REV. JUN 09, 2004
Page 1 of 11
FHS DC-DC Series Data Sheet
500-Watt, Full-Brick Converter
Applications
Base station amplifiers
Distributed power architectures
Telecommunications equipment
LAN/WAN applications
Data processing applications
Features
Low profile – 12.7 mm height
Input-to-output isolation: 1500VDC
Basic insulation
High efficiency - up to 93% at full load
Tight dynamic load response
Output overcurrent protection
Output overvoltage protection
Overtemperature protection
Remote sense
Remote on/off (primary referenced), positive
or negative logic option
Output voltage trim adjust, positive or
negative option
UL 1950 Recognition, CSA 22.2 No. 950-95
certification, TUV IEC950
Description
The FHS Series power modules are dc-dc converters that operate over an input voltage range of 36 to 75VDC and
provide a regulated DC output voltage at up to 18 amps of output current. The output is fully isolated from the
input, which allows a positive or negative output configuration.
The open-frame module is constructed with a two-board approach.
The power devices are connected to an
Insulated Metal Substrate (IMS) base plate, which provides very low thermal impedance. A separate PCB is
populated with the control circuitry and is physically isolated from the hotter IMS board. This approach allows for
lower component temperatures, hence increased reliability.
The standard feature set includes remote on/off,
remote output voltage sensing, negative logic output trim (optional positive logic output trim available
1), input under
and overvoltage lockout and overtemperature shutdown with hysteresis.
Model Selection
Model
Input
voltage
(VDC)
Input
current, Max,
(ADC)
Output
voltage
(VDC)
Output rated
current
I rated, (ADC)
Output
Ripple/Noise
(mV p-p)
Typical
Efficiency
@ I rated, (%)
FHS18Z28
36-75
16
28
18
150
93
This product is intended for integration into end-use equipment.
All the required procedures for CE marking of end-use
equipment should be followed.
1
Consult factory for availability.