Data Sheet
HW/HC004/005/006 Series DC-DC Power Module:
May 16, 2008
18-36Vdc & 36-75Vdc Input; 1.0V-5Vdc Output; 4A - 6A Output Current
Thermal Considerations
C5 56nF
L2
The power modules operate in a variety of thermal
environments; however, sufficient cooling should be
provided to help ensure reliable operation.
10uH
Vin+
Vout+
C4
33uF
100V
HW005
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.
C1
0.68uF
C2
0.68uF
C3
0.68uF
Vin-
Vout-
L1 - CMC
Pulse P0354
C6 56nF
The thermal reference point, Tref used in the
specifications is shown in Figure 66. For reliable
Figure 67. Suggested Configuration for EN55022
Class B.
operation this temperature should not exceed 115 oC.
90
80
70
60
EN 55022 Class B Conducted Average dBuV
50
40
30
20
10
100K
Frequency(Hz)
500K
1M
5M
10M
30M
Figure 66. Tref Temperature Measurement Location.
Figure 68. EMC signature using above filter,
HW005A0F.
Please refer to the Application Note “Thermal
Characterization Process For Open-Frame Board-
Mounted Power Modules” for a detailed discussion of
thermal aspects including maximum device
temperatures.
For further information on designing for EMC
compliance, please refer to the FLTR100V10 data sheet
(FDS01-043EPS).
Layout Considerations
The HW/HC005 power module series are low profile in
order to be used in fine pitch system card architectures.
As such, component clearance between the bottom of
the power module and the mounting board is limited.
Avoid placing copper areas on the outer layer directly
underneath the power module. Also avoid placing via
interconnects underneath the power module.
Heat Transfer via Convection
Increased airflow over the module enhances the heat
transfer via convection. Derating figures showing the
maximum output current that can be delivered by each
module versus local ambient temperature (TA) for natural
convection and up to 3m/s (600 ft./min) are shown in the
respective Characteristics Curves section.
For additional layout guide-lines, refer to FLTR100V10
data sheet.
EMC Considerations
The figure 67 shows a suggested configuration to meet
the conducted emission limits of EN55022 Class B.
LINEAGE POWER
19
LINEAGEPOWER [ LINEAGE POWER CORPORATION ]
