Data Sheet
April 3, 2012
JRCW450R Series Power Modules; DC-DC Converters
36-75 Vdc In
p
ut
;
32Vdc Out
p
ut
;
450W Out
p
ut
*
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: DS09-011 ver 1.0
PDF name: JRCW450R.pdf
ORCA SERIES™
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)
High power density: 166 W/in
3
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, 16.0V
dc
to 35.2V
dc
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
TM
, 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
April 3, 2012
JRCW450R Power Modules; DC-DC Converters
36 – 75 Vdc Input; 32Vdc Output; 450W 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 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, 12H 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
April 3, 2012
JRCW450R Power Modules; DC-DC Converters
36 – 75 Vdc Input; 32Vdc Output; 450W 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 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 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 10,000 F
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 Vo<VtrimMIN , 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 94.0 94.4
%
Switching Frequency fsw 175 kHz
Dynamic Load Response
(Io/t=1A/10s; 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
ts
2
1.5
%VO, set
ms
Load Change from Io= 25% to 50% of Io,max:
Peak Deviation
Settlin
g
Time
(
Vo<10% peak deviation
)
Vpk
ts
2
1.5
%VO, set
ms
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 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,
T
A
=40°C
,
airflow = 200 lfm
,
90% confidence
)
All FIT 498.3 109/Hours
MTBF 2,006,767 Hours
Weight All
76.4 g
2.69 oz.
Data Sheet
April 3, 2012
JRCW450R Power Modules; DC-DC Converters
36 – 75 Vdc Input; 32Vdc Output; 450W 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
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
O
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 All Ion/off 50 A
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
onl
for No Trim or Trim down a
lication
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 Descri
p
tions, Fi
g
ure 17
)
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
April 3, 2012
JRCW450R Power Modules; DC-DC Converters
36 – 75 Vdc Input; 32Vdc Output; 450W Output
5
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 (%)
O
n
/Off
V
O
LTA
G
E
O
UTPUTV
O
LTA
G
E
VON/OFF(V) (5V/div) VO (V) (10V/div)
OUTPUT CURRENT, Io (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 (1s/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 VIN, 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) 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
April 3, 2012
JRCW450R Power Modules; DC-DC Converters
36 – 75 Vdc Input; 32Vdc Output; 450W 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 470F 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
April 3, 2012
JRCW450R Power Modules; DC-DC Converters
36 – 75 Vdc Input; 32Vdc Output; 450W 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 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 50A.
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
April 3, 2012
JRCW450R Power Modules; DC-DC Converters
36 – 75 Vdc Input; 32Vdc Output; 450W 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
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 V・o,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
kR downadj 2
%
100
_
kR downadj 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 %.
15
20
25
30
35
35 40 45 50 55 60 65 70 75
Vin (V)
Vout (V)
Upper Trim Limit
Lower Trim Limit
Data Sheet
April 3, 2012
JRCW450R Power Modules; DC-DC Converters
36 – 75 Vdc Input; 32Vdc Output; 450W Output
LINEAGE POWER 9
Feature Description (continued)
For output voltages: VO,nom = 32V
Without –T Option
k
V
RnomO
upadj %%)2(100(
%225.1
%)100(
,
_
With –T Option
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
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

10 )102(100(
10225.1 )10100(32
_upadj
R
Radj _ up = 275.3k
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 %. Please contact your Lineage Power
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 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
Data Sheet
April 3, 2012
JRCW450R Power Modules; DC-DC Converters
36 – 75 Vdc Input; 32Vdc Output; 450W Output
LINEAGE POWER 10
between the SENSE(+) and TRIM pins of the module,
as shown in Fig. 16. This R-C allows the 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 8800F 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 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 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.
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.
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.
Data Sheet
April 3, 2012
JRCW450R Power Modules; DC-DC Converters
36 – 75 Vdc Input; 32Vdc Output; 450W Output
LINEAGE POWER 11
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, IO (A)
Ambient Temperature, TA (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, TA (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, TA (oC)
Figure 21. Derating Output Current vs. local
Ambient temperature and Airflow, 1.0” Heatsink,
Vin=48V, airflow from Vi(-) to Vi(+).
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 Lineage Power 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 3C/s is suggested. The
wave preheat process should be such that the
temperature of the power module board is kept below
210C. For Pb solder, the recommended pot
temperature is 260C, while the Pb-free solder pot is
270C 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 Lineage Power representative for more details.
Data Sheet
April 3, 2012
JRCW450R Power Modules; DC-DC Converters
36 – 75 Vdc Input; 32Vdc Output; 450W Output
LINEAGE POWER 12
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
Pin Description
1 Vin (+)
2 On/Off
3 Baseplate
4 Vin (–)
5 Vout (–)
6 Sense (-)
7 Trim
8 Sense (+)
9 Vout (+)
*Top side label includes Lineage Power name, product designation, and data code.
Data Sheet
April 3, 2012
JRCW450R Power Modules; DC-DC Converters
36 – 75 Vdc Input; 32Vdc Output; 450W Output
LINEAGE POWER 13
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
April 3, 2012
JRCW450R Power Modules; DC-DC Converters
36 – 75 Vdc Input; 32Vdc Output; 450W Output
Document No: DS09-011 ver 1.0
PDF name: JRCW450R.pdf
Ordering Information
Please contact your Lineage Power 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 JRCW450R641-18Z CC109164777
Table 3. Device Options
World Wide Headquarters
Lineage Power Corporation
601 Shiloh Road, Plano, TX 75074, USA
+1-800-526-7819
(Outside U.S.A.: +1-972-244-9428)
www.lineagepower.com
e-mail: techsupport1@lineagepower.com
Asia-Pacific Headquarters
Tel: +65 6593 7211
Europe, Middle-East and Africa Headquarters
Tel: +49 89 878067-280
India Headquarters
Tel: +91 80 28411633
Lineage Power reserves the right to make changes to the product(s) or information contained herein without notice. No liability is assumed as a result of their use or
a
pplication. No rights 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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