JNW350R41-18TZ - GE Critical Power

Data Sheet

May 5, 2010

JNW350R Series Power Modules; DC-DC Converters

36-75 Vdc Input; 28Vdc Output; 350W Output

* 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.

** ISO is a registered trademark of the International Organization of Standards

Document No: PDS08-005 ver 1.4

PDF name: jnw350r.ds.pdf

Features

 Compliant to RoHS EU Directive 2002/95/EC (-Z

versions)

 Compliant to ROHS EU Directive 2002/95/EC with

lead solder exemption (non-Z versions)

 Compliant to IPC-9592, Class I, Category 2

 High power density: 129 W/in3

 Industry standard half-brick pin-out

 Low output ripple and noise

 Industry standard half-brick footprint

57.7mm x 60.7mm x 12.7mm

(2.27” x 2.39” x 0.5”)

 Remote Sense

 2:1 input voltage range

 Single tightly regulated output

 Constant switching frequency

 Accepts transient overloads without shutdown

 Latch after output OVP/OCP fault shutdown

 Over temperature protection, auto restart

 Output voltage adjustment trim, 16.8Vdc to 32.0Vdc

 Wide operating case temperature range (-40°C to

100°C)

 CE mark meets 2006/95/EC directives§

 UL60950-1/CSA† C22.2 No. 60950-1-03 Certified

(CCSAUS) and VDE‡ 0805:2001-12 (EN60950-1)

Licensed

 ISO** 9001 and ISO 14001 certified manufacturing

facilities

Applications

 RF Power Amplifier

 Wireless Networks

 Switching Networks

Options

 Output OCP auto restart

 Shorter pins

 Unthreaded heatsink holes

 Tunable Loop™ for transient response

optimization

Description

The JNW350R series of dc-dc converters are a new generation of isolated DC/DC power modules providing up to

350W output power in an industry standard half-brick size footprint, which makes it an ideal choice for high voltage

and high power applications. Threaded-through holes are provided to allow easy mounting or addition of a heatsink

for high-temperature applications. The output is fully isolated from the input, allowing versatile polarity configurations

and grounding connections. This module contains an optional new feature, the Tunable LoopTM, that allows the user

to optimize the dynamic response of the converter to match the load with reduced amount of output capacitance,

leading to savings on cost and PWB area.

RoHS Compliant

Data Sheet

May 5, 2010 JNW350R Power Modules; DC-DC Converters

36 – 75 Vdc Input; 28Vdc Output; 350W Output

LINEAGE POWER 2

Absolute Maximum Ratings

Stresses in excess of the absolute maximum ratings can cause permanent damage to the device. These are

absolute stress ratings only, functional operation of the device is not implied at these or any other conditions in

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

extended periods can adversely affect the device reliability.

Parameter Device Symbol Min Max Unit

Input Voltage

Continuous All VIN -0.3 80 Vdc

Transient, operational (100 ms) All VIN,trans -0.3 100 Vdc

Operating Ambient Temperature

Note: When the operating ambient temperature is within

55°C ~85°C, the application of the module refers to the

deratin

curves of Fi

ures 21 and 22.

All Ta -40 85 °C

Operating Case Temperature

(See Thermal Considerations section, Figure 20) All Tc -40 100 °C

Storage Temperature All Tstg -55 125 °C

I/O Isolation Voltage: Input to Case, Input to Output All   1500 Vdc

Output to Case All   500 Vdc

Electrical Specifications

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

conditions.

Parameter Device Symbol Min Typ Max Unit

Operating Input Voltage

(see Figure 12 for VIN, min when using trim-up feature) All VIN 36 48 75 Vdc

Maximum Input Current

(VIN=36V to 75V, IO=IO, max) All IIN,max 12.5 Adc

Inrush Transient All I2t 2 A2s

Input Reflected Ripple Current, peak-to-peak

(5Hz to 20MHz, 12H source impedance; VIN=0V to 75V,

IO= IOmax ; see Figure 7)

All 20 mAp-p

Input Ripple Rejection (120Hz) All 50 dB

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

This power module can be used in a wide variety of applications, ranging from simple standalone operation to being

an integrated part of complex power architecture. To preserve maximum flexibility, internal fusing is not included.

Always use an input line fuse, to achieve maximum safety and system protection. The safety agencies require a

time-delay or fast-acting fuse with a maximum rating of 20 A (see Safety Considerations section). Based on the

information provided in this data sheet on inrush energy and maximum dc input current, the same type of fuse with a

lower rating can be used. Refer to the fuse manufacturer’s data sheet for further information.

Data Sheet

May 5, 2010 JNW350R Power Modules; DC-DC Converters

36 – 75 Vdc Input; 28Vdc Output; 350W Output

LINEAGE POWER 3

Electrical Specifications (continued)

Parameter Device Symbol Min Typ Max Unit

Output Voltage Set-point

(VIN=VIN,nom, IO=IO, max, Tc =25°C)

All

VO, set 27.5 28 28.5 Vdc

Output Voltage

(Over all operating input voltage, resistive load,

and temperature conditions until end of life)

All

VO 27.15  28.85 Vdc

Output Regulation

Line (VIN=VIN, min to VIN, max) All

 0.1 0.2 %Vo,set

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

 0.1 0.2 %Vo,set

Temperature (Tc = -40ºC to +100ºC) All  0.25 0.5 %Vo,set

Output Ripple and Noise on nominal output

(VIN=VIN, nom and IO=IO, min to IO, max)

RMS (5Hz to 20MHz bandwidth) All  45 55 mVrms

Peak-to-Peak (5Hz to 20MHz bandwidth) All  80 200 mVpk-pk

External Capacitance (ESR > 50 m)1 All, except

-T CO 440 6500 F

Without the Tunable Loop™ (ESRMAX = 80m)1 -T CO 440 470 F

With the Tunable Loop™ (ESR > 50 m)2 -T CO 440 8,000 F

Output Current All Io 1.0 12.5 Adc

Output Current Limit Inception All IO, lim 13.1  17.5 Adc

Output Short Circuit Current (VO 0.25Vdc) All IO, sc 30 Arms

Efficiency

VIN=VIN, nom, Tc=25°C IO=IO, max , VO= VO,set All   92  %

Switching Frequency fsw  300  kHz

Dynamic Load Response

(Io/t=1A/10s; Vin=Vin,nom; Tc=25°C;

Tested with a 470 F aluminum and a 10 µF

ceramic capacitor across the load.)

Load Change from Io= 50% to 75% of Io,max:

Peak Deviation

Settling Time (Vo<10% peak deviation)

All Vpk



1.5



%VO, set

Load Change from Io= 25% to 50% of Io,max:

Peak Deviation

Settlin

Time

(

Vo<10% peak deviation

)

Vpk



1.5



%VO, set

1 Note: use a minimum 2 x 220uF output capacitor. Recommended capacitor is Nichicon CD series, 220uF/35V. If the ambient

temperature is less than 0°C, use 3x of the minimum CO.

2 External capacitors may require using the new Tunable Loop™ feature to ensure that the module is stable as well as getting the

best transient response. See the Tunable Loop™ section for details.

Isolation Specifications

Parameter Symbol Min Typ Max Unit

Isolation Capacitance Ciso  15000  pF

Isolation Resistance Riso 10   M

General Specifications

Parameter Device Symbol Min Typ Max Unit

Calculated Reliability based upon Telcordia SR-

332 Issue 2: Method I Case 3 (IO=80%IO, max,

TA=40°C, airflow = 200 lfm, 90% confidence)

All

FIT 379 109/Hours

MTBF 2,638,332 Hours

Weight All

 78  g

2.8 oz.

Data Sheet

May 5, 2010 JNW350R Power Modules; DC-DC Converters

36 – 75 Vdc Input; 28Vdc Output; 350W Output

LINEAGE POWER 4

Feature Specifications

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

conditions. See Feature Descriptions for additional information.

Parameter Device Symbol Min Typ Max Unit

Remote On/Off Signal Interface

(VIN=VIN, min to VIN, max ; open collector or equivalent,

Signal referenced to VIN- terminal)

Negative Logic: device code suffix “1”

Logic Low = module On, Logic High = module Off

Positive Logic: No device code suffix required

Logic Low = module Off, Logic High = module On

Logic Low - Remote On/Off Current All Ion/off   1.0 mA

Logic Low - On/Off Voltage All Von/off 0  1.2 Vdc

Logic High Voltage – (Typ = Open Collector) All Von/off  5 Vdc

Logic High maximum allowable leakage current All Ion/off   50 A

Turn-On Delay and Rise Times

(Vin=Vin,nom, IO=IO, max, Tc=25C)

Case 1: Tdelay = Time until VO = 10% of VO,set from

application of Vin with Remote On/Off set to ON,

All Tdelay 85 ms

Case 2: Tdelay = Time until VO = 10% of VO,set from

application of Remote On/Off from Off to On with Vin

already applied for at least one second.

All

Tdelay  25 30 ms

Trise = time for VO to rise from 10% of VO,set to 90%

of VO,set.

All

Trise  25  ms

Output Voltage Overshoot 3 % VO, set

(IO=80% of IO, max, Tc =25°C)

Output Voltage Adjustment

(See Feature Descriptions):

Output Voltage Remote-sense Range

(only for No Trim or Trim down application ) All Vsense __

2 %Vo,nom

Output Voltage Set-point Adjustment Range (trim) All Vtrim 16.8

32.0 Vdc

Output Overvoltage Protection All VO, limit 34  38 Vdc

Over Temperature Protection All Tref  110  °C

(See Feature Descriptions)

Input Under Voltage Lockout VIN, UVLO

Turn-on Threshold All 35 36 Vdc

Turn-off Threshold All 31 32 Vdc

Hysteresis All 3 Vdc

Input Over voltage Lockout VIN, OVLO

Turn-on Threshold All  79.5 81 Vdc

Turn-off Threshold All 81 83  Vdc

Hysteresis All

--- 3 --- Vdc

Data Sheet

May 5, 2010 JNW350R Power Modules; DC-DC Converters

36 – 75 Vdc Input; 28Vdc Output; 350W Output

LINEAGE POWER 5

Characteristic Curves

The following figures provide typical characteristics for the JNW350R (28V, 18A) at 25ºC. The figures are identical for

either positive or negative Remote On/Off logic.

EFFICIENCY (%)

0 2.5 5 7.5 10 12.5

Vin=36

Vin=48

Vin=75

/Off

LTA

UTPUTV

LTA

VON/OFF(V) (2V/div) VO (V) (10V/div)

OUTPUT CURRENT, Io (A) TIME, t (20ms/div)

Figure 1. Converter Efficiency ver sus Ou tput

Current. Figure 4. Typical Start-Up Using negative Remote

On/Off; Co,ext = 470µF.

OUTPUT VOLTAGE

VO (V) (50mV/div)

INPUT VOLTAGE OUTPUT VOLTAGE

Vin (V) (20V/div) VO(V) (10V/div)

TIME, t (1s/div) TIME, t (20ms/div)

Figure 2. Typical Output Ripple and Noise at Room

Temperature and 48Vin; Io = Io,max; Co,ext = 470µF. Figure 5. Typical Start-Up from VIN, on/off enabled

prior to VIN step; Co,ext = 470µF.

OUTPUT CURRENT OUTPUT VOLTAGE

IO (A) (5A/div) VO(V) (200mV/div)

OUTPUT CURRENT OUTPUT VOLTAGE

IO (A) (5A/div) VO(V) (200mV/div)

TIME, t (1ms/div) TIME, t (1ms/div)

Figure 3. Standard JNW35 0R Transie nt Res ponse to

Dynamic Load Change from 25% to 50% to 25% of

Full Load at Room Temperature and 48 Vdc Input;

0.1A/uS, Co

ext = 470

Figure 6. Standard JNW350R Tran sient Response to

Dynamic Load Change from 50% to 75% to 50% of

Full Load at Room Temperature and 48 Vdc Input;

0.1A/uS, Co

ext = 470

Data Sheet

May 5, 2010 JNW350R Power Modules; DC-DC Converters

36 – 75 Vdc Input; 28Vdc Output; 350W Output

LINEAGE POWER 6

Test Configurations

Note: Measure the input reflected-ripple current with a

simulated source inductance (LTEST) of 12 µH. Capacitor

CS offsets possible battery impedance. Measure the current,

as shown above.

Figure 7. Input Reflected Ripple Current Test

Setup.

Note: Use a Cout (470 µF Low ESR aluminum or tantalum

capacitor typical), a 0.1 µF ceramic capacitor and a 10 µF

ceramic capacitor, and 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 8. Output Ripple and Noise Test Setup.

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 9. Output Voltage and Efficiency Test

Setup.

Design Considerations

Input Source Impedance

The power module should be connected to a low

ac-impedance source. A highly inductive source

impedance can affect the stability of the power

module. For the test configuration in Figure 7, a

470F Low ESR aluminum capacitor, CIN , mounted

close to the power module helps ensure the stability

of the unit. Consult the factory for further application

guidelines

Output Capacitance

The JNW350R power module requires a minimum

output capacitance of 440µF Low ESR aluminum

capacitor, Cout to ensure stable operation over the full

range of load and line conditions, see Figure 8. If the

ambient temperature is under -20C, it is required to

use at least 3 pcs of minimum capacitors in parallel.

In general, the process of determining the acceptable

values of output capacitance and ESR is complex and

is load-dependant.

Safety Considerations

For safety-agency approval of the system in which the

power module is used, the power module must be

installed in compliance with the spacing and

separation requirements of the end-use safety agency

standard, i.e., UL60950-1, CSA C22.2 No. 60950-1-

03, EN60950-1 and VDE 0805:2001-12.

For end products connected to –48V dc, or –60Vdc

nominal DC MAINS (i.e. central office dc battery

plant), no further fault testing is required. *Note: -60V

dc nominal battery plants are not available in the U.S.

or Canada.

For all input voltages, other than DC MAINS, where

the input voltage is less than 60V dc, if the input

meets all of the requirements for SELV, then:

 The output may be considered SELV. Output

voltages will remain within SELV limits even with

internally-generated non-SELV voltages. Single

component failure and fault tests were performed

in the power converters.

 One pole of the input and one pole of the output

are to be grounded, or both circuits are to be kept

floating, to maintain the output voltage to ground

voltage within ELV or SELV limits. However,

SELV will not be maintained if VI(+) and VO(+)

are grounded simultaneously.

Data Sheet

May 5, 2010 JNW350R Power Modules; DC-DC Converters

36 – 75 Vdc Input; 28Vdc Output; 350W Output

LINEAGE POWER 7

Safety Considerations (continued)

For all input sources, other than DC MAINS, where

the input voltage is between 60 and 75V dc

(Classified as TNV-2 in Europe), the following must

be meet, if the converter’s output is to be evaluated

for SELV:

 The input source is to be provided with reinforced

insulation from any hazardous voltage, including

the ac mains.

 One Vi pin and one Vo pin are to be reliably

earthed, or both the input and output pins are to

be kept floating.

 Another SELV reliability test is conducted on the

whole system, as required by the safety

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.

All flammable materials used in the manufacturing of

these modules are rated 94V-0, or tested to the

UL60950 A.2 for reduced thickness.

The input to these units is to be provided with a

maximum 20 A fast-acting or time-delay fuse in the

unearthed lead.

Feature Description

Remote On/Off

Two remote on/off options are available. Positive logic

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, device code suffix “1”, turns the

module off during a logic high and on during a logic

low.

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

supply a switch (open collector or equivalent) to

control the voltage (Von/off) between the ON/OFF

terminal and the VIN(-) terminal (see Figure 10). Logic

low is 0V  Von/off  1.2V. The maximum Ion/off during a

logic low is 1mA, the switch should be maintain a

logic low level whilst sinking this current.

During a logic high, the typical maximum Von/off

generated by the module is 5V, and the maximum

allowable leakage current at Von/off = 5V is 50A.

If not using the remote on/off feature:

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

For negative logic, short the ON/OFF pin to VIN(-).

Figure 10. Circuit configuration for using Remote

On/Off Implementation.

Overcurrent Protection

To provide protection in a fault output overload

condition, the module is equipped with internal current

limiting protection circuitry, and can endure

overcurrent transient overloads depending upon the

duration and amplitude of the overload. An internal

buffer measures the relative product of the duration

and amplitude of the overload and allows operation

until a limit threshold is reached. For lower amplitude

overloads, the module will operate without shutdown

for a longer transient overload. If the overload

amplitude is larger, the module will reach shutdown in

a shorter period of time.

A latching shutdown option is standard. If overcurrent

persists for beyond the overload buffer, the module

will

shut down and remain off until the module is reset by

either cycling the input power or by toggling the on/off

pin for one second.

An auto-restart option (4) is also available in a case

where an auto recovery is required. If overcurrent

persists for few milli-seconds, the module will shut

down and auto restart until the fault condition is

corrected. If the output overload condition still exists

when the module restarts, it will shut down again. This

operation will continue indefinitely, until the

overcurrent condition is corrected.

Over Voltage Protection

The output overvoltage protection consists of circuitry

that monitors the voltage on the output terminals. If

the voltage on the output terminals exceeds the over

voltage protection threshold, then the module will

shutdown and latch off. The overvoltage latch is reset

by either cycling the input power for one second or by

toggling the on/off signal for one second. The

protection mechanism is such that the unit can

continue in this condition until the fault is cleared.

An auto-restart is also available upon special request,

in a case where an auto recovery is required.

Data Sheet

May 5, 2010 JNW350R Power Modules; DC-DC Converters

36 – 75 Vdc Input; 28Vdc Output; 350W Output

LINEAGE POWER 8

Feature Description (continued)

Remote sense

Remote sense minimizes the effects of distribution

losses by regulating the voltage at the remote-sense

connection (see Figure 11). For No Trim or Trim down

application, the voltage between the remote-sense pin

and the output terminal must not exceed the output

voltage sense range given in the Feature

Specifications table i.e.: SENSE(+) – Vo(+)  2% of

Vo,nom.

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 voltage due to remote-sense compensation and

output voltage set-point adjustment (trim). See Figure

11. Do not connect SENSE(-) to the Vo(-) or Rload(-) as

there is a 0 connection internal to the module. If not

using the remote-sense feature to regulate the output

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

Although the output voltage 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. The amount of power

delivered by the module is defined as the voltage 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.

Figure 11. Effective Circuit Configuration for

Single-Module Remote-Sense Operation Output

Voltage.

Output Voltage Programming

Trimming allows the user to increase or decrease the

output voltage set point of a module. The trim resistor

should be positioned close to the module. Certain

restrictions apply to the input voltage lower limit when

trimming the output voltage to the maximum. See

Figure 12 for the allowed input to output range when

using trim. If not using the trim down feature, leave

the TRIM pin open.

35 40 45 50 55 60 65 70 75

Vin (V)

Vout (V)

Upper Trim Limit

Lower Trim Limit

Figure 12. Output voltage trim limits vs. In put

Voltage.

Modules without the –T Option

Trim Down – Decrease Output Voltage

Trimming down is accomplished by connecting an

external resistor between the TRIM pin and the

SENSE(-) pin. With an external resistor (Radj-down)

between the TRIM and SENSE(-) pins, the output

voltage set point (Vo,adj) decreases (see Figure 13).

The following equation determines the required

external-resistor value to obtain a percentage output

voltage change of %.

For output voltages : 28V

















kR downadj 2

100

Where,

100% ,

,



 nomo

desirednomo

VVV

Vdesired = Desired output voltage set point (V).

Figure 13. Circuit Configuration to Decrease

Output Voltage, Standard JNW350R.

Trim Up – Increase Output Voltage

Trimming up is accomplished by connecting external

resistor between the SENSE(+) pin and TRIM

pin.With an external resistor (Radj-up) connected

between the SENSE(+) and TRIM pins, the output

voltage set point (Vo,adj) increases (see Figure 14).

Data Sheet

May 5, 2010 JNW350R Power Modules; DC-DC Converters

36 – 75 Vdc Input; 28Vdc Output; 350W Output

LINEAGE POWER 9

Feature Description (continued)

The following equation determines the required

external-resistor value to obtain a percentage output

voltage change of %.

For output voltages: 28V



























k

RnomO

upadj %%)2(100(

%225.1

%)100(

Where,

100% ,

,



 nomo

nomodesired

VVV

Vdesired = Desired output voltage set point (V).

Figure 14. Circ ui t Confi gu rati on to In c reas e

Output Voltage, Standard JNW350R.

Examples:

To trim down the output of a nominal 28V module to

16.8V

100

28 8.1628

%



 VVV

% = 40













kR downadj 2

100

Radj - down = 0.5 k

To trim up the output of a nominal 28V module to

30.8V

100

28 288.30

%



 VVV

% = 10























kR upadj 10 )102(100(

10225.1 )10100(28

Radj - up = 239.4 k

Modules with the –T Opti on

Trim Down – Decrease Output Voltage

With an external resistor (Radj-down) between the TRIM

and SENSE(+) pins, the output voltage set point

(Vo,adj) decreases (see Figure 15). The following

equation determines the required external-resistor

value to obtain a percentage output voltage change of

%.

For output voltages : 28V

















kR downadj 2.111

%45.10631

Where,

100% ,

,



 nomo

desirednomo

VVV

Vdesired = Desired output voltage set point (V).

Figure 15. Circuit Configuration to Decrease

Output Voltage, JNW350R-T option.

Trim Up – Increase Output Voltage

With an external resistor (Radj-up) connected between

the SENSE(-) and TRIM pins, the output voltage set

point (Vo,adj) increases (see Figure 16).

The following equation determines the required

external-resistor value to obtain a percentage output

voltage change of %.

For output voltages : 28V

















kR upadj %5.488

Where,

100% ,

,



 nomo

nomodesired

VVV

Vdesired = Desired output voltage set point (V).

Data Sheet

May 5, 2010 JNW350R Power Modules; DC-DC Converters

36 – 75 Vdc Input; 28Vdc Output; 350W Output

LINEAGE POWER 10

Feature Description (continued)

Figure 16. Circ ui t Confi gu rati on to In c reas e

Output Voltage, JNW350Rx-T option.

Examples:

To trim down the output of a nominal 28V JNW350-T

module to 16.8V

100

28 8.1628

%



 VVV

% = 40













kR downadj 2.111

40 45.10631

Radj - down = 154.5 k

To trim up the output of a nominal 28V JNW350-T

module to 30.8V

100

28 288.30

%



 VVV

% = 10















kR upadj 10 5.488

Radj - up = 48.8 k

Active Voltage Programming

For both the JNW350Rx and JNW350Rx-T, a Digital-

Analog converter (DAC), capable of both sourcing

and sinking current, can be used to actively set the

output voltage, as shown in Figure 17. The value of

RG will be dependent on the voltage step and range of

the DAC and the desired values for trim-up and trim-

down %. Please contact your Lineage Power

technical representative to obtain more details on the

selection for this resistor.

Figure 17. Circuit Configuration to Actively Adjust

the Output Volt age.

Tunable Loop™

The JNW350Rx-T modules have a new feature that

optimizes transient response of the module called

Tunable Loop™.

External capacitors are usually added to the output of

the module for two reasons: to reduce output ripple

and noise and to reduce output voltage deviations

from the steady-state value in the presence of

dynamic load current changes. Adding external

capacitance however affects the voltage control loop

of the module, typically causing the loop to slow down

with sluggish response. Larger values of external

capacitance could also cause the module to become

unstable.

The Tunable LoopTM allows the user to externally

adjust the voltage control loop to match the filter

network connected to the output of the module. The

Tunable LoopTM is implemented by connecting a

series R-C between the SENSE(+) and TRIM pins of

the module, as shown in Fig. 48. This R-C allows the

user to externally adjust the voltage loop feedback

compensation of the module.

Figure 18. Circuit diagram showing conn ection of

RTUNE and CTUNE to tune the control loop of the

module.

Recommended values of RTUNE and CTUNE for different

output capacitor combinations are given in Tables 1

and 2. Table 1 shows the recommended values of

Data Sheet

May 5, 2010 JNW350R Power Modules; DC-DC Converters

36 – 75 Vdc Input; 28Vdc Output; 350W Output

LINEAGE POWER 11

RTUNE and CTUNE for different values of ceramic output

capacitors up to 8000F that might be needed for an

application to meet output ripple and noise

requirements. Selecting RTUNE and CTUNE according to

Table 2 will ensure stable operation of the module

In applications with tight output voltage limits in the

presence of dynamic current loading, additional

output capacitance will be required. Table 2 lists

recommended values of RTUNE and CTUNE in order to

meet 2% output voltage deviation limits for some

common output voltages in the presence of a 6A to

12A step change (50% of full load), with an input

voltage of 48V.

Table 1. General recommended values of of RTUNE

and CTUNE for Vout=28V and various external

ceramic capacitor combination s.

Cout(µF) 1100 2200 4400 6600 8000

RTUNE(k 348 200 51.1 36.5 40.2

CTUNE(pF) 1500 6800 10,000 15,000 15,000

Table 2. Recommended values of RTUNE and CTUNE

to obtain transient deviation of 2% of Vout for a

6A step load with Vin=48V.

Vo 32V 28V 25V 22V 19V 16.8V

Co(uF) 880 880 1100 1320 1320 1540

RTUNE(k



1000 402 348 221 84.5 61.9

CTUNE(pF) 820 1500 1500 2200 3300 6800

V 530 500 530 420 370 317

Please contact your Lineage Power technical

representative to obtain more details of this feature as

well as for guidelines on how to select the right value

of external R-C to tune the module for best transient

performance and stable operation for other output

capacitance values.

Over Temperature Protection

The JNW350R module provides with non-latching

over temperature protection. A temperature sensor

monitors the operating temperature of the converter. If

the reference temperature exceeds a threshold of 110

ºC (typical) at the center of the baseplate, the

converter will shut down and disable the output. When

the baseplate temperature has decreased by

approximately 20 ºC the converter will automatically

restart.

Thermal Considerations

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

thermally coupled to the case. Heat is removed by

conduction, convection, and radiation to the

surrounding environment. Proper cooling can be

verified by measuring the case temperature. Peak

temperature (TREF) occurs at the position indicated in

Figure 15.

Considerations include ambient temperature, airflow,

module power dissipation, and the need for increased

reliability. A reduction in the operating temperature of

the module will result in an increase in reliability. The

thermal data presented here is based on physical

measurements taken in a wind tunnel.

For reliable operation this temperature should not

exceed 100ºC at TREF 1 for cold plate applications or

exceed 112ºC at TREF 2 for applications using forced

convection airflow. 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 TREF temperature of the power modules is

discussed above, you can limit this temperature to a

lower value for extremely high reliability.

Figure 19. Case (T REF ) Temperature Measurement

Location (top view).

Thermal Derating

Thermal derating is presented for two different

applications: 1) Figure 20, the JNW350R module is

thermally coupled to a cold plate inside a sealed

clamshell chassis, without any internal air circulation;

and 2) Figure 21 and 22, the JNW350R module is

mounted in a traditional open chassis or cards with

forced air flow. In application 1, the module is cooled

entirely by conduction of heat from the module

primarily through the top surface to a coldplate, with

some conduction through the module’s pins to the

power layers in the system board. For application 2,

the module is cooled by heat removal into a forced

airflow that passes through the interior of the module

and over the top baseplate and/or attached heatsink.

Data Sheet

May 5, 2010 JNW350R Power Modules; DC-DC Converters

36 – 75 Vdc Input; 28Vdc Output; 350W Output

LINEAGE POWER 12

Thermal Considerations (continued)

250

275

300

325

350

375

20 30 40 50 60 70 80 90 100

Baseplate Temperature (C)

Output Power (W)

Figure 20. Output Power Derating for JNW350R in

Conduction cooling (cold plate) applications;

Ta <70ºC in vicinity of module interior; VIN = VIN,

Figure 21. Derating Output Current vs. local

Ambient temperat ure and Airflow , No Heatsink ,

Vin=48V.

Figure 22. Derating Output Current vs. local

Ambient temperature and Airflow, 1” Heatsink,

Vin=48V.

Layout Considerations

The JNW350R power module series are aluminum

base board packaged style, as such; component

clearance between the bottom of the power module

and the mounting (Host) board is limited. Avoid

placing copper areas on the outer layer directly

underneath the power module.

Post Solder Cleaning and Drying

Considerations

Post solder cleaning is usually the final circuit-board

assembly process prior to electrical board testing. The

result of inadequate 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 Lineage Power Board

Mounted Pow er Module s : Sold ering a nd Clean in g

Application Note.

Through-Hole Lead-Free Soldering

Information

The RoHS-compliant through-hole products use the

SAC (Sn/Ag/Cu) Pb-free solder and RoHS-compliant

components. They are designed to be processed

through single or dual wave soldering machines. The

pins have an RoHS-compliant finish that is compatible

with both Pb and Pb-free wave soldering processes.

A maximum preheat rate of 3C/s is suggested. The

wave preheat process should be such that the

temperature of the power module board is kept below

210C. For Pb solder, the recommended pot

temperature is 260C, while the Pb-free solder pot is

270C max. Not all RoHS-compliant through-hole

products can be processed with paste-through-hole

Pb or Pb-free reflow process. If additional information

is needed, please consult with your Lineage Power

representative for more details

Data Sheet

May 5, 2010 JNW350R Power Modules; DC-DC Converters

36 – 75 Vdc Input; 28Vdc Output; 350W Output

LINEAGE POWER 13

Mechanical Outline for Through-Hole Module

Dimensions are in inches and [millimeters].

Tolerances: x.xx in.  0.02 in. [x.x mm  0.5 mm] (Unless otherwise indicated)

x.xxx in  0.010 in. [x.xx mm  0.25 mm]

TOP VIEW

SIDE VIEW

BOTTOM

VIEW

Pin Description Pin Description Pin Description

1 Vin (+) 4 Vin (–) 7 Trim

2 On/Off 5 Vout (–) 8 Sense (+)

3 Baseplate 6 Sense (-) 9 Vout (+)

Data Sheet

May 5, 2010 JNW350R Power Modules; DC-DC Converters

36 – 75 Vdc Input; 28Vdc Output; 350W Output

LINEAGE POWER 14

Recommended Pad Layout for Through Hole Module

Dimensions are in inches and [millimeters].

Tolerances: x.xx in.  0.02 in. [x.x mm  0.5 mm] (Unless otherwise indicated)

x.xxx in  0.010 in. [x.xx mm  0.25 mm]

Data Sheet

May 5, 2010 JNW350R Power Modules; DC-DC Converters

36 – 75 Vdc Input; 28Vdc Output; 350W Output

Document No: DS08-005 ver 1.4

PDF name: jnw350r.ds.pdf

Ordering Information

Please contact your Lineage Power Sales Representative for pricing, availability and optional features.

Table 1. Device Code

Input Voltage Output

Voltage Output

Current Efficiency Connector

Type Product codes Comcodes

48V (36-75Vdc) 28V 12.5A 92% Through hole JNW350R641 CC109147476

48V (36-75Vdc) 28V 12.5A 92% Through hole JNW350R841-18TZ CC109153672

48V (36-75Vdc) 28V 12.5A 92% Through hole JNW350R641-18 CC109147451

48V (36-75Vdc) 28V 12.5A 92% Through hole JNW350R641Z CC109148623

48V (36-75Vdc) 28V 12.5A 92% Through hole JNW350R641-18Z CC109149712

48V (36-75Vdc) 28V 12.5A 92% Through hole JNW350R641-TZ CC109149836

48V (36-75Vdc) 28V 12.5A 92% Through hole JNW350R41-18TZ CC109150083

Table 2. Device Options

Characteristic Definition

Form Factor J J = Half Brick

Family Designator N

Input Voltage C C = Wide Range, 18V-36V

Output Power 350 350 = 350 Watts Maximum Output Power

Output Voltage R R = 28.0V nominal

Omit = Default Pin Length shown in Mechanical Outline Figures

6 6 = Pin Length: 3.68 mm ± 0.25mm , (0.145 in. ± 0.010 in.)

8 8 = Pin Length: 2.79 mm ± 0.25mm , (0.110 in. ± 0.010 in.)

Omit = Latching Mode

4 4 = Auto-restart following Overcurrent shutdown (OCP)

Omit = Positive Logic

1 1 = Negative Logic

Customer Specific XY XY = Customer Specific Modified Code, Omit for Standard Code

Omit = Standard open Frame Module

18 18= Unthreaded heat sink inserts

Tunable Loop™ T Internal compensation network optimized for Tunable Loop™ applications

Omit = RoHS 5/6, Lead Based Solder Used

Z Z = RoHS 6/6 Compliant, Lead free

RoHS

Options

Charact er and Posit i on

Pin Length

Action following

Protective Shutdown

On/Off Logic

Mechanical Features

Ratings

World Wide He adquarters

Lineage Power Corporation

601 Shiloh Road, Plano, TX 75074, USA

+1-800-526-7819

(Outside U.S.A.: +1-972-244-9428)

www.lineage power.com

e-mail: techsupport1@lineage power.com

A sia-Pacific Headqua rters

Tel: +65 6593 7211

Europe, Middle-East and Africa Headquarters

Tel: +49 898 780 672 80

India He adquar ters

Tel: +91 80 28411633

Lineage Power reserves the right to make chang es to the product(s) o r information contained herein without notice. No liability is assumed as a result of their use or

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

Lineage Power DC-DC products are protected under various patents. Information on these patents is available at www.lineagepower.com/patents.

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