DC/DC CONVERTER
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56500-100-5-3R3 ISOLATED DC/DC CONVERTER Preliminary Data Sheet PRODUCT PREVIEW Features: • Wide input +70VDC to +130VDC • Regulated quad output +5VDC, +3.3VDC, and ±12V; or tri-output +5VDC, and ±12V • 20 Watts total power • 250kHz fixed frequency input • Internally synchronized • Over current protection • Input under-voltage lockout • Output enable • Power good status • Power Bus Disconnect Applications: • 100VDC spacecraft power systems • Radiation Hard Environment • 100kRAD (Si) TID • 50kRad (Si) ELDRS • 86 MeV/(mg/cm2) SEE • MIL-STD-975 internal de-rating criteria • Operating Temperature -55oC to 125oC • Storage Temperature -65oC to 150oC product status This document contains information on a product under development. Micropac reserves the right to change or discontinue this product without notice. DESCRIPTION The 56500 is a radiation compliant isolated DC-DC converter designed for demanding satellite and spacecraft power distribution systems. It is fully characterized for expected radiation environments. RADIATION CRITERIA ABSOLUTE maximum RATINGS ELECTRICAL SPECIFICATIONS Tc = -55°C to 125°C, Vin = 100VDC ±5%; unless otherwise specified. Micropac Industries cannot assume any responsibility for any circuits shown or represent that they are free from patent infringement. Micropac reserves the right to make changes at any time in order to improve design and to supply the best product possible. MICROPAC INDUSTRIES, INC.» 905 E. Walnut St., Garland, TX 75040 • (972) 272-3571 • Fax (972) 494-2281 www.micropac.com E-MAIL: sales@micropac.com 03 April 2014 Rev G ©2014

56500-100-5-3R3 ISOLATED DC/DC CONVERTER Micropac Industries cannot assume any responsibility for any circuits shown or represent that they are free from patent infringement. Micropac reserves the right to make changes at any time in order to improve design and to supply the best product possible. MICROPAC INDUSTRIES, INC.* 905 E. Walnut St., Garland, TX 75040 • (972) 272-3571 • Fax (972) 494-2281 www.micropac.com E-MAIL: microsales@micropac.com 3 April 2014 Rev G ©2012 - 2014

ISOLATED DC/DC CONVERTER 1. Bus Disconnect Current steady state is the maximum average current before the Converter is disconnected from the Bus. Reset is achieved by cycling the Control OFF / then ON. 2. Peak Current allowed from Power In with an I2t response from no load. Peak value is less when current surges occur from operating currents. 3. No-load operation will not cause excessive over voltage or damage. 4. Output ripple measured as <1% Peak-Peak of nominal output / frequency domain of 100Hz – 50 MHz. 5. A minimum of 500µfd distributed capacity is required for the specified minimum...

ISOLATED DC/DC CONVERTER DESIGN TOPOLOGY The DC-DC Converter consists of a Push-Pull isolated converter feeding an internal 3.3V and 5.0V synchronized buck regulators, and ±12VDC linear regulators. The combined operating output power for the 3.3VDC, 5VDC, and ±12VDC converters is limited to a total rated power of 20 watts. Galvanic isolation is provided between Power Bus, base plate and the regulated outputs using magnetic and optical networks. I2t FAULT BUS PROTECTION The 11 fault bus protection circuit provides converter over-current protection and bus protection in the event of converter...

ISOLATED DC/DC CONVERTERMECHANICAL FEATURES • Mass: Estimated, 100gm (3.5oz) • Estimated Cavity Dimensions:, 1.9in x 1.9in x 0.400in. Dimensions may change in final layout & package design. • Final dimensions and pin-out to be determined. ORDERING INFORMATION EXPORT CLASSIFICATION An export license has not yet been obtained. Contact the factory for further information. Micropac Industries cannot assume any responsibility for any circuits shown or represent that they are free from patent infringement. Micropac reserves the right to make changes at any time in order to improve design and to...