HBC48T25120 Datasheet, PDF (9/16 Pages) Power-One – HBC48T25120 DC-DC Converter Data Sheet

HBC48T25120 DC-DC Converter Data Sheet
36-75 VDC Input; 12 VDC @ 25 A Output
Dynamic Load Response
Figs. 9-10 capture the converter’s loop response
when subjected to a step load change of 50% load to
75% load to 50% load. Two load slew rates are
shown with minimal and maximum external
capacitive loading conditions.
Ripple and Noise
Fig. 11 shows the output voltage ripple waveform,
measured at full rated load current with a 10 µF
tantalum and 1 µF ceramic capacitor across the
output. Note that all output voltage waveforms are
measured across a 1 µF ceramic capacitor. The
input reflected ripple current waveforms are obtained
using the test setup shown in Fig 12. The
corresponding waveforms are shown in Figs. 13-14.
Output Current Limiting
Fig. 15 shows the output load current behavior.
Fig. 16 illustrates the converter’s response to a
shorted output condition.
Electromagnetic Compatibility (EMC)
EMC requirements must be met at the end-product
system level, as no specific standards dedicated to
EMC characteristics of board mounted component
dc-dc converters exist. However, Power-One tests its
converters to several system level standards,
primary of which is the more stringent EN55022,
Information technology equipment - Radio
disturbance characteristics-Limits and methods of
measurement.
An effective internal LC differential filter significantly
reduces input reflected ripple current, and improves
EMC.
With the addition of a simple external filter, the
HBC48T25120 converter will pass the requirements
of Class B conducted emissions per EN55022 and
FCC requirements. Please contact Power-One
Applications Engineering for details of this testing.
Temperature Reference Information
Tc
Fig. H: Tc Reference Point Location (w/o Baseplate)
0.36"
0.88" 1
9
2 Tb
8
7
3
6
4
5
Top View
Fig. I: Tb Reference Point Location (w/ Baseplate)
MCD10127 Rev. 1.1, 09-Jun-10
Page 9 of 16
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