ATR28XXT Datasheet, PDF (1/6 Pages) International Rectifier – HYBRID-HIGH RELIABILITY DC/DC CONVERTER

PD-94551D
HYBRID-HIGH RELIABILITY
DC/DC CONVERTER
ATR28XXT SERIES
28V Input, Triple Output
Description
The ATR28XXT Series of DC/DC converters provide
30W of output power over the full military temperature
range with no derating. These devices are pin
compatible with the ATO series converters but offer
twice the maximum output power in a lower profile
package. A custom CMOS ASIC pulse width modulator
operating at a nominal switching frequency of 550KHz
combined with a unique magnetic feedback reduces
circuit complexity for enhanced reliability. These
converters provide 500V input to output isolation and
operate in highly efficient single forward mode.
The advanced feedback design and high operating
frequency provide an extremely wide bandwidth control
loop with high gain and phase margin. This results in
fast dynamic line and load response as well as superior
audio rejection. The control loop is compensated to
provide optimum performance over the full military
temperature range and over the 16V to 40V input voltage
range.
These converters are protected against both continuous
output short circuits and output overload. Either load
fault condition will result in operating in a low power
dissipation foldback mode. The converters will shut
down for approximately 15ms, then attempt to restart.
This cycle will continue indefinitely unless the load fault
is corrected. Recovery to normal operation is automatic
upon removal of the load fault.
ATR
Features
n 30W Output Power
n Flexible Output Loading
n -55°C to +125°C Operation
n Pin Compatible with ATO
n 0.410” Maximum Height
n 16V to 40VDC Input Range
n 500V Input to Output Isolation
n High Audio Rejection
n MIL-STD-704 Compatible
n Load Fault Protection - Short Circuit and
Overload
n TTL level Compatible Synchronization
n Standard Microcircuit Drawings Available
Manufactured in a facility full qualified to MIL-PRF-38534,
these converters are fabricated utilizing DSCC qualified
processes. For available screening options, refer to
device screening table in the data sheet. Variations in
electrical, mechanical and screening can be limited
accomodated. Contact IR Santa Clara with specific
requirements.
www.irf.com
1
08/06/07