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HBT060ZGHH Datasheet(PDF) 6 Page - Power-One

Part No. HBT060ZGHH
Description  HBT Series . Half-Brick DC/DC Converter 48V Input 60 Watt Triple Output
Download  12 Pages
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Maker  POWER-ONE [Power-One]
Homepage  http://www.power-one.com
Logo POWER-ONE - Power-One

HBT060ZGHH Datasheet(HTML) 6 Page - Power-One

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Data Sheet
HBT Series – Half-Brick DC/DC Converter
48V Input
60 Watt Triple Output
REV. 10/01
Page 6 of 12
www.power-one.com
Thermal Considerations
The power converter operates in various thermal
environments.
Sufficient
cooling
should
be
provided to help ensure reliable operation of the
converter. Major heat-dissipating components are
thermally coupled to the metal substrate. Heat is
removed from the metal substrate by conduction,
convection, and radiation to the surrounding
environment. Proper cooling can be verified by
measuring the temperature of the substrate. It is
recommended
the
substrate
temperature
be
maintained below 100 ºC for reliable operation.
When necessary, an additional heat sink can be
attached to the substrate to achieve desired
thermal performance.
Heat Transfer Characteristics
Increasing airflow over the converter enhances
the heat transfer via convection. Figure 4 shows
the maximum power that can be dissipated by the
converter
without
exceeding
the
maximum
substrate
temperature
versus
local
ambient
temperature (TA).
Use of Figures 4 and 5 to properly determine
proper airflow for cooling the converter at a given
output
power
and
a
maximum
ambient
temperature is illustrated in the following example.
Example
What is the minimum airflow required for the
device operating with an input voltage range of
33V to 75V, an output power of 60 W, at a
maximum ambient temperature of 70 ºC?
Solution:
Given: Vi = 33V-75V, Po = 60 W, TA = 70 ºC.
Step 1 (Determining PD): From Figure 5,
the maximum power dissipation is 12W (occurs at
Vin = 33V)
Step 2 (Determine airflow): From Figure
4, to maintain the substrate temperature below
100C, the airflow has to be greater than 160LFM
(interpolated between curves for 100LFM and
200LFM).
Test Setup
Figure 1 Input Reflected Ripple Current Test Set-up:
Note: Measure input reflected-ripple current with a simulated inductance (Ltest) of 12 uH. Capacitor Cs offsets possible
battery impedance. Measure current as shown above.
BATTERY
Cs 220 uF
ESR < 0.1 OHM
@ 20 ºC, 100
kHz
Ltest
12 uH
22uF
ESR < 0.7 OHM
@ 20 ºC, 100 kHz
Vi(+)
Vi(-)
TO CURRENT PROBE


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