isolation Voltage — — 1500 Vdc

Parameter Symbol Min Typ Max Unit

Operat ing Input Voltage VI36 48 75 Vdc

Maximu m Input Current

(VI = 0 V to 75 V; IO = IO, max ); see Figures 1—3:

JAHW050F

JAHW075F

JAHW100F

(VI = 36 V to 75 V; IO = IO, max); see Figures 1—3:

JAHW050F

JAHW075F

JAHW100F

II, max

—

1.2

1.8

2.4

1.2

1.8

2.4

Inrush Transient i2t——1.0A

Input Reflec te d- ripple Curr en t, Peak-to-peak

(5 Hz to 20 MHz, 12 µH source impedance;

see Figure 16.)

II —5—mAp-p

Input Ripple Rejection (120 Hz) — — 60 — dB

Tyco Electronics Corp. 3

Data Sheet

March 2005 dc-dc Converters; 36 to 75 Vdc Input, 3.3 Output; 33 W to 66 W

JAHW050F, JAHW075F, and JAHW100F Power Modules:

Electrical Specifications (continued)

Table 2. Output Specifications

* Stability consideration, (See Design Considerations, Output Capacitance Section)

† These are manufacturing test limits. In some situations, results may differ.

‡ Some characteristic are specified with 10 µF aluminum and 1 µF ceramic.

Table 3. Isolation Specifications

Parameter Device Symbol Min Typ Max Unit

Output Voltage Set Point

(VI = 48 V; IO = IO, max; TC = 25 °C) All VO, set 3.25 3.3 3.35 Vdc

Output Voltage

(Over all operating input voltage , static resistive

load, and temperature conditions until end of

life. See Figure 18.)

All VO3.20 — 3.40 Vdc

Output Regulation:

Line (VI = 36 V to 75 V)

Load (IO = IO, min to IO, max)

Te m pe rat ur e (TC = –40 °C to +100 °C)

All

—

0.01

0.05

0.1

0.2

%VO

Output Ripple and Noise Voltage

(See Figure 17.):

RMS

Peak-to-peak (5 Hz to 20 MHz) All

All —

——

—50

100 mVrms

mVp-p

External Load Capacitance All — 0‡—*µF

Output Current

(At IO < IO, min, the modules may exceed output

ripple specifications.)

JAHW050F

JAHW075F

JAHW100F

0.5

—

Output Current-limit Inception

(VO = 90% of VO, nom)JAHW050F

JAHW075F

JAHW100F

IO, cli

—

15†

20†

25†

Output Short-circuit Current (VO = 250 mV ) All — — 170 — %IO, max

Efficiency (VI = 48 V; IO = IO, max; TC = 70 °C) JAHW050F

JAHW075F

JAHW100F

—

88.6

89.2

—

Switching Frequency All — — 340 — kHz

Dynamic Response

(∆IO/∆t = 1 A/10 µs, VI = 48 V, TC = 25 °C; tested

with a 10 µF aluminum and a 1.0 µF tantalum

capacitor across the load .):

Load Change fr om IO = 50% to 75% of IO, max:

Peak Deviation

Settling Time (VO < 10% of peak de viation)

Load Change fr om IO = 50% to 25% of IO, max:

Peak Deviation

Settling Time (VO < 10% of peak de viation)

All

—

200

—

%VO, set

µs

%VO, set

µs

Parameter Min Typ Max Unit

Isolation Capacitance — 2500 — pF

Isolation Resistance 10 — — MΩ

4Tyco Electronics Corp.

Data Sheet

March 2005

dc-dc Converters; 36 to 75 Vdc Input, 3.3 Output; 33 W to 66 W

JAHW050F, JAHW075F, and JAHW100F Power Modules:

General Specifications

Feature Specifications

Unless otherwise indicated, specifications apply over all operating input voltage, resistive load, and temperature

conditions. See Feature Descriptions for additional information.

* These are manufacturing test limits. In some situations, results may differ.

Solder, Cleaning, and Drying Considerations

Post solder clea ning is usually th e final circu it-boar d assembly process prior to electrical testing. The result o f inad-

equate circuit-board cleaning and drying can affect both the reliability of a power module and the testability of the

finished circuit-board assembly. For guidance on appropriate soldering, cleaning, and drying procedures, refer to

the Board-Mounted Power Modules Soldering and Cle aning Application Note (AP97-021EPS).

Parameter Min Typ Max Unit

Calculated MTBF (IO = 80% of I O, max; TC = 40 °C) 2,700,000 hours

Weight — — 100 (3.5) g (oz.)

Parameter Symbol Min Typ Max Unit

Remote On/Off Signal Interface

(VI = 0 V to 75 V; open collector or equivalent compatible;

signal referenced to VI(–) terminal; see Figure 19 and

Feature Descriptions.):

JAHWxxxF1 Pref erred Logic:

Logic Low—Module On

Logic High—Module Off

JAHWxxxF Optional Logic:

Logic Low—Module Off

Logic High—Module On

Logic Low:

At Ion/off = 1.0 mA

At Von/off = 0.0 V

Logic High:

At Ion/off = 0.0 µA

Leakage Current

Turn-on Time (See Figure 15.)

(IO = 80% of IO, max; VO within ±1% of stead y stat e)

Von/off

Ion/off

Von/off

Ion/off

—

1.2

1.0

µA

Output Voltage Adjustment (See Feature Descriptions.):

Output Voltage Remo te-sense Range

Output Voltage Set-point Adjustment Range (trim) —

——

60 —

—0.5

110 V

%VO, nom

Output Overvoltage Protection VO, sd 4.0* — 5.0* V

Overtemperature Protection

(See Feature Descriptions.) TC—110— °C

Data Sheet

March 2005

Tyco Electronics Corp. 5

dc-dc Converters; 36 to 75 Vdc Input, 3.3 Output; 33 W to 66 W

JAHW050F, JAHW075F, and JAHW100F Power Modules:

Characteristic Curves

The following f igures provide typical characteristics for the power modules. The figures are identical for both on/off

configurations.

8-2244 (F)

Figure 1. Typical JAHW050F Input Characteristics

at Room Temperature

8-2291 (F)

Figure 2. Typical JAHW075F Input Characteristics

at Room Temperature

8-2503 (F)

Figure 3. Typical JAHW100F Input Charact eristics

at Room Temperature

8-2245 (F)

Figure 4. Typical JAHW050F Converter Efficiency

vs. Output Current at Room Temper ature

1.3

INPUT VOLTAGE, VI (V)

INPUT CURRENT, II (A)

10 20 30 40 50 60 70 75

1.2

1.1

1.0

0.9

0.8

0.7

0.6

0.5

0.4

0.3

0.2

0.1

0.0 5 152535455565

IO = 10 A

IO = 5 A

IO = 0.5 A

2.0

10 INPUT VOLTAGE, VI (V)

INPUT CURRENT, II (A)

20 30 40 5015 25 35 4550

1.8

1.6

1.4

1.2

1.0

0.8

0.6

0.4

0.2

0.0 55 60 65 70 75

IO = 15 A

IO = 7.5 A

IO = 0.75 A

2.5

10 INPUT VOLTAGE, VI (V)

INPUT CURRENT, II (A)

20 30 40 5015 25 35 45 55 60 65 70 75

2.0

1.5

1.0

0.5

0.0 50

IO = 20 A

IO = 10 A

IO = 1 A

2OUTPUT CURRENT, IO (A)

EFFICIENCY, η (%)

468103579

VI = 36 V

VI = 48 V

VI = 75 V

6Tyco Electronics Corp.

Data Sheet

March 2005

dc-dc Converters; 36 to 75 Vdc Input, 3.3 Output; 33 W to 66 W

JAHW050F, JAHW075F, and JAHW100F Power Modules:

Characteristic Curves (continued)

8-2311 (F)

Figure 5. Typical JAHW075F Converter Efficiency

vs. Output Current at Room Temperature

8-2485 (F)

Figure 6. Typical JAHW100F Converter Efficiency

vs. Output Current at Room Temperature

8-2293 (F)

Note: See Figure 17 for test conditions.

Figure 7. Typical JAHW050F and JAHW075F

Output Ripple Voltage at Room

Temperature and IO = IO, max

8-2486 (F)

Note: See Figure 17 for test conditions.

Figure 8. Typical JAHW100F Output Ripple Voltage

at Room Temperature and IO = IO, max

2OUTPUT CURRENT, IO (A)

EFFICIENCY, η (%)

46810357911 12 13 14 15

VI = 75 V

VI = 48 V

VI = 36 V

2OUTPUT CURRENT, IO (A)

EFFICIENCY, η (%)

46810357911 12 13 14 15

81 16 17 18 19 20

VI = 75 V

VI = 48 V

VI = 36 V

OUTPUT VOLTAGE, VO (V)

(20 mV/div)

TIME, t (1 µs/div)

VI = 36 V

VI = 48 V

VI = 75 V

OUTPUT VOLTAGE, VO (V)

(50 mV/div)

TIME, t (2 µs/div)

36 V

48 V

75 V

Data Sheet

March 2005

Tyco Electronics Corp. 7

dc-dc Converters; 36 to 75 Vdc Input, 3.3 Output; 33 W to 66 W

JAHW050F, JAHW075F, and JAHW100F Power Modules:

Characteristic Curves (continued)

8-2378 (F)

Note: Tested with a 10 µF aluminum and a 1.0 µF tantalum capacitor

across the load.

Figure 9. T ypical J AHW050F T ransient Response to

Step Decrease in L o ad from 50% to 25%

of Full Load at Room Temperature and

48 Vdc Input (Waveform Averaged to

Eliminate Ripple Component.)

8-2294 (F)

Note: Tested with a 10 µF aluminum and a 1.0 µF tantalum capacitor

across the load.

Figure 10. Typical JAHW075F Transient Response

to Step Decrease in Load from 50% to

25% of Full Load at Room Temperature

and 48 Vdc Input (Waveform A veraged to

Eliminate Ripple Component.)

8-2487 (F)

Note: Tested with a 10 µF aluminum and a 1.0 µF tantalum capacitor

across the load.

Figure 11. Typical JAHW100F Transient Response

to Step Decrease in Load from 50% to

25% of Full Load at Room Temperature

and 48 Vdc Input (W aveform Averaged to

Eliminate Ripple Component.)

8-2379 (F)

Note: Tested with a 10 µF aluminum and a 1.0 µF tantalum capacitor

across the load.

Figure 12. Typical JAHW050F Transient Response

to Step Increase in Load from 50% to

75% of Full Load at Room Temperature

and 48 Vdc Input (W aveform Averaged to

Eliminate Ripple Component.)

OUTPUT VOLTAGE, VO (V)

(100 mV/div)

TIME, t (50 µs/div)

OUTPUT CURRENT, IO (A)

(1 A/div)

2.5 A

OUTPUT VOLTAGE, V

(V)

(100 mV/div)

TIME, t (100

s/div)

OUTPUT CURRENT, I

(A)

(1 A/div)

3.75 A

OUTPUT CURRENT, IO (A)

(1 A/div)

TIME, t (50 µs/div)

10 A

5 A

OUTPUT VOLTAGE, VO (V)

(100 mV/div)

OUTPUT VOLTAGE, VO (V)

(10 mV/div)

TIME, t (50 µs/div)

OUTPUT CURRENT, IO (A)

(1 A/div)

5 A

88 Tyco Electronics Corp.

Data Sheet

March 2005

dc-dc Converters; 36 to 75 Vdc Input, 3.3 Output; 33 W to 66 W

JAHW050F, JAHW075F, and JAHW100F Power Modules:

Characteristic Curves (continued)

8-2295 (F)

Note: Tested with a 10 µF aluminum and a 1.0 µF tantalum capacitor

across the load.

Figure 13. Typical JAHW075F Transient Response

to Step Increase in Load from 50% to

75% of Full Load at Room Temperature

and 48 Vdc Input (Waveform A veraged to

Eliminate Ripple Component.)

8-2488 (F)

Note: Tested with a 10 µF aluminum and a 1.0 µF tantalum capacitor

across the load.

Figure 14. Typical JAHW075F Transient Response

to Step Increase in Load from 50% to

75% of Full Load at Room Temperature

and 48 Vdc Input (Waveform A veraged to

Eliminate Ripple Component.)

8-2296 (F)

Note: Tested with a 10 µF aluminum and a 1.0 µF tantalum capacitor

across the load.

Figure 15. JAHW075F Typic al Start-Up from

Remote On/Off; IO = IO, max

OUTPUT VOLTAGE, VO (V)

(100 mV/div)

TIME, t (100

s/div)

OUTPUT CURRENT, I

(A)

(1 A/div)

OUTPUT CURRENT, IO (A)

(1 A/div)

TIME, t (50 µs/div)

15 A

10 A

OUTPUT VOLTAGE, VO (V)

(100 mV/div)

REMOTE ON/OFF,

VON/OFF (V)

TIME, t (5 ms/div)

OUTPUT VOLTAGE, VO (V)

(1 V/div)

Tyco Electronics Corp. 9

Data Sheet

March 2005 dc-dc Converters; 36 to 75 Vdc Input, 3.3 Output; 33 W to 66 W

JAHW050F, JAHW075F, and JAHW100F Power Modules:

Test Configurations

8-203 (F).l

Note: Measure input reflected-ripple current with a simulated source

inductance (LTEST) of 12 µH. Capacitor CS offsets possible bat-

tery impedance. Measure current as shown above.

Figure 16. Input Reflected-Ripple Test Setup

8-513 (F).d

Note: Use a 1.0 µF ceramic capacitor and a 10 µF aluminum or tan-

talum capacitor. Scope measurement should be made using a

BNC socket. Position the load between 51 mm and 76 mm

(2 in. and 3 in.) from the module.

Figure 17. Peak-to-Peak Output Noise

Measurement Test Setup

8-749 (F)

Note: All measurements are taken at the module terminals. When

socketing, place Kelvin connections at module terminals to

avoid measurement errors due to socket contact resistance.

Figure 18. Output Voltage and Efficiency

Measurement Test Setup

Design Considerations

Input Sour ce Impedance

The power module should be connected to a low

ac-impedance input source. Highly inductive source

impedances can affect the stability of the power mod-

ule. For the test configuration in Figure 16, a 33 µF

electrolytic capacitor (ESR < 0.7 Ω at 100 kHz)

mounted close to the power module helps ensure sta-

bility of the unit. For other highly inductiv e source

impedances, consult the factory for further application

guidelines.

Output Capacitance

High output cu rrent tr ansient rate of change ( high di/dt)

loads may require high values of ou tp ut capa cita nce to

supply the instantaneous energy requirement to the

load. To minimize the output voltage transient drop dur-

ing this transient, low E.S.R. ( equivalent series resis-

tance) capacitors may be required, since a high E.S.R.

will produce a correspondingly higher voltage drop dur-

ing the current transient .

Output capacitance and load impedance interact with

the power module’s output volta ge regulation contro l

system and may produce and ‘unstable’ output condi-

tion for the required values of capacitance and E.S.R..

Minimum and maximum values of output capacitance

and of the capacitor’s associated E.S.R. may be dic-

tated, depending on the modules control system.

The process of determining the acceptable values of

capacitance and E.S.R. is complex and is load-depen-

dant. Tyco provides Web-based tools to assist the

pow er module end-user in apprai sing and adjusting the

effect of various load conditions and output capaci-

tances on specific power modules for various load con-

ditions.

1. Access the web at power.tycoelectronics.com/power

2. Under Products, click on the DC-DC link

3. Under Design Tools, click on Application Tools Download

4. Various design tools will be found, including tools for determining

stability of power module systems§.

§Not av a ilable for all co des, Where not availabl e , use minim um values in table

above

TO OSCILLOSCOPE

CURRENT

PROBE

BATTERY

LTEST

12 µH

CS 220 µF

ESR < 0.1 Ω

@ 20 °C, 100 kHz 33 µF

ESR < 0.7 Ω

@ 100 kHz

VI(+)

VI(–)

1.0 µFRESISTIVE

SCOPE

COPPER STRIP

10 µFLOAD

VO(+)

VO(–)

VI(+)

IIIO

SUPPLY

CONTACT

CONTACT AND

LOAD

SENSE(+)

VI(–)

VO(+)

VO(–)

SENSE(–)

RESISTANCE

DISTRIBUTION LOSSES

ηVO(+) – VO(–)[]IO

VI(+) – VI(–)[]II

------------------------------------------------





x 100 %=

1010 Tyco Electronics Corp.

Data Sheet

March 2005

dc-dc Converters; 36 to 75 Vdc Input, 3.3 Output; 33 W to 66 W

JAHW050F, JAHW075F, and JAHW100F Power Modules:

Safety Considerations

For safety-agency approval of the system in which the

power module is used, the power module must be

installed in complia nce with the spacing and separatio n

requirements of the end-use safety agency standard,

i.e., UL60950, CSA C22.2 No. 60950-00, and VDE

0805 (IEC60950, IEC950).

If the input source is non-SELV (ELV or a hazardous

voltage greater than 60 Vdc and less than or equal to

75 Vdc), for the module’s output to be considered

meeting the requ ire m en ts of safety extra-low voltage

(SELV), all of the follo wing must be true:

■The input source is to be provided with reinforced

insulation from any hazardous voltages, including the

ac mains.

■One VI pin and one VO pin are to be grounded, or

both the input and output pins are to be kept floating.

■The input pins of the module are no t operator acces-

sible.

■Another SELV reliability test is conducted on the

whole system, as requir ed by the saf ety agencies , on

the combination of supply source and the subject

module to verify that under a single fault, hazardous

voltages do not appear at the module’s output.

Note: Do not ground either of the input pins of the

module without g rounding one of the output pins.

This may allow a non-SELV voltage to appear

betwee n the output pin and ground.

The pow er modu le has extra -lo w v oltage (ELV) outputs

when all inputs are ELV.

The input to these un its is to be provided with a maxi-

mum 6 A nor m al- blow fuse in the ungrounded lead.

Feature Descriptions

Overcurrent Protection

To provide protection in an output overload condition,

the unit is provided with internal shutdown and auto-

restart mechanism .

At the instance of current-limit inception, the module

enters a "hiccup" mode of operation whereby it shuts

down and automatically attempts to restart. As long as

the fault pers ists, the mod ule rem a ins in this mo de.

The protecti on mechanism is such that the unit can

continue in this condition for a sufficient interval of time

until the fault is cleared.

A latch-off option is also available.

Remote On/Off

Two remote on/off op tions are available. Positive logic

remote on/off turns the module on during a logic-high

voltage on the ON/OFF pin, and off during a logic low.

Negative logic remote on/off turns the module off dur-

ing a logic high and on during a logic low. Negative

logic, device co de suffix “1,” is the factory-preferred

configuration.

To turn the power module on and off, the user must

supply a switch to control the voltage between the

on/off terminal and the VI(–) terminal (Von/off). The

switch can be an open collector or equivalent (see

Figure 19). A logic low is Von/off = 0 V to 1.2 V. The

maximum Ion/off during a logic low is 1 mA. The switch

should maintain a logic-low voltage while sinking 1 mA.

During a logic high, the maximum Von/off generated by

the power module is 15 V. The maximum allowable

leakage current of the switch at Von/off = 15 V is 50 µA.

If not using the remote on/ off feature , do one of the

f ollowing to turn the unit on:

■F or negativ e logic, short ON/OFF pin to VI(–).

■For positive logic, leave ON/OFF pin open.

8-720 (F).c

Figure 19. Remote On/ Off Implementation

Remote Sense

Remote sense minimizes the effects of distribution

losses by re gulating the voltage at the remote-sense

connections. The voltage between the remote-sense

pins and the output terminals must not exceed the out-

put voltage sense r ange gi ven in the Feature Spe c ifica-

tions table, i.e .:

[VO(+) – VO(–)] – [SENSE(+) – SENSE(–)] ≤ 0.5 V

SENSE(+)

VO(+)

SENSE(–)

VO(–)

VI(–)

–

Ion/off ON/OFF

VI(+)

LOAD

Von/off

Tyco Electronics Corp. 11

Data Sheet

March 2005 dc-dc Converters; 36 to 75 Vdc Input, 3.3 Output; 33 W to 66 W

JAHW050F, JAHW075F, and JAHW100F Power Modules:

Feature Descriptions (continued)

Remote Sense (continued)

The voltage between the VO(+) and VO(–) terminals

must not exceed the minimum output overvoltage shut-

down value indicat ed in the Feature Specifications

table. This limit includes any increase in voltage due to

remote-sense compensation and output voltage set-

point adjustment (trim). See Figure 20.

If not using the remote-sense feature to regulate the

output at the point of load, then connect SENSE(+) to

VO(+) and SENSE(–) to VO(–) at the module.

Although the output voltag e can be increased by bot h

the remote sense and by the trim, the maximum

increase for the output v oltage is not the sum of both.

The maximum increase is the larger of either the

remote sense or the trim. Consult the factory if you

need to increase the output voltage more than the

above limitation.

The amount of power delivered by the module is

defined as the volta ge at the output t erminals multiplied

by the output current. When using remote sense and

trim, the output voltage of the mo dule can be

increased, which at the same output current would

increase the power output of the module. Care should

be taken to ensure tha t the maximum output power of

the module remains at or below the maxim um rated

power.

8-651 (F). m

Figure 20. Effective Circuit Configuration for

Single-Module Remote-Sense Operation

Output Voltage Set-Point Adjustment

(Trim)

Output voltage trim allows the user to increase or

decrease the output v oltage set point of a module. This is

accomplished by connecting an external resistor between

the TRIM pin and either the SENSE(+) or SENSE(–) pins.

The trim resistor should be positioned close to the mod-

ule.

If not using the t rim feature, leave the TRIM pin open.

With an external resistor between the TRIM and

SENSE(–) pins (Radj-down), the output voltage set point

(VO, adj) decreases (see Figure 21). The follo wing equa-

tion determines the required external-resistor value to

obtain a percentage output voltage change of ∆%.

With an external resistor connecte d be t w ee n the TRIM

and SENSE(+) pins (Radj-up), the outp ut voltage set

point (VO, adj) increases (see Figure 22).

The following equation determines the required exter-

nal-resistor v alue to obtain a percentage output voltage

change of ∆%.

The voltage between the VO(+) and VO(–) terminals

must not exceed the minimum output overvoltage shut-

down value indicated in the Feature Specifications

table. This limit includes any increase in v olt age du e to

remote-sense compensation and output voltage set-

point adjustment (trim). See Figure 20.

Although the output volt age can be increased by both

the remote sense and by the trim, the maximum

increase for the output voltage is not the sum of both.

The maximum increase is the larger of either the

remote sense or the trim. Consult the factory if you

need to increase the out put voltag e more than the

above limitation.

The amount of power delivered by the module is

defined as the v oltage at the output terminals multiplied

by the output current. When using remote sense and

trim, the output voltage of the module can be

increased, which at the same output current would

increase the power output of the module. Care should

be taken to ensure that the maximum output power of

the module remains at or below the maximum rated

power.

SENSE(+)

SENSE(–)

VI(+)

VI(–)

IOLOAD

CONTACT AND

SUPPLY II

CONTACT

VO(+)

VO(–)

DISTRIBUTION LOSSESRESISTANCE

Radj-down 1000

∆%

-------------11–





kΩ=

Radj-up VO nom,()1∆%

100

--------+()1.225–

1.225∆%

--------------------------------------------------------------------------1000 11

–







kΩ=

1212 Tyco Electronics Corp.

Data Sheet

March 2005

dc-dc Converters; 36 to 75 Vdc Input, 3.3 Output; 33 W to 66 W

JAHW050F, JAHW075F, and JAHW100F Power Modules:

Feature Descriptions (continued)

Output Voltage Set-Point Adjustment

(Trim) (continued)

8-748 (F).b

Figure 21. Circuit Configuration to Decrease

Output Voltage

8-715 (F).b

Figure 22. Circuit Configuration to Increase

Output Voltage

Output Overvoltage Protection

To provide protection in an output overvo ltage condi-

tion, the unit is equipped with circuitry that moonitors

the v oltage on the oup ut terminals. If the v oltage on the

output terminals exceed the overvoltage protection

threshold, the module enters a hiccup mode of opera-

tion whereb y it shuts down and automaticall attempts to

restart. As long as the fault persists, the module

remains in this mode.

The protecti on mechanism is such that the unit can

continue in this condition until the fault is cleared.

A latch-off option is also available.*

*Protection latch-off causes the ouput to be disabled until input

power is recyeled or until the remote on-off is recycled off-on.

Overtemperature Protection

To provide protection in a overtemperature condition,

the unit is equipped with an overtemperature circuit. I n

the event of such a fault, the mod u le en te rs into a hic-

cup mode of operation whereby it shuts down and

automatically attempts to restart. As long as the fault

persists, the module remains in this mode.

The protection mechanism is such that the unit can

continue in this condition until the fault is cleared.

A latcho-off option is also available.*

Thermal Considerations

Introduction

The power modules operate in a variety of thermal

environments; however, sufficient cooling should be

provided to help ensure reliable operation of the unit.

Heat-dissipating components inside the unit are ther-

mally coupled to the case. Heat is removed by conduc-

tion, conv ection, and radiation to the surrounding

environment. Proper cooling can be verified by mea-

suring the case temperature. Peak temperatur e (TC)

occurs at the position indicated in Figure 23.

8-716 (F).h

Note: Top view, pin locations are for reference only. Measurements

shown in millimeters and (inches).

Figure 23. Case Temperature Measurement

Location

The temperature at this location should not excee d

100 °C. The output power of the module should not

exceed the rated power for the module as listed in the

Ordering Information table.

Although the maximum case temperature of the power

modules is 100 °C, you can limit this temperature to a

lower value for extremely high reliability.

(+)

VI(–)

ON/OFF

CASE

VO(+)

VO(–)

SENSE(+)

TRIM

SENSE(–) Radj-down RLOAD

(+)

VI(–)

ON/OFF

CASE

VO(+)

VO(–)

SENSE(+)

TRIM

SENSE(–)

Radj-up RLOAD

MEASURE CASE

ON/OFF

CASE

+ SEN

TRIM

– SEN

29.0

(1.14)

30.5

TEMPERATURE HERE

VO(+)

VO(–)

VI(+)

VI(–)

(1.20)

Tyco Electronics Corp. 13

Data Sheet

March 2005 dc-dc Converters; 36 to 75 Vdc Input, 3.3 Output; 33 W to 66 W

JAHW050F, JAHW075F, and JAHW100F Power Modules:

Thermal Considerations (continued)

Heat Transfer Without Heat Sinks

Increasing airflow over the module enhances the heat

transfer via convection. Figure 24 shows the maximum

power that can be dissipated b y the module without

e xceeding the maximum case te mperature v ersus local

ambient temperature (TA) for natural convection

through 4 m/s (800 ft./min.).

Note that the natu ral convection condition was mea-

sured at 0.05 m/s to 0.1 m/s (10 ft./min. to 20 ft./min.);

however, systems in which these pow er modules may

be used typically generate natural convection airflow

rates of 0.3 m/s (60 ft./m in.) due to ot he r he at di ssip at -

ing components in the system. The use of Figure 24 is

shown in the following example.

Example

What is the minimum airflow necessary for a

JAHW100F operating at VI = 48 V, an output current of

20 A, and a maximum ambient temperature of 55 °C?

Solution

Given: VI = 48 V

IO = 20 A

TA = 55 °C

Determine P D (Use Figure 27.):

PD = 8.0 W

Determine airflow (v) (Use Figure 24.):

v = 0.51 m/s (100 ft./ min.)

8-2504 (F)

Figure 24. Forc ed Convection P ower Derating with

No Heat Sink; Either Orientation

8-3355 (F)

Figure 25. JAHW050F Power Dissi pation vs.

Output Current at 25 °C

8-3356 (F)

Figure 26. JAHW075F Power Dissi pation vs.

Output Current at 25 °C

8- 3357 (F)

Figure 27. JAHW100F Power Dissi pation vs.

Output Current at 25 °C

10 20 30 40 50 60

LOCAL AMBIENT TEMPERATURE, TA (°C)

1000

70 80

NATURAL

CONVECTION

1.0 m/s (200 ft./min.)

2.0 m/s (400 ft./min.)

3.0 m/s (600 ft./min.)

4.0 m/s (800 ft./min.)

POWER DISSIPATION, PD (W)

OUTPUT CURRENT, IO (A)

POWER DISSIPATION, PD (W)

012345678910

VI = 36 V

VI = 48 V

VI = 75 V

OUTPUT CURRENT, I

(A)

POWER DISSIPATION, P

(W)

12345678910

011 12 13 14 15

= 75 V

= 48 V

= 36 V

OUTPUT CURRENT, I

(A)

POWER DISSIPATION, P

(W)

2 4 6 8 101214161820

= 75 V

= 48 V

= 36 V

1414 Tyco Electronics Corp.

Data Sheet

March 2005

dc-dc Converters; 36 to 75 Vdc Input, 3.3 Output; 33 W to 66 W

JAHW050F, JAHW075F, and JAHW100F Power Modules:

Thermal Considerations (continued)

Heat Transfer with Heat Sinks

The power modules have thr ough-threaded, M3 x 0.5

mounting holes , which enab le heat sinks or cold plate s

to attach to the module. The mo unting torque must not

exceed 0.56 N-m (5 in.-lb.).

Thermal derating with heat sinks is e xpressed by using

the overall thermal resistance of the module . Total

module thermal resistance (θca) is defin ed as the max-

imum case temperature rise (∆TC, max) divided by the

module power dissipation (PD):

The location to measure case temperature (TC) is

shown in Figure 23. Case-to-ambient thermal resis-

tance vs. airflow is shown, for various heat sink config-

uration s and heights, in Figure 28. These curves were

obtained by experimental testing of heat sinks, which

are offered in the product catalo g.

8-2505 (F)

Figure 28. Case-to-Ambient Thermal Resistan ce

Curves; Either Orientation

These measured resistances are from heat transfer

from the sides and bot tom of the m odule as we ll as the

top side with the attached heat sink; therefore, the

case-to-ambient thermal resistances shown are gener-

ally lower than the resistance of t he heat sink by itself.

The module used to collect the data in Figure 28 had a

thermal-conductive dry pad between the case and the

heat sink to minimize contact resistance. The use of

Figure 28 is shown in the following example .

Example

If an 85 °C case temperature is desired, what is the

minimum airflow necessary? Assume the JAHW100F

module is operating at VI = 48 V and an output current

of 20 A, maximum ambient air tempera ture of 55 °C,

and the heat sink is 1/ 4 inch.

Solution

Given: VI = 48 V

IO = 20 A

TA = 55 °C

TC = 85 °C

Heat sink = 1/4 inch

Determine P D by using Figure 27:

PD = 8.0 W

Then solv e the follo wing equation:

Use Figure 28 to determine air velocity for the 1/4 inch

heat sink.

The minimum airflow necessary for the JAHW100F

module is 1.12 m/s (220 ft./min.).

Custom Heat Sinks

A more detailed model can be used to determine the

required ther mal resistance of a heat sink to provide

necessary cooling. The total module resistance can be

separated into a resistance from case-to-sink ( θcs) and

sink-to-ambient (θsa) as shown in Figure 29.

8-1304 (F).e

Figure 29. Resistance from Case-to-Sink and

Sink-to-Ambient

θca ∆TCmax,

---------------------TCTA–()

------------------------

0.5

(100) 1.0

(200) 1.5

(300) 2.0

(400) 2.5

(500) 3.0

(600)

0.0

(0) AIR VELOCITY, m/s (ft./min.)

CASE-TO-AMBIENT THERMAL

RESISTANCE, θCA (°C/W)

1 IN. HEAT SINK

1 1/2 IN. HEAT SINK

1/2 IN. HEAT SINK

1/4 IN. HEAT SINK

NO HEAT SINK

θca TCTA–()

------------------------

θca 85 55–()

8.0

------------------------

θca 3.75 °C/W=

PDTCTSTA

θcs θsa

Tyco Electronics Corp. 15

Data Sheet

March 2005 dc-dc Converters; 36 to 75 Vdc Input, 3.3 Output; 33 W to 66 W

JAHW050F, JAHW075F, and JAHW100F Power Modules:

Thermal Considerations (continued)

Custom Heat Sinks (continued)

For a managed interface using thermal grease or foils,

a value of θcs = 0.1 °C/W to 0.3 °C/W is typical. The

solution for heat sink resistance is:

This equation assumes that all dissipated power must

be shed by the heat sink. Depending on the user-

defined application environme nt, a more accurate

model, including heat transfer from the sides and bot-

tom of the module, can be used. This equation pro-

vides a conservative estimate for such instances.

EMC Considerations

For assistance with designing for EMC compliance,

please refer to the FLTR100V10 data sheet

(DS99-294EPS).

Layout Considerations

Copper paths must not be routed beneath the power

module mounting inserts. For additional layout guide-

lines, refer to the FLTR100V10 data sheet

(DS99-294EPS).

θsa TCTA–()

-------------------------θcs–=

16 Tyco Electronics Corp.

Data Sheet

March 2005

dc-dc Converters; 36 to 75 Vdc Input, 3.3 Output; 33 W to 66 W

JAHW050F, JAHW075F, and JAHW100F Power Modules:

Outline Diagram

Dimensions are in millimeters and (inches).

Tolerances: x.x mm ± 0.5 mm (x.xx in. ± 0.02 in.)

x.xx mm ± 0.25 mm (x.xxx in. ± 0.010 in.)

Top View

Side View

Bottom View

8-716 (F).m

* Side label includes Tyco name, product designation, safety agency markings, input/output voltage and current ratings, and bar code.

† The case pin is 5.4 (0.21), i.e., 1.3 (0.05) longer than the other pins.

57.9 (2.28)

61.0

(2.40)

SIDE LABEL*

0.51 (0.020)

12.7 (0.50)

1.02 (0.040) DIA

SOLDER-PLATED

BRASS, 7 PLACES

4.2 (0.17)†

2.06 (0.081) DIA

SOLDER-PLATED BRASS,

2 PLACES (– OUTPUT AND

+ OUTPUT)

48.3 (1.90)

10.16

(0.400)

MOUNTING INSERT S

M3 x 0.5 THROUGH,

4 PLACES

10.16

(0.400)

5.1 (0.20)

12.7 (0.50)

4.7

(0.19)

48.26 (1.900)

STANDOFF,

4 PLACES

7.1 (0.28)

7.1

(0.28)

17.78

(0.700)25.40

(1.000)35.56

(1.400)

25.40

(1.000)

50.8

(2.00)

35.56

(1.400)

VI(–)

CASE

ON/OFF

VI(+)

VO(–)

VO(+)

–SEN

TRIM

+SEN

Tyco Electronics Corp. 17

Data Sheet

March 2005 dc-dc Converters; 36 to 75 Vdc Input, 3.3 Output; 33 W to 66 W

JAHW050F, JAHW075F, and JAHW100F Power Modules:

Recommended Hole Pattern

Component-side footprint.

Dimensions are in millimeters and (inches).

8-716 (F).m

Ordering Information

Table 4. Device Codes

Optional f eature s can be ordered using the suffix es sho wn in Tab le 5. The suffixes f ollo w the last le tter of the device

code and are placed in descending order. For example, the device codes for a JAHW075F module with the follow-

ing options are shown below:

Positive logic JAHW075F

Negative logic JAHW075F1

Table 5. Device Options

Input

Voltage Output

Power Remote On/Off

Logic Device

Code Comcode

48 V 3.3 V 33 W Negative JAHW050F1 108288448

48 V 3.3 V 50 W Negative JAHW075F1 108219320

48 V 3.3 V 66 W Negative JAHW100F1 108064510

48 V 3.3 V 33 W Positive JAHW050F 108866245

48 V 3.3 V 50 W Positive JAHW075F 108489089

48 V 3.3 V 66 W Positive JAHW100F 108626102

Option Suffix

Negative remote on/off logic 1

Positive remote on/off logic —

Approved for Basic Insulation -B

Latching Protection 5

10.16

(0.400)

10.16

(0.400)

12.7 (0.50)

4.7

(0.19)

MODULE OUTLINE

5.1 (0.20)

48.26 (1.900)

TERMINALS

48.3 (1.90)

MOUNTING HOLES

57.9 (2.28)

50.8

(2.00) 25.40

(1.000)

35.56

(1.400)

61.0

(2.40)

35.56

(1.400)

25.40

(1.000)

17.78

(0.700)

TRIM

VI(+)

ON/OFF

CASE −SEN

+SEN

VO(+)

VI(−)VO(−)

1818 Tyco Electronics Corp.

Data Sheet

March 2005

dc-dc Converters; 36 to 75 Vdc Input, 3.3 Output; 33 W to 66 W

JAHW050F, JAHW075F, and JAHW100F Power Modules:

Ordering Information (continued)

Table 6. Device Ac cessories

Dimensions are in millimeters and (inches).

8-2832 (F)

Figure 30. Longitudinal Heat Sink

8-2833 (F)

Figure 31. Transverse Heat Sink

Accessory Comcode

1/4 in. transverse kit (heat sink, thermal pad, and screws) 407243989

1/4 in. longitudinal kit (heat sink, thermal pad, and screws) 407243997

1/2 in. transverse kit (heat sink, thermal pad, and screws) 407244706

1/2 in. longitudinal kit (heat sink, thermal pad, and screws) 407244714

1 in. transverse kit (heat sink, thermal pad, and screws) 407244722

1 in. longitudinal kit (hea t sink, thermal pad, and screws) 407244730

1 1/2 in. transverse kit (heat sink, thermal pad, and screws) 407244748

1 1/2 in. longitudinal kit (heat sink, thermal pad, and screws) 407244755

1/4 IN.

1/2 IN.

1 IN.

1 1/2 IN.

57.9

(2.4)

(2.28)

1/4 IN.

1/2 IN.

1 IN.

1 1/2 IN.

57.9

(2.28)

(2.4)

Tyco Electronics Corp. 19

Data Sheet

March 2005 dc-dc Converters; 36 to 75 Vdc Input, 3.3 Output; 33 W to 66 W

JAHW050F, JAHW075F, and JAHW100F Power Modules:

Notes

Data Sheet

March 2005

dc-dc Converters; 36 to 75 Vdc Input, 3.3 Output; 33 W to 66 W

JAHW050F, JAHW075F, and JAHW100F Power Modules:

Tyco Electronics Power Systems, Inc.

3000 Skyline Drive, Mesquite, TX 75149, USA

+1-800-526-7819 FAX: +1-888-315-5182

(Outside U.S.A.: +1-972-284-2626, FAX: +1-972-284-2900)

http://power.tycoelectronics.com

Tyco Electronics Corporation reserves the right to make changes to the product(s) or information contained herein without notice. No liability is assumed as a result of their use or application.

No rights under any patent accompany the sale of any such product(s) or information.

Printed in U.S.A.

March 2005

FDS01-012EPS (Replaces DS00-327EPS & DS00-231EPS) Printed on

Recycled Paper