JRCW450R41Z - GE Critical Power - Datasheet.Directory

Data Sheet

JRCW450R Orca* Series; DC-DC Converter Power Modules

36–75 Vdc Input; 32Vdc Output; 450W Output

Features

 Compliant to RoHS II EU Directive 2011/65/EC (-Z versions)

 Compliant to REACH Directive (EC) No 1907/2006

 High power density: 166 W/in3

 Very high efficiency: >94% Typ at Full Load

 Industry standard half-brick pin-out

 Low output ripple and noise

 Industry standard, DOSA compliant 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

 Constant Current Overcurrent limit

 Latch after short circuit fault shutdown

 Over temperature protection auto restart

 Output voltage adjustment trim, 16.0Vdc to 35.2Vdc

 Wide operating case temperature range (-40°C to 100°C)

 CE mark meets 2006/95/EC directives§

 ANSI/UL# 60950-1, 2nd Ed. Recognized, CSA† C22.2 No. 60950-

1-07 Certified, and VDE‡ 0805-1 (EN60950-1, 2nd Ed.) Licensed

 ISO** 9001 and ISO 14001 certified manufacturing facilities

 Compliant to IPC-9592A, Category 2, Class II

Applications

 RF Power Amplifier

 Wireless Networks

 Switching Networks

Options

 Output OCP/OVP auto restart

 Shorter pins

 Unthreaded heatsink holes

 Tunable Loop for transient response optimization

Description

The JRCW450R Orca series of dc-dc converters are a new generation of isolated, very high efficiency DC/DC power modules

providing up to 450W output power in an industry standard, DOSA compliant 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 Loop, 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.

* Trademark of General Electric Company

# 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

RoHS Compliant

Data Sheet

JRCW450R Orca Series; DC-DC Converter Power Modules

36–75 Vdc Input; 32.0Vdc Output; 450W Output

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 All Ta -40 85 °C

Operating Case Temperature

(See Thermal Considerations section, Figure 17)

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 14.0 Adc

Inrush Transient All I2t 2 A2s

Input Reflected Ripple Current, peak-to-peak

(5Hz to 20MHz, 12μH 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 25 A in the ungrounded input connection (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

JRCW450R Orca Series; DC-DC Converter Power Modules

36–75 Vdc Input; 32.0Vdc Output; 450W Output

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 31.5 32 32.5 Vdc

Output Voltage Set-Point Total Tolerance

(Over all operating input voltage, resistive load, and temperature

conditions until end of life)

All VO 31.0  33.0 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 > TBD mΩ)1

All,

except -T

CO 440 6500 μF

Without the Tunable Loop

(ESRMAX = 80mΩ)1

-T

440

470

μF

With the Tunable Loop (ESR > 50 mΩ)2 -T CO 440 10,000 μF

Output Power (Vo=32V to 35.2V) All PO,max   450 W

Output Current All Io 0 14.0 Adc

Output Current Limit Inception (Constant current until V

trimMIN

duration <4s)

All IO, lim 16.0  20.0 Adc

Output Short Circuit Current (VO≤ 0.25Vdc) All IO, sc

60 Apk

Hiccup mode 5 Arms

Efficiency

VIN=VIN, nom, Tc=25°C IO=IO, max , VO= VO,set All η 94.0 94.4  %

Switching Frequency fsw  175  kHz

Dynamic Load Response

(∆Io/∆t=1A/10µs; V

,nom; T

=25°C; Tested with a 470 μF

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

Settling 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 -20OC, use more than 3 of recommended minimum capacitors.

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  15  nF

Isolation Resistance Riso 10   MΩ

Data Sheet

JRCW450R Orca Series; DC-DC Converter Power Modules

36–75 Vdc Input; 32.0Vdc Output; 450W Output

General Specifications

Parameter Device Symbol Min Typ Max Unit

Calculated Reliability based upon Telcordia SR-332 Issue 3:

Method I Case 3 (IO=80%IO, max, TA=40°C, airflow = 200 lfm, 90%

confidence)

All FIT 214.5 109/Hours

MTBF 4,661,316 Hours

Weight All  76.4  g

2.69 oz.

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

IN, min

to V

IN, max

; open collector or equivalent,

Signal referenced to V

IN-

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

on/off



1.0

Logic Low - On/Off Voltage

All

on/off



1.2

Logic High Voltage – (Typ = Open Collector)

All

on/off



Logic High maximum allowable leakage current

All

on/off 



μA

Turn-On Delay and Rise Times

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

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

with Remote On/Off set to ON, All Tdelay  120  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  20  ms

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

All,

except -T

Trise  50  ms

All with -T  110  ms

Output Voltage Overshoot 3 % VO, set

(IO=80% of IO, max, TA=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 16.0 --- 35.2 Vdc

Output Overvoltage Protection All VO, limit 37  40 Vdc

Over Temperature Protection All Tref  110  °C

(See Feature Descriptions, Figure 17)

Input Under Voltage Lockout

IN, UVLO

Turn-on Threshold

All

Turn-off Threshold

All

Hysteresis

All

Input Over voltage Lockout

IN, OVLO

Turn-on Threshold

All



79.5

Turn-off Threshold

All



Hysteresis

All

---

Data Sheet

JRCW450R Orca Series; DC-DC Converter Power Modules

36–75 Vdc Input; 32.0Vdc Output; 450W Output

Characteristic Curves

The following figures provide typical characteristics for the JRCW450R (32V, 14A) at 25ºC. The figures are identical for either

positive or negative Remote On/Off logic.

EFFICIENCY (%)

On/Off VOLTAGE OUTPUTVOLTAGE

VON/OFF(V) (5V/div) VO (V) (10

V/div)

OUTPUT CURRENT, I

(A)

TIME, t (40ms/div)

Figure 1. Converter Efficiency versus Output Current.

Figure 4. Typical Start-Up Using negative Remote On/Off;

Co,ext = 440µF.

OUTPUT VOLTAGE

VO (V) (100mV/div)

INPUT VOLTAGE OUTPUT VOLTAGE

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

TIME, t (1µs/div)

TIME, t (40ms/div)

Figure 2. Typical Output Ripple and Noise at Room

Temperature and 48Vin; Io = Io,max; Co,ext = 440µF.

Figure 5. Typical Start-Up from V

, on/off enabled prior to

VIN step; Co,ext = 470µF.

OUTPUT CURRENT OUTPUT VOLTAGE

IO (A) (5A/div) VO(V) (500mV/div)

OUTPUT CURRENT OUTPUT VOLTAGE

IO (A) (5A/div) VO(V) (500mV/div)

TIME, t (1ms/div)

Figure 3. Dynamic Load Change Transient Response from

25% to 50% to 25% of Full Load at Room Temperature and

48 Vin; 0.1A/uS, Co,ext = 440µF.

Figure 6. Dynamic Load Change Transient Response from

50 % to 75% to 50% of Full Load at Room Temperature and

48 Vin; 0.1A/uS, Co,ext = 440µF.

Data Sheet

JRCW450R Orca Series; DC-DC Converter Power Modules

36–75 Vdc Input; 32.0Vdc Output; 450W Output

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 470μF 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 JRCW450R 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-dependent.

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., UL 60950-1, 2nd Ed.,

CSA No. 60950-1 2nd Ed., and VDE0805-1 EN60950-1, 2nd Ed.

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

JRCW450R Orca Series; DC-DC Converter Power Modules

36–75 Vdc Input; 32.0Vdc Output; 450W Output

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 25

A fast-acting or time-delay fuse in the ungrounded input

connection.

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 50μA.

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 continuous overcurrent by providing

constant current output, for up to 4 seconds, as long as the

output voltage is greater than VtrimMIN. If the load resistance is

to low to support VtrimMIN in an overcurrent condition or a short

circuit load condition exists, the module will shutdown

immediately.

A latching shutdown option is standard. Following shutdown,

the module will 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 greater than 19A

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 option (4) is also available in a case where an

auto recovery is required.

Data Sheet

JRCW450R Orca Series; DC-DC Converter Power Modules

36–75 Vdc Input; 32.0Vdc Output; 450W Output

Feature Description (continued)

Remote sense

Remote sense minimizes the effects of distribution losses by

regulating the voltage at the remote-sense connections (see

Figure 11). For No Trim or Trim down application, the voltage

between the remote-sense pins and the output terminals

must not exceed the output voltage sense range given in the

Feature Specifications table i.e.:

[Vo(+)–Vo(-)] – [SENSE(+) – SENSE(-)] ≤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. 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 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. Trimming down is

accomplished by connecting an external resistor between the

TRIM pin and the SENSE(-) pin. Trimming up is accomplished

by connecting external resistor between the SENSE(+) pin and

TRIM pin. 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.

Figure 12. Output Voltage Trim Limits vs. Input Voltage.

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 13). The following equation determines the

required external-resistor value to obtain a percentage output

voltage change of ∆%.

For output voltages: VO,nom = 32V

Without –T Option

With –T Option

Ω











−

∆

=kR

downadj

100

Ω











−

∆

=kR down

adj 11

1000

Where,

100%

−

=∆

nomo

desirednomo

VVV

Vdesired = Desired output voltage set point (V).

Figure 13. Circuit Configuration to Decrease Output

Voltage.

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 14).

The following equation determines the required external-

resistor value to obtain a percentage output voltage change

of ∆%.

35 40 45 50 55 60 65 70 75

Vin (V)

Vout (V)

Upper Trim Limit

Lower Trim Limit

Data Sheet

JRCW450R Orca Series; DC-DC Converter Power Modules

36–75 Vdc Input; 32.0Vdc Output; 450W Output

Feature Description (continued)

For output voltages: VO,nom = 32V

Without –T Option

Ω













∆

∆×+

−

∆×

∆+×

nomO

upadj

%%)2(100(

%225.1

%)100(

With –T Option

Ω











+

∆

=kR

upadj

12.15

27122

Where,

100%

−

=∆

nomo

nomodesired

VVV

Vdesired = Desired output voltage set point (V).

Figure 14. Circuit Configuration to Increase Output Voltage.

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.

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 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.

Examples:

To trim down the output of a nominal 32V module, without –T

option, to 16.8V

%5.47100

32 8.1632

%=×

−

=∆ VVV

Ω=Ω











−= 1052

5.47

100

_KR downadj

To trim up the output of a nominal 32V module, without –T

option, to 35.2V

%10100

32 322.35

%=×

−

=∆ VVV

ΚΩ











×+

−

=10 )10

100

(

225

.1 )

100(

_upadj

Radj _ up = 275.3kΩ

Active Voltage Programming

For both the JRCW450Rx and JRCW450Rx-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 15. 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 Δ%. Please contact your GE technical

representative to obtain more details on the selection for this

resistor.

Figure 15. Circuit Configuration to Actively Adjust the

Output Voltage.

Tunable Loop

The JRCW450Rx-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 Loop allows the user to externally adjust the

voltage control loop to match the filter network connected to

the output of the module. The Tunable Loop is implemented

by connecting a series R-C between the SENSE(+) and TRIM

pins of the module, as shown in Fig. 16. This R-C allows the

Data Sheet

JRCW450R Orca Series; DC-DC Converter Power Modules

36–75 Vdc Input; 32.0Vdc Output; 450W Output

user to externally adjust the voltage loop feedback

compensation of the module.

Figure 16. Circuit diagram showing connection of RTUNE and

CTUNE to tune the control loop of the module.

Table 1 shows the recommended values of RTUNE and CTUNE for

different values of electrolytic output capacitors up to 8800uF

that might be needed for an application to meet output ripple

and noise requirements.

Table 1. General recommended values of RTUNE and CTUNE

for various external electrolytic capacitor values.

Cout(µF) 1100 2200 4400 6600 8800

ESR (mΩ) 60 30 15 10 7.5

RTUNE 12k 4.7k 1.8k 820 390

CTUNE 220nF 220nF 220nF 220nF 220nF

Please contact your GE 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 JRCW450R module provides a non-latching over

temperature protection. A temperature sensor monitors the

operating temperature of the converter. If the reference

temperature, TREF 1, (see Figure 17) exceeds a threshold of 115

ºC (typical), the converter will shut down and disable the

output. When the base plate temperature has decreased by

approximately 20 ºC the converter will automatically restart.

The module can be restarted by cycling the dc input power for

at least one second or by toggling the remote on/off signal for

at least one second.

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 17.

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, using automated

thermo-couple instrumentation to monitor key component

temperatures: FETs, diodes, control ICs, magnetic cores,

ceramic capacitors, opto-isolators, and module pwb

conductors, while controlling the ambient airflow rate and

temperature. For a given airflow and ambient temperature,

the module output power is increased, until one (or more) of

the components reaches its maximum derated operating

temperature, as defined in IPC-9592. This procedure is then

repeated for a different airflow or ambient temperature until a

family of module output derating curves is obtained.

Heat-dissipating components inside the unit are thermally

coupled to the case. Heat is removed by conduction,

convection, and radiation to the surrounding environment.

For reliable operation this temperature should not

exceed 100ºC at either TREF 1 or TREF 2 for applications using

forced convection airflow or cold plate applications. 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.

Data Sheet

JRCW450R Orca Series; DC-DC Converter Power Modules

36–75 Vdc Input; 32.0Vdc Output; 450W Output

Figure 17. Case (TREF ) Temperature Measurement Location

(top view).

Thermal Derating

Thermal derating is presented for two different applications:

1) Figure 18, the JRCW450R module is thermally coupled to a

cold plate inside a sealed clamshell chassis, without any

internal air circulation; and 2) Figure 19, 20 and 21, the

JRCW450R 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 cold plate, 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 base plate and/or

attached heatsink.

Output Power (W)

Cold plate (inside surface) temperature (ºC)

Figure 18. Output Power Derating for JRCW450R in

Conduction cooling (cold plate) applications; Ta <70ºC

adjacent to module; VIN = VIN,NOM

Output Current, I

(A)

Ambient Temperature, T

(oC)

Figure 19. Derating Output Current vs. local Ambient

temperature and Airflow, No Heatsink, Vin=48V, airflow

from Vi(-) to Vi(+).

Output Current, IO (A)

Ambient Temperature, T

(oC)

Figure 20. Derating Output Current vs. local Ambient

temperature and Airflow, 0.5” Heatsink, Vin=48V, airflow

from Vi(-) to Vi(+).

Output Current, IO (A)

Ambient Temperature, T

(oC)

Figure 21. Derating Output Current vs. local Ambient

temperature and Airflow, 1.0” Heatsink, Vin=48V, airflow

from Vi(-) to Vi(+).

Data Sheet

JRCW450R Orca Series; DC-DC Converter Power Modules

36–75 Vdc Input; 32.0Vdc Output; 450W Output

Layout Considerations

The JRCW450R power module series are constructed using a

single PWB with integral base plate; 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 GE Board

Mounted Power Modules: Soldering and Cleaning 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. The

JRCW450R can not be processed with paste-through-hole Pb

or Pb-free reflow process. If additional information is needed,

please consult with your GE representative for more details.

Data Sheet

JRCW450R Orca Series; DC-DC Converter Power Modules

36–75 Vdc Input; 32.0Vdc Output; 450W Output

Mechanical Outline for Through-Hole Module

Dimensions are in millimeters and [inches].

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

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

TOP VIEW*

SIDE VIEW**

BOTTOM VIEW

Description

Vin (+)

On/Off

Baseplate

Vin (–)

Vout (–)

Sense (-)

Trim

Sense (+)

Vout (+)

*Top side label includes GE name, product designation, and data code.

Data Sheet

JRCW450R Orca Series; DC-DC Converter Power Modules

36–75 Vdc Input; 32.0Vdc Output; 450W Output

Recommended Pad Layout for Through Hole Module

Dimensions are in millimeters and [inches].

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

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

Data Sheet

JRCW450R Orca Series; DC-DC Converter Power Modules

36–75 Vdc Input; 32.0Vdc Output; 450W Output

For more information, call us at

USA/Canada:

+1 888 546 3243, or +1 972 244 9288

Asia-Pacific:

+86.021.54279977*808

Europe, Middle-East and Africa:

+49.89.878067-280

India:

+91.80.28411633

www.gecriticalpower.com

GE Critical Power reserves the right to make changes to the product(s) or information contained herein without notice, and 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.

Ordering Information

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

Table 2. Device Code

Input Voltage

Output

Voltage

Output

Current

Efficiency

Connector

Type

Product codes Comcodes

48V (36-75Vdc)

32V

14A

94%

Through hole

JRCW450R4Z

CC109162054

48V (36-75Vdc)

32V

14A

94%

Through hole

JRCW450R41Z

CC109153706

48V (36-75Vdc)

32V

14A

94%

Through hole

JRCW450R541Z

CC109168761

48V (36-75Vdc)

32V

14A

94%

Through hole

JRCW450R41-TZ

CC109164315

48V (36-75Vdc)

32V

14A

94%

Through hole

JRCW450R641-TZ

CC109164397

48V (36-75Vdc)

32V

14A

94%

Through hole

JRCW450R841-TZ

CC109166773

48V (36-75Vdc)

32V

14A

94%

Through hole

JRCW450R41-18Z

150027329

48V (36-75Vdc)

32V

14A

94%

Through hole

JRCW450R641-18Z

CC109164777

Table 3. Device Options

Mouser Electronics

Authorized Distributor

Click to View Pricing, Inventory, Delivery & Lifecycle Information:

GE (General Electric):

JRCW450R41-TZ JRCW450R41Z JRCW450R4Z JRCW450R541Z JRCW450R641-18Z JRCW450R641-TZ

JRCW450R841-TZ