Data Sheet
GE
JRCW450U Orca* Series; DC-DC Converter Power Modules
36–75 Vdc Input; 48Vdc Output; 450W Output
Features
RoHS Compliant
Compliant to RoHS II EU Directive 2011/65/EC (-Z versions)
Compliant to REACH Directive (EC) No 1907/2006
3
High power density: 166 W/in
Very high efficiency: >94% Typ at Full Load
Industry standard half-brick pin-out
Low output ripple and noise
Industry standard half-brick footprint
57.7mm x 60.7mm x 12.8mm
(2.27” x 2.39” x 0.504”)
Remote Sense
2:1 input voltage range
Single tightly regulated output
Applications
Constant switching frequency
RF Power Amplifier
Constant Current Overcurrent limit
Wireless Networks
Latch after short circuit fault shutdown
Switching Networks
Over temperature protection auto restart
Output voltage adjustment trim, 28.8V to 57.6V
dc dc
Options
Wide operating case temperature range (-40°C to 100°C)
Output OCP/OVP auto restart
§
CE mark meets 2006/95/EC directives
Shorter pins
# †
ANSI/UL 60950-1, 2nd Ed. Recognized, CSA C22.2 No.
‡
Unthreaded heat sink holes 60950-1-07 Certified, and VDE 0805-1 (EN60950-1, 2nd Ed.)
Licensed
**
ISO 9001 and ISO 14001 certified manufacturing facilities
Description
The JRCW450U 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 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 heat sink for
high-temperature applications. The output is fully isolated from the input, allowing versatile polarity configurations and grounding
connections.
* Trademark of the 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
August 31, 2014 ©2012 General Electric Company. All rights reserved. Page 1
Data Sheet
GE
JRCW450U Orca Series; DC-DC Converter Power Modules
36–75 Vdc Input; 48.0Vdc 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 Case Temperature
All Tc -40 100 °C
(See Thermal Considerations section, Figure 16)
Storage Temperature All T -55 125 °C
stg
I/O Isolation Voltage: Input to Case, Input to Output All 1500 V
dc
Output to Case All 500 V
dc
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
All VIN 36 48 75 Vdc
(see Figure 12 for V when using trim-up feature)
IN MIN
Maximum Input Current
(V =36V to 75V, I =I) All I 14.0 A
IN O O, max IN,max dc
2 2
Inrush Transient All It 2 A s
Input Reflected Ripple Current, peak-to-peak
(5Hz to 20MHz, 12μH source impedance; VIN=0V to 75V, IO= IOmax ; All 20 mAp-p
see Figure 7)
Input Ripple Rejection (120Hz) All 40 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.
August 31, 2014 ©2012 General Electric Company. All rights reserved. Page 2
Data Sheet
GE
JRCW450U Orca Series; DC-DC Converter Power Modules
36–75 Vdc Input; 48.0Vdc Output; 450W Output
Electrical Specifications (continued)
Parameter Device Symbol Min Typ Max Unit
Output Voltage Set-point
All VO, set 47.0 48 49.0 Vdc
(VIN=VIN,nom, IO=IO, max, Tc =25°C)
Output Voltage Set-Point Total Tolerance
(Over all operating input voltage, resistive load, and temperature All VO 47.0 49.0 Vdc
conditions until end of life)
Output Regulation
Line (VIN=VIN, min to VIN, max) All 0.1 0.2 %Vo,set
Load (I =I to I) All 0.1 0.2 %V
O O, min O, max o,set
Temperature (T = -40ºC to +100ºC) All 0.25 0.5 %V
c o,set
Output Ripple and Noise on nominal output
(VIN=VIN, nom and IO=IO, min to IO, max)
RMS (5Hz to 20MHz bandwidth) All 100 125 mV
rms
Peak-to-Peak (5Hz to 20MHz bandwidth) All 300 400 mV
pk-pk
1
External Capacitance (ESR > 10 mΩ) All CO 440 6500 μF
Output Power (V =48V to 57.6V) All P 450 W
o O,max
Output Current All I 0 9.4 A
o dc
Output Current Limit Inception (Constant current until Vo1.0V.
oMAX; o
Isolation Specifications
Parameter Symbol Min Typ Max Unit
Isolation Capacitance C 15 nF
iso
Isolation Resistance R 10 MΩ
iso
General Specifications
Parameter Device Symbol Min Typ Max Unit
Calculated Reliability based upon Telcordia SR-332 Issue 3: 9
FIT 136.3 10 /Hours
All
Method I Case 3 (IO=80%IO, max, TA=40°C, airflow = 200 lfm, 90%
MTBF 7,338,052 Hours
confidence)
68 76.4 84 g
Weight All
2.40 2.69 2.96 oz.
August 31, 2014 ©2012 General Electric Company. All rights reserved. Page 3
Data Sheet
GE
JRCW450U Orca Series; DC-DC Converter Power Modules
36–75 Vdc Input; 48.0Vdc Output; 450W Output
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
(V =V to V ; open collector or equivalent,
IN IN, min IN, max
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 I 1.0 mA
on/off
Logic Low - On/Off Voltage All Von/off 0 0.8 Vdc
Logic High Voltage – (Typ = Open Collector) All Von/off 4 5 Vdc
Logic High maximum allowable leakage current All I 50 μA
on/off
Turn-On Delay and Rise Times
(Vin=V , I =I , 25C)
in,nom O O, max
Case 1: T = Time until V = 10% of V from application of V
delay O O,set in
All Tdelay 100 120 150 ms
with Remote On/Off set to ON
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 All Tdelay 15 20 25 ms
least one second.
Trise = time for VO to rise from 10% of VO,set to 90% of VO,set. All Trise 40 60 80
Synchronous Rectifier Activation Level and Delay*
Minimum IOUT to activate synch rectifier mode IOUT,SYNC 2.4 A
Minimum time to activate synch rectifier mode (I > I) T 1 ms
OUT OUT,SYNC SYNC
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 __ __
All Vsense 2 %Vo,nom
(only for No Trim or Trim down application )
Output Voltage Set-point Adjustment Range (trim) All V 28.8 --- 57.6 V
trim dc
Output Overvoltage Protection (TA=25C) All VO, limit 60 65 Vdc
Over Temperature Protection All Tref 108 115 120 °C
(See Feature Descriptions, Figure 16)
Input Under Voltage Lockout V
IN, UVLO
Turn-on Threshold All 33 35 36 V
dc
Turn-off Threshold All 30 32 33 V
dc
Hysteresis All 2.5 3 3.5 Vdc
Input Over voltage Lockout VIN, OVLO
Turn-on Threshold All 77 80 82 Vdc
Turn-off Threshold All 80 83.5 86 Vdc
Hysteresis All 2.5 3 5 V
dc
* Note: Module has internal circuit that inhibits output synchronous rectifier mode, during module startup, until IOUT> IOUT,SYNC for
time> TSYNC. Once output synchronous mode is activated, module remains in synchronous rectifier mode, even if load is reduced to
0A, until module output is turned off using on/off pin or loss of input voltage.
August 31, 2014 ©2012 General Electric Company. All rights reserved. Page 4
Data Sheet
GE
JRCW450U Orca Series; DC-DC Converter Power Modules
36–75 Vdc Input; 48.0Vdc Output; 450W Output
Characteristic Curves
The following figures provide typical characteristics for the JRCW450U (48V, 9.4A) at 25ºC. The figures are identical for either
positive or negative Remote On/Off logic.
OUTPUT CURRENT, Io (A) TIME, t (50ms/div)
Figure 1. Converter Efficiency versus Output Current. Figure 4. Typical Start-Up Using negative Remote On/Off;
Co,ext = 440µF.
TIME, t (50ms/div)
TIME, t (1s/div)
Figure 2. Typical Output Ripple and Noise at Room Figure 5. Typical Start-Up from VIN, on/off enabled prior to
Temperature and 48Vin; Io = Io,max; Co,ext = 440µF. VIN step; Co,ext = 470µF.
TIME, t (1ms/div)
TIME, t (1ms/div)
Figure 3. Dynamic Load Change Transient Response from Figure 6. Dynamic Load Change Transient Response from 50
% to 75% to 50% of Full Load at Room Temperature and 48
25% to 50% to 25% of Full Load at Room Temperature and
48 Vin; 0.1A/uS, C = 440µF. Vin; 0.1A/uS, C = 440µF.
o,ext o,ext
August 31, 2014 ©2012 General Electric Company. All rights reserved. Page 5
OUTPUT CURRENT OUTPUT VOLTAGE OUTPUT VOLTAGE
EFFICIENCY (%)
I (A) (5A/div) V (V) (500mV/div) VO (V) (100mV/div)
O O
INPUT VOLTAGE OUTPUT VOLTAGE On/Off VOLTAGE OUTPUTVOLTAGE
OUTPUT CURRENT OUTPUT VOLTAGE
V (V) (20V/div) V (V) (20V/div) V (V) (5V/div) V (V) (20V/div)
in O ON/OFF O
I (A) (5A/div) V (V) (500mV/div)
O O
Data Sheet
GE
JRCW450U Orca Series; DC-DC Converter Power Modules
36–75 Vdc Input; 48.0Vdc Output; 450W Output
configuration in Figure 7, a 470μF Low ESR aluminum
Test Configurations
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 JRCW450U power module requires a minimum output
capacitance of 440µF Low ESR aluminum capacitor, C to
out
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
Note: Measure the input reflected-ripple current with a simulated
and is load-dependent.
source inductance (LTEST) of 12 µH. Capacitor CS offsets possible
battery impedance. Measure the current, as shown above. Safety Considerations
Figure 7. Input Reflected Ripple Current Test Setup.
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.,
nd
CSA No. 60950-1 2 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
Note: Use a Cout (470 µF Low ESR aluminum or tantalum capacitor
voltage is less than 60V dc, if the input meets all of the
typical), a 0.1 µF ceramic capacitor and a 10 µF ceramic capacitor,
requirements for SELV, then:
and Scope measurement should be made using a BNC socket.
The output may be considered SELV. Output voltages will
Position the load between 51 mm and 76 mm (2 in. and 3 in.) from the
remain within SELV limits even with internally-generated
module.
non-SELV voltages. Single component failure and fault
Figure 8. Output Ripple and Noise Test Setup.
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 V (+) and V (+) are
I O
grounded simultaneously.
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:
Note: All measurements are taken at the module terminals. When
socketing, place Kelvin connections at module terminals to avoid
The input source is to be provided with reinforced
measurement errors due to socket contact resistance.
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.
Figure 9. Output Voltage and Efficiency Test Setup.
Another SELV reliability test is conducted on the whole
Design Considerations
system, as required by the safety agencies, on the
combination of supply source and the subject module to
Input Source Impedance
verify that under a single fault, hazardous voltages do
The power module should be connected to a low
not appear at the module’s output.
ac-impedance source. A highly inductive source impedance
can affect the stability of the power module. For the test
August 31, 2014 ©2012 General Electric Company. All rights reserved. Page 6
Data Sheet
GE
JRCW450U Orca Series; DC-DC Converter Power Modules
36–75 Vdc Input; 48.0Vdc Output; 450W Output
output voltage is greater than VtrimMIN. If the load resistance is
Safety Considerations (continued)
too low to support VtrimMIN in an overcurrent condition or a
All flammable materials used in the manufacturing of these
short circuit load condition exists, the module will shut down
modules are rated 94V-0, or tested to the UL60950 A.2 for
immediately.
reduced thickness.
A latching shutdown option is standard. Following shutdown,
the module will remain off until the module is reset by either
The input to these units is to be provided with a maximum 25
cycling the input power or by toggling the on/off pin for one
A fast-acting or time-delay fuse in the ungrounded input
second.
connection.
An auto-restart option (4) is also available in a case where an
To ensure safety compliance, the temperatures at Tref1, Tref2,
auto recovery is required. If overcurrent greater than 12A
or Tref3 should (Figure 16) not exceed the limits as specified in
persists for few milli-seconds, the module will shut down and
this table for Vin = 36 to 75V.
auto restart until the fault condition is corrected. If the output
overload condition still exists when the module restarts, it will
Tref1 or Tref2 Tref3
shut down again. This operation will continue indefinitely, until
o o
90C 130 C
the overcurrent condition is corrected.
Feature Description
Over Voltage Protection
Remote On/Off The output overvoltage protection consists of circuitry that
monitors the voltage on the output terminals. If the voltage on
Two remote on/off options are available. Positive logic turns
the output terminals exceeds the over voltage protection
the module on during a logic high voltage on the ON/OFF pin,
threshold, then the module will shut down and latch off. The
and off during a logic low. Negative logic remote On/Off,
overvoltage latch is reset by either cycling the input power for
device code suffix “1”, turns the module off during a logic high
one second or by toggling the on/off signal for one second.
and on during a logic low.
The protection mechanism is such that the unit can continue
To turn the power module on and off, the user must supply a
in this condition until the fault is cleared.
switch (open collector or equivalent) to control the voltage
An auto-restart option (4) is also available in a case where an
(V ) between the ON/OFF terminal and the V (-) terminal
on/off IN
auto recovery is required.
(see Figure 10). Logic low is 0V ≤ V ≤ 0.8V. The maximum
on/off
Remote sense
Ion/off during a logic low is 1mA, the switch should be maintain
a logic low level whilst sinking this current.
Remote sense minimizes the effects of distribution losses by
During a logic high, the typical maximum Von/off generated by
regulating the voltage at the remote-sense connections (see
the module is 5V, and the maximum allowable leakage
Figure 11). For No Trim or Trim down application, the voltage
current at V = 5V is 50μA.
on/off between the remote-sense pins and the output terminals
must not exceed the output voltage sense range given in the
If not using the remote on/off feature:
Feature Specifications table i.e.:
For positive logic, leave the ON/OFF pin open.
[Vo(+)–Vo(-)] – [SENSE(+) – SENSE(-)] 2% of Vo,nom
For negative logic, short the ON/OFF pin to VIN(-).
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
Figure 10. Circuit configuration for using Remote On/Off
voltage at the output terminals multiplied by the output
Implementation.
current. When using remote sense and trim: the output
voltage of the module can be increased, which at the same
Overcurrent Protection
output current would increase the power output of the
To provide protection in a fault output overload condition, the
module. Care should be taken to ensure that the maximum
module is equipped with internal current limiting protection
output power of the module remains at or below the
circuitry, and can endure continuous overcurrent by providing
maximum rated power.
constant current output, for up to 4 seconds, as long as the
August 31, 2014 ©2012 General Electric Company. All rights reserved. Page 7
Data Sheet
GE
JRCW450U Orca Series; DC-DC Converter Power Modules
36–75 Vdc Input; 48.0Vdc Output; 450W Output
Where,
Feature Description (continued)
Vo, nomVdesired
% 100
Vo, nom
Vdesired = Desired output voltage set point (V).
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
Figure 13. Circuit Configuration to Decrease Output
TRIM pin. The trim resistor should be positioned close to the
Voltage.
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 Up – Increase Output Voltage
trim. If not using the trim down feature, leave the TRIM pin
With an external resistor (Radj_up) connected between the
open.
SENSE(+) and TRIM pins, the output voltage set point (V )
o,adj
increases (see Figure 14).
The following equation determines the required external-
resistor value to obtain a percentage output voltage change
of %.
For output voltages: VO,nom = 48V
Without –T Option
V (100%)
(100 (2%)
O,nom
Radj _ up k
1.225% %
With –T Option
27122
Radj _up 15.12 k
%
Where,
Figure 12. Output Voltage Trim Limits vs. Input Voltage.
VdesiredVo, nom
% 100
Vo, nom
Trim Down – Decrease Output Voltage
V = Desired output voltage set point (V).
desired
With an external resistor (R ) between the TRIM and
adj_down
SENSE(-) pins, the output voltage set point (V ) decreases
o,adj
(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 = 48V
Without –T Option With –T Option
100
1000
Radj _ down 2 k Radj _ down 11 k
%
%
August 31, 2014 ©2012 General Electric Company. All rights reserved. Page 8
Data Sheet
GE
JRCW450U Orca Series; DC-DC Converter Power Modules
36–75 Vdc Input; 48.0Vdc Output; 450W Output
Active Voltage Programming
Feature Description (continued)
For the JRCW450Ux 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 R
G
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 GE technical representative to obtain more
details on the selection for this resistor.
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
Figure 15. Circuit Configuration to Actively Adjust the
output voltage is not the sum of both.
Output Voltage.
The maximum increase is the larger of either the remote
sense or the trim.
Over Temperature Protection
The amount of power delivered by the module is defined as
the voltage at the output terminals multiplied by the output The JRCW450U module provides a non-latching over
current. When using remote sense and trim, the output temperature protection. A temperature sensor monitors the
voltage of the module can be increased, which the same operating temperature of the converter. If the reference
output current would increase the power output of the temperature, T , (see Figure 16) exceeds a threshold of 115
REF 1
module. Care should be taken to ensure that the maximum ºC (typical), the converter will shut down and disable the
output power of the module remains at or below the output. When the base plate temperature has decreased by
maximum rated power. approximately 1-2 ºC the converter will automatically restart.
Examples:
Tunable Loop
To trim down the output of a nominal 48V module, without –T
The JRCW0450U-T modules have a new feature that
option, to 40V
optimizes transient response of the module called Tunable
Loop.
48V40V
% 100
48V
External capacitors are usually added to the output of the
%16.7% module for two reasons: to reduce output ripple and noise
and to reduce output voltage deviations from the steady-
100
Radj _ down 2 k
state value in the presence of dynamic load current changes.
16.7
Adding external capacitance however affects the voltage
Radj _ down 4.0k 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
To trim up the output of a nominal 48V module, without –T
unstable.
option, to 52.8V
The Tunable Loop allows the user to externally adjust the
52.8V48V
% 100
voltage control loop to match the filter network connected to
48V
the output of the module. The Tunable Loop is implemented
%10%
by connecting a series R-C between the SENSE(+) and TRIM
48(10010) (100(210)) pins of the module, as shown in Fig. 16. This R-C allows the
R k
adj _up
user to externally adjust the voltage loop feedback
1.22510 10
compensation of the module.
R 419.0k
adj _up
August 31, 2014 ©2012 General Electric Company. All rights reserved. Page 9
Data Sheet
GE
JRCW450U Orca Series; DC-DC Converter Power Modules
36–75 Vdc Input; 48.0Vdc Output; 450W Output
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.
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 R and C for
TUNE TUNE
different values of ceramic output capacitors up to 8000µF
that might be needed for an application to meet output ripple
and noise requirements.
Table 1. General recommended values of of RTUNE and CTUNE
for Vout=48V and various external ceramic capacitor
combinations.
Cout(µF) 1100 2200 4400 6600 8800
ESR (mΩ) 60 30 15 10 7.5
For reliable operation with Vin=48V this temperature should
RTUNE TBD TBD TBD TBD TBD
no texceed 100ºC at either T or T , or 130 ºC at T for
REF 1 REF 2 REF3
C
TUNE TBD TBD TBD TBD TBD applications using forced convection airflow without heat
sink, or in cold plate applications. The temperatures at either
TREF 1 or TREF 2 should not exceed 90ºC, when using a 1in. heat
Please contact your GE technical representative to obtain
sink in forced convection airflow. The output power of the
more details of this feature as well as for guidelines on how to
module should not exceed the rated power for the module as
select the right value of external R-C to tune the module for
listed in the ordering Information table. Although the
best transient performance and stable operation for other
maximum T temperature of the power modules is
REF
output capacitance values.
discussed above, you can limit this temperature to a lower
value for extremely high reliability.
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 16.
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.
Figure 16. Case (T ) Temperature Measurement Location
REF
The thermal data presented here is based on physical (top view).
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
August 31, 2014 ©2012 General Electric Company. All rights reserved. Page 10
Data Sheet
GE
JRCW450U Orca Series; DC-DC Converter Power Modules
36–75 Vdc Input; 48.0Vdc Output; 450W Output
Thermal Considerations (continued)
Thermal Derating
Thermal derating is presented for different applications in
Figure 17, 18 and 19. The JRCW450U module is mounted in a
traditional open chassis or cards with forced air flow. 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 heat sink. Conduction cooled
thermal derating is presented in Figure 20.
o
Ambient Temperature, T ( C)
A
Figure 19. Derating Output Current vs. local Ambient
temperature and Airflow, 1.0” Heat sink, Vin=48V, airflow
from Vi(-) to Vi(+).
o
Ambient Temperature, T ( C)
A
Figure 17. Derating Output Current vs. local Ambient
temperature and Airflow, No Heat sink, Vin=48V, airflow
from Vi(-) to Vi(+).
o
Cold Plate (inside surface) Temperature, TC ( C)
Figure 20. Derating Output Power in conduction cooling
(cold plate) applications, Vin=48V.
o
Ambient Temperature, TA ( C)
Figure 18. Derating Output Current vs. local Ambient
temperature and Airflow, 0.5” Heat sink, Vin=48V, airflow
from Vi(-) to Vi(+).
August 31, 2014 ©2012 General Electric Company. All rights reserved. Page 11
Output Current, IO (A)
Output Current, IO (A)
Output Power, P (W)
O
Output Current, IO (A)
Data Sheet
GE
JRCW450U Orca Series; DC-DC Converter Power Modules
36–75 Vdc Input; 48.0Vdc Output; 450W Output
Layout Considerations Through-Hole Lead-Free Soldering
The JRCW450U power module series are constructed using a
Information
single PWB with integral base plate; as such, component
The RoHS-compliant through-hole products use the SAC
clearance between the bottom of the power module and the
(Sn/Ag/Cu) Pb-free solder and RoHS-compliant components.
mounting (Host) board is limited. Avoid placing copper areas
They are designed to be processed through single or dual
on the outer layer directly underneath the power module.
wave soldering machines. The pins have a RoHS-compliant
Post Solder Cleaning and Drying
finish that is compatible with both Pb and Pb-free wave
soldering processes. A maximum preheat rate of 3C/s is
Considerations
suggested. The wave preheat process should be such that
Post solder cleaning is usually the final circuit-board assembly
the temperature of the power module board is kept below
process prior to electrical board testing. The result of
210C. For Pb solder, the recommended pot temperature is
inadequate cleaning and drying can affect both the reliability
260C, while the Pb-free solder pot is 270C max. The
of a power module and the testability of the finished
JRCW450U cannot be processed with paste-through-hole Pb
circuit-board assembly. For guidance on appropriate
or Pb-free reflow process. If additional information is needed,
soldering, cleaning and drying procedures, refer to GE Board
please consult with your GE representative for more details.
Mounted Power Modules: Soldering and Cleaning Application
Note.
August 31, 2014 ©2012 General Electric Company. All rights reserved. Page 12
Data Sheet
GE
JRCW450U Orca Series; DC-DC Converter Power Modules
36–75 Vdc Input; 48.0Vdc 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 side label includes GE name, product designation, and data code.
TOP VIEW*
SIDE VIEW**
BOTTOM VIEW
Pin Description
1 Vin (+)
2 On/Off
3 Baseplate
4 Vin (–)
5 Vout (–)
6 Sense (-)
7 Trim
8 Sense (+)
9 Vout (+)
August 31, 2014 ©2012 General Electric Company. All rights reserved. Page 13
Data Sheet
GE
JRCW450U Orca Series; DC-DC Converter Power Modules
36–75 Vdc Input; 48.0Vdc 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. ]
August 31, 2014 ©2012 General Electric Company. All rights reserved. Page 14
Data Sheet
GE
JRCW450U Orca Series; DC-DC Converter Power Modules
36–75 Vdc Input; 48.0Vdc Output; 450W Output
Ordering Information
Please contact your GE Sales Representative for pricing, availability and optional features.
Table 2. Device Code
Output Output Connector
Input Voltage Efficiency Product codes Comcodes
Voltage Current Type
48V (36-75Vdc) 48V 9.4A 94% Through hole JRCW450U641Z CC109168992
48V (36-75Vdc) 48V 9.4A 94% Through hole JRCW450U64-18Z 150022105
48V (36-75Vdc) 48V 9.4A 94% Through hole JRCW450U64-35Z 150034270
48V (36-75Vdc) 48V 9.4A 94% Through hole JRCW450U641-18Z 150021936
48V (36-75Vdc) 48V 9.4A 94% Through hole JRCW450U641-TZ CC109168984
48V (36-75Vdc) 48V 9.4A 94% Through hole JRCW450U64-18TZ CC109172838
Table 3. Device Options
Contact Us
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.
August 31, 2014 ©2012 General Electric Company. All International rights reserved. Version 1.27
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