JPW200S52R5-BH Power Module; dc-dc Converter
38 Vdc - 75 Vdc Input, 52.5 Vdc Output; 200W
Data Sheet
March 26, 2008
Example
Thermal Considerations
What is the minimum airflow necessary for the
JPW200S52R5-BH operating at VI = 52 V, an output current
of 3.5 A, and a maximum ambient temperature of 40 °C?
The power modules operate in a variety of thermal environ-
ments; 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
base plate. Heat is removed by conduction, convection, and
radiation to the surrounding environment. Proper cooling can
be verified by measuring the base plate temperature. Peak
temperature (TC) occurs at the position indicated in
Figure 16.
Solution
Given: VI = 52 V
IO = 3.5 A
TA = 40 °C
Determine airflow (v) (Use Figure 17.):
v = 1.0 m (200 ft/min)
MEASURE CASE
TEMPERATURE HERE
5.0
4.5
4.0
3.5
3.0
VI
(+)
VO(+)
2.5
2.0
1.5
1.0
0.5
0.0
ON/OFF
CASE
+ SEN
TRIM
– SEN
33.02
(1.30)
VI
(–)
VO(–)
20
30
40
50
60
70
80
(°C)
90
6.35
(0.25)
LOCAL AMBIENT TEMPERATURE, T
A
Figure 17. Derating Curve for JPW200S52R5-BH
(Vo = 52.5V) with base plate; Vin = 52V.
Note:Top view, pin locations are for reference only.
Figure 16. Case Temperature Measurement Location.
EMC Considerations
For assistance with designing for EMC compliance, please
refer to the FLTR100V10 data sheet
(FDS01-043EPS).
The temperature at this location should not exceed 100 °C.
The output power of the module should not exceed the rated
power for the module as listed in the Ordering Information
table.
Layout Considerations
Although the maximum case temperature of the power mod-
ules is 100 °C, you can limit this temperature to a lower
value for extremely high reliability.
Copper paths must not be routed beneath the power module
mounting inserts. For additional layout guidelines, refer to
the FLTR100V10 data sheet
Heat Transfer Without Heat Sinks
(DS98-152EPS).
Increasing airflow over the module enhances the heat trans-
fer via convection. Figure 17 shows the maximum output
current that can be delivered by the module without exceed-
ing the maximum case temperature versus local ambient
temperature (TA) for natural convection through 3 m/s (600
ft./min.).
Note that the natural convection condition was measured at
0.05 m/s to 0.1 m/s (10 ft./min. to 20 ft./min.); however, sys-
tems in which these power modules may be used typically
generate natural convection airflow rates of 0.3 m/s (60 ft./
min.) due to other heat dissipating components in the sys-
tem. The use of Figure 17 is shown in the following example.
Lineage Power
10
LINEAGEPOWER [ LINEAGE POWER CORPORATION ]
