AHP2805DXCH Datasheet, PDF (1/11 Pages) International Rectifier – HIGH RELIABILITY HYBRID DC/DC CONVERTERS

PD-97389
HIGH RELIABILITY
HYBRID DC/DC CONVERTERS
AHP28XXD SERIES
28V Input, Dual Output
Description
The AHP Series of DC/DC converters feature high power
density with no derating over the full military temperature
range. This series is offered as part of a complete family
of converters providing single and dual output voltages
and operating from nominal +28 or +270 volt inputs with
output power ranging from 80 to 120 watts. For
applications requiring higher output power, individual
converters can be operated in parallel. The internal
current sharing circuits assure equal current distribution
among the paralleled converters. This 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 550 KHz. Multiple
converters can be synchronized to a system clock in the
500 KHz to 700 KHz 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. Also included
is input over-voltage protection, a new protection feature
unique to the AHP.
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 available in four screening
grades to satisfy a wide range of requirements. The CH
grade is fully compliant to the requirements of MIL-PRF-
38534 for class H. The HB grade is processed and
screened to the class H requirement, but may not
necessarily meet all of the other MIL-PRF-38534
requirements, e.g., element evaluation and Periodic
Inspection (P.I.) not required. Both grades are tested to
meet the complete group “A” test specification over the
www.irf.com
AHP
Features
n 16 To 40 Volt Input Range
n ±5, ±12, and ±15 Volts Outputs Available
n High Power Density - up to 70 W / in3
n Up To 100 Watt Output Power
n Parallel Operation with Stress and Current Sharing
n Input Over-Voltage Protection
n High Efficiency - to 85%
n Continuous Short Circuit and Overload
Protection
n External Synchronization Port
n Remote Sensing Terminals
n Primary and Secondary Referenced
Inhibit Functions
n Line Rejection > 40 dB - DC to 50KHz
n Fault Tolerant Design
n Full Military Temperature Range
n Ceramic Feedthru Copper Core Pins
n Low Profile (0.380") Seam Welded Package
n Single Output Versions Available
full military temperature range without output
power deration. Two grades with more limited
screening are also avail-able for use in less
demanding applications. Variations in electrical,
mechanical and screening can be accommodated.
Contact IR Santa Clara for special requirements.
1
04/16/09