08/27/13

www.irf.com

1

Description

n 18 to 40V DC Input Range

n Total Ionization Dose > 100K Rad(Si)

n SEE Hardened to LET (Heavy Ions) up to

n Internal EMI filter; Converter Capable of

meeting MIL-STD-461C CE03

n Derated per MIL-STD-1547, MIL-STD-975

and NASA EEE-INST-002

n Magnetically Coupled Feedback

n Up to 30W Output Power

n Single and Dual Output Models Include

1.5, 1.8, 2.5, 3.3, 5, 12, 15,

±5, ±12 and ±15V

n Remote Sense Compensation for Single

Output

n Latch-off Output Overvoltage Protection

n Input Current Telemetry

n Input Undervoltage Lockout with Latching

Mode Options

n

High Efficiency - to 81%

n 20MΩ @ 100VDC Isolation

n Undervoltage Protection

n Short Circuit and Overload Protection

n Adjustable Output Voltage

n Adjustable External OVP-115% to 125%

n External Inhibit

n Low Weight, < 125 grams

n 4000000 Hour MTBF (SF)

Features

Applications

The LSO Series of DC-DC converters are, high reliability

devices designed for hostile radiation hardened

environments. The design is based on the heritage-rich

LS Series with enhanced functional performance and

an inclusion of an output overvoltage protection. The

LSO Series provide up to 30 watts output power, small

size, low weight, integrated EMI filtering and a high

tolerance to environmental stresses such as radiation,

temperature extremes, mechanical shock, and vibration.

All components are fully de-rated to meet the requirements

of MIL-STD-1547, MIL-STD-975 and NASA EEE-INST-

002. Extensive documentation including, thermal

analysis, stress analysis and reliability predictions are

available.

The LSO Series of converters incorporate a fixed

frequency single forward topology with magnetic

feedback and an internal EMI filter. These converters

are capable of meeting the conducted emissions

requirements of MIL-STD-461C without any additional

components. All models include an external inhibit port

and have an adjustable output voltage. The converters

are overload, short circuit and output over-voltage

protected. They are enclosed in a hermetic 3.5" x 2.5" x

0.475" H steel package and weigh less than 125 grams.

The package utilizes rugged ceramic feed-through

copper core pins and is sealed using parallel seam

welding.

Variations in electrical specifications and screening to

meet custom requirements can be accommodated.

n Geo Synchronous Satellite

n Low Earth Orbit

n Deep Space Probe

n Communication and Display Systems

n Payload and Experiment LVPS

LSO SERIES

28V Input, Single/Dual Output

HYBRID-HIGH RELIABILITY

RADIATION HARDENED

DC-DC CONVERTER

Manufactured in a facility fully qualified to MIL-PRF-

38534, these converters are fabricated utilizing DLA

qualified processes. For available screening options,

refer to device screening table in the data sheet.

LSO

PD-97812