Product Brief
HHD25 Series – 20/25A, Half-Brick DC/DC Converter
24V/48V Input
Dual Output
Features
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100/85 Watt total output power
Independently regulated outputs
Flexible load distribution
Open-frame design with Insulated Metal
Substrate
Low profile – 12.7mm height
High efficiency - 87%
Output voltage tracking
Output overcurrent protection
Output overvoltage protection
Overtemperature protection
Setpoint accuracy
±
1.5%
Independent output voltage trim, positive or
negative
Input/output isolation: 1500VDC, basic
insulation
UL 1950 Recognition, CSA 22.2 No. 950-95
certification, TUV IEC950
Applications
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Distributed power architectures
Telecommunications equipment
LAN/WAN applications
Data processing applications
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Description
The HHD25 is a new series of high density
Halfbrick
size,
High
current,
Dual
output DC/DC converters with
through-hole mounting. The products provide onboard conversion of standard Telecom and Datacom input
voltages to two independently-regulated output voltages. Leading-edge technology provides extremely high
efficiency and superior thermal performance which enables the products to deliver full rated power at 55°C
ambient temperature with only 200 LFM forced air without addition of a heatsink. The outputs also track
each other during both startup and shutdown.
Selection Chart
Model
Input
voltage
range, VDC
36-72
36-72
36-72
36-72
18-36
Input
current,
max, ADC
3.6
3.6
3.1
3.1
7.2
Output
voltage,
VDC
5.0/3.3
5.0/1.8
3.3/2.5
3.3/1.8
5.0/3.3
Output rated
current, ADC
20/20
20/20
25/20
25/20
20/20
Output Ripple
and Noise,
mV p-p
100
100
100
100
100
Typical
Efficiency
%
87
85
85
84
85
HHD20ZGE
HHD20ZGB
HHD25ZED
HHD25ZEB
HHD20YGE
REV. 7/01
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