MAH1000503R30812Q Datasheet, PDF (1/20 Pages) International Rectifier – HIGH RELIABILITY RADIATION HARDENED QUAD OUTPUT DC-DC CONVERTER

PD-97813
HIGH RELIABILITY
RADIATION HARDENED
QUAD OUTPUT
DC-DC CONVERTER
MAH1000503R30812Q
100V Input, Quad Output
Description
The MAH-Series of isolated DC-DC converters for space
applications are low to medium power radiation
hardened high reliability devices designed for hostile
radiation environments such as those encountered by
geostationary earth orbit satellites, deep space probes
and communication systems. Features include small
size, high efficiency, low weight, and a good tolerance
to total ionizing dose, single event effects, and
environmental stresses such as temperature extremes,
mechanical shock, and vibration. All components are
fully derated to meet the requirements of EEE-INST-
002 (NASA) and ECSS-Q-ST-30-11 (ESA). Extensive
documentation including worst case analysis, radiation
susceptibility, thermal analysis, stress analysis, and
reliability analysis are available.
The MAH-Series converter has four outputs – three
positive and one negative - each is independently
regulated via linear post regulators. The outputs are
sequenced during turn-on and turn-off such that the
negative output comes up first at turn-on and stays up at
turn-off until the positive outputs have decreased. The
MAH-Series converters incorporate a fixed frequency
flyback power converter and internal EMI filter that meets
the requirements for most major satellite power buses.
The converter includes input under voltage shut-down
functionality.
Due to the linear post regulation of the outputs, the MAH-
Series is well suited for use in RF-applications where
low noise, high output voltage accuracy, and high CS
attenuation is required.
Features
n Total Dose > 100 krad(Si)
n SEE > 82 MeV.cm²/mg
n Low Weight < 90 grams
n 70V to 103V DC Input Range
n O/P 1: +5.0V (up to 630mA)
n O/P 2: +5.0V (up to 530mA)
n O/P 3: -8.0V (up to 40mA)
n O/P 4: +12V (up to 60mA)
n Output Ripple: < 1mVrms (100Hz - 50MHz)
n CS Rejection Input to Outputs: > 90dB
(50Hz - 1.0MHz)
n 10MΩ @ 100VDC Isolation
n Input Under-Voltage Protection
n Meets Conducted Emission Limits:
30Hz - 60kHz: 65dBuArms
60kHz - 3.4MHz: -20dB/decade
3.4MHz - 100MHz: 30dBuArms
n Short Circuit and Overload Protection
n Meets Derating Requirements of EEE-INST
002 and ECSS-Q-ST-30-11
n Output Status Telemetry (Bi-Level)
n Temperature Telemetry (Thermistor)
n Workmanship Per IPC-A610 Class 3
n Board is Coated with ARATHANE-5750
Each converter is provided as a complete board
assembly for installation into the host equipment chassis.
The board is conformal coated (except for mating
surfaces) and is mounted in the host chassis using
screws. The board outline is L x W x H: (85mm x 71mm
x 18mm). The weight is less than 90 grams.
Non-flight versions of the MAH-Series converters are
available for system development purposes. Variations
in electrical specifications and screening to meet custom
requirements can be accommodated
www.irf.com
Applications
n Low to Medium Power RF Systems (like
Receivers, Beakons, Frequency Up and
Down Converters) On-board Satellites
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