AHP270XXD Datasheet, PDF (1/10 Pages) International Rectifier – HYBRID-HIGH RELIABILITYDC/DC CONVERTER

PD-97182A
HYBRID-HIGH RELIABILITY
DC/DC CONVERTER
AHP270XXD SERIES
270V Input, Dual Output
Description
The AHP Series of DC/DC converters feature high
power density without derating over the full military
temperature range. This series is offered as lower cost
alternatives to the legendary AFL series with improved
performance for new design applications. The AHPs
are form, fit and functional replacement to the AFL
series. The new AHP series offers a full compliment of
single and dual output voltages operating from nominal
+28V or +270V inputs with output power ranging from
66W to 120W. For applications requiring higher output
power, multiple converters can be operated in parallel.
The internal current sharing circuits assure equal current
distribution among the paralleled converters. Same as
the AFL the AHP series incorporates International
Rectifier’s proprietary magnetic pulse feedback
technology providing optimum dynamic line and load
regulation response. This feedback system samples
the output voltage at the pulse width modulator fixed
clock frequency, nominally 550KHz. Multiple converters
can be synchronized to a system clock in the 500KHz
to 700KHz range or to the synchronization output of
one converter. Undervoltage lockout, primary and
secondary referenced inhibit, soft-start and load fault
protection are provided on all models.
These converters are hermetically packaged in two
enclosure variations, utilizing copper core pins to
minimize resistive DC losses. Three lead styles are
available, each fabricated with International Rectifier’s
rugged ceramic lead-to-package seal assuring long
term hermeticity in the most harsh environments.
Manufactured in a facility fully 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.
AHP
Features
n 160V To 400V Input Range
n ±5V, ±12V, and ±15V Outputs Available
n High Power Density - up to 70W/in3
n Up To 100W Output Power
n Parallel Operation with Power Sharing
n Low Profile (0.380") Seam Welded Package
n Ceramic Feedthru Copper Core Pins
n High Efficiency - to 87%
n Full Military Temperature Range
n Continuous Short Circuit and Overload
Protection
n Output Voltage Trim
n Primary and Secondary Referenced
Inhibit Functions
n Line Rejection > 60 dB - DC to 50KHz
n External Synchronization Port
n Fault Tolerant Design
n Single Output Versions Available
www.irf.com
1
12/06/06