Product Brief
HHD25 Series 20/25A, Half-Brick DC/DC Converter
24V/48V Input
Dual Output
REV. 7/01
www.power-one.com
Applications
Distributed power architectures
Telecommunications equipment
LAN/WAN applications
Data processing applications
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
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 55C
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
Input
current,
max, ADC
Output
voltage,
VDC
Output rated
current, ADC
Output Ripple
and Noise,
mV p-p
Typical
Efficiency
%
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
Product Brief
HHD25 Series 20/25A, Half-Brick DC/DC Converter
24V/48V Input
Dual Output
REV. 7/01
www.power-one.com
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 required
Remote On/Off
Negative- Add "N" suffix
0.18"- Standard, no suffix required
0.11"- Add "8" suffix
Pin Length
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.
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