Product Brief
HHD25 Series – 20/25A, Half-Brick DC/DC Converter
24V/48V Input
Dual Output
Features
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
Applications
Distributed power architectures
•
Telecommunications equipment
•
LAN/WAN applications
•
Data processing applications
•
•
insulation
UL 1950 Recognition, CSA 22.2 No. 950-95
•
certification, TUV IEC950
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
HHD20ZGE 36-72 3.6 5.0/3.3 20/20 100 87
HHD20ZGB 36-72 3.6 5.0/1.8 20/20 100 85
HHD25ZED 36-72 3.1 3.3/2.5 25/20 100 85
HHD25ZEB 36-72 3.1 3.3/1.8 25/20 100 84
HHD20YGE 18-36 7.2 5.0/3.3 20/20 100 85
REV. 7/01
Input
current,
max, ADC
Output
voltage,
VDC
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Output rated
current, ADC
Output Ripple
and Noise,
mV p-p
Typical
Efficiency
%
Product Brief
HHD25 Series – 20/25A, Half-Brick DC/DC Converter
24V/48V Input
Dual Output
Mechanical Drawing
Pin#Function
1 -Vin
2 Case
3 On/Off
4 +Vin
5 +V2 out
6 V2 Return
7 V2 Trim
8 +V1 out
9 V1 Return
10 V1 Trim
Bottom (Pin) View Side View
Tolerances: .xx ± .020 (.5)
.xxx ± .010 (.25)
Pin diameter ± .0.002 (.05)
Ordering Information
Options Suffixes to add to part number
Positive- Standard, no suffix requiredRemote On/Off Negative- Add “N” suffix
Pin Length
0.18”- Standard, no suffix required
0.11”- Add “8” suffix
0.15”- Add “9” suffix
Notes
1. Consult factory for the complete list of available options.
2. Power-One products are not authorized for use as critical components in life support systems, equipment used in hazardous
environments, or nuclear control systems without the express written consent of the President of Power-One, Inc.
3. Specifications are subject to change without notice.
REV. 7/01
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