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
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
www.power-one.com
Product Brief
HHD25 Series – 20/25A, Half-Brick DC/DC Converter
24V/48V Input
Dual Output
Mechanical Drawing
Pin
#
1
2
3
4
5
6
7
8
9
10
Function
-Vin
Case
On/Off
+Vin
+V2 out
V2 Return
V2 Trim
+V1 out
V1 Return
V1 Trim
Bottom (Pin) View
Side View
.xx
±
.020 (.5)
.xxx
±
.010 (.25)
Pin diameter
±
.0.002 (.05)
Tolerances:
Ordering Information
Options
Remote On/Off
Pin Length
Suffixes to add to part number
Positive- Standard, no suffix required
Negative- Add “N” suffix
0.18”- Standard, no suffix required
0.11”- Add “8” suffix
0.15”- Add “9” suffix
Notes
1.
2.
3.
Consult factory for the complete list of available options.
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.
Specifications are subject to change without notice.
REV. 7/01
www.power-one.com
Microcontroller MCU
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