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ML1000605D Datasheet

HIGH RELIABILITY RADIATION HARDENED LOW POWER DC-DC CONVERTER

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HIGH RELIABILITY
RADIATION HARDENED
LOW POWER
DC-DC CONVERTER
PD-97806
ML1000605D
100V Input, Dual Output
Description
The ML-Series of isolated DC-DC converters for space
applications are low 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-
30-11A (ESA). Extensive documentation including worst
case analysis, radiation susceptibility, thermal analysis,
stress analysis, and reliability analysis are available.
The ML-Series converter has two outputs – one positive
and one negative - each is independently regulated via
linear post regulators. The outputs are sequenced
during turn-on and turn-off such that negative output
comes up first at turn-on and stays up at turn-off until the
positive output has decreased. The ML-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
isolated On/Off telecommand with associated status
telemetry. The converter also includes input under
voltage shut-down functionality.
Due to the linear post regulation of the outputs, the ML-
Series is well suited for use in RF-applications where
low noise, high output voltage accuracy, and high CS
attenuation is required.
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: 70mm x 50mm x
18mm. The weight is less than 50 grams.
www.irf.com
Features
n Total Dose > 100 krad(Si)
n SEE > 82 MeV.cm2/mg
n Low Weight < 50 grams
n 97V to 103V DC Input Range
n O/P 1: +6.0V (up to 500mA)
n O/P 2: -5.0V (up to 100mA)
n Output Ripple: < 1mVrms (100Hz - 50MHz)
n CS Rejection Input to Outputs: > 90dB
(50Hz - 1.0MHz)
n 10M@ 100VDC Isolation
n Input Under-Voltage Protection
n Meets Conducted Emission Requirements of
Major Power Buses:
100Hz - 100kHz: 80dBuArms
100kHz - 10MHz: -20dB/decade
10MHz - 50MHz: 40dBuArms
n Short Circuit and Overload Protection
n Meets Derating Requirements of EEE-INST
002 and ECSS-Q-30-11A
n Isolated On/Off Control via High Level Pulse
Command (Latching Relay)
n Status Telemetry (Relay Contact Type)
n Workmanship Per IPC-A610 Class 3
n Board is Coated with ARATHANE-5750
Applications
n Low Power RF Systems (like LNA) on-board
Satellites
Non-flight versions of the ML-Series converters
are available for system development purposes.
Variations in electrical specifications and
screening to meet custom requirements can be
accommodated.
1
04/22/13
http://www.Datasheet4U.com


International Rectifier Electronic Components Datasheet

ML1000605D Datasheet

HIGH RELIABILITY RADIATION HARDENED LOW POWER DC-DC CONVERTER

No Preview Available !

ML1000605D
(100V Input, Dual Output)
Circuit Description
The ML-Series converters utilize two-stage regulation
with a flyback topology with a switching frequency of
140kHz for primary regulation and linear post
regulation for each of the outputs.
The Output power is limited under any load fault
condition to approximately 120% of rated output.
An overload condition on the positive output causes
the converter output to behave like a constant current
source with the output voltage dropping below
nominal. An overload condition at the negative output
causes the positive output to shut-down in order to
protect RF-transistors in the load. The converter will
resume normal operation when the load current is
reduced below the current limit point.
An under-voltage protection circuit prohibits the
converter from operating when the line voltage is
too low for safe operation. In case of an under
voltage event the converter will not start when the
input voltage returns to its nominal level before an
Off-command followed by an On-command has been
issued.
The isolated On/Off telecommand is made with a
latching relay and is intended for use with a 26V
pulse command. A status telemetry derived from a
spare set of contacts in the relay is used for status
telemetry.
For further information please refer to the ML-Series
generic description available at www.irf.com.
Design Methodology
The ML-Series is developed using a proven
conservative design methodology, which includes
selecting radiation tolerant, and established
reliability components and full derating to the
requirements of EEE-INST-002 and ECSS-ST-11A.
2 www.irf.com
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Part Number ML1000605D
Description HIGH RELIABILITY RADIATION HARDENED LOW POWER DC-DC CONVERTER
Maker IRF
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