AHF2815T_15 Datasheet, PDF (1/5 Pages) International Rectifier – HYBRID-HIGH RELIABILITY DC/DC CONVERTER

HYBRID-HIGH RELIABILITY
DC/DC CONVERTER
PD - 94542A
AHF2815T SERIES
28V Input, Triple Output
Description
The AHF2815T Series of DC/DC converters provide
8W of power and an extended temperature range for
use in military and industrial applications. Designed to
the nominal input requirements of MIL-STD-704, these
devices have nominal 28VDC inputs with +5V and ±15V
triple outputs to satisfy a wide range of requirements.
The basic circuit utilizes a pulse width modulated, feed
forward topology at a nominal switching frequency of
550KHz. Input to output isolation is achieved through
the use of transformers in the forward and feedback
circuits.
The proprietary magnetic feedback circuit provides for
an extremely wide bandwidth control loop with a high
phase margin. The closed loop frequency response of
this converter family extends to approximately 50KHz,
resulting in superior line and load transient characteristics.
This feedback method is also inherently temperature
and radiation insensitive. This gives the AHF Series
an important advantage over converters that incorporate opto-
couplers in their design.
Manufactured in a facility 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 accommodated.
Contact IR Santa Clara for special requirements.
AHF
Features
16V to 40VDC Input Range (28VDC Nominal)
5V, ±15V Output
Infinite Short Circuit and Overload Protection
8W Output Power
Fast Loop Response for Superior Transient
Characteristics
Operating Temperature Range from -55°C to
+125°C Available
Popular Industry Standard Pin-Out
Resistance Seam Welded Case for Superior
Long Term Hermeticity
Efficiency Up to 75%
Shutdown from External Signal
400,000 Hour MTBF at 85%
Constant Switching Frequency (550KHz Nominal)
Standard Microcircuit Drawing Available
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01/10/07