GaN Single Stage Isolated Converters

By converting power straight from the power bus to the point of load, the new GaN single-stage converters operate easily within the increasingly stringent voltage tolerances of today’s leading-edge processing devices. This includes deep-submicron ASICs and FPGAs used in software-defined payloads that can be reprogrammed in-orbit to extend the mission life of space applications.

The 28V radiation-tolerant converters are also the first satellite single stage power supplies to incorporate gallium-nitride (GaN) FET technology. These GaN-based converters provide customers with a unique, fully-tested, off-the-shelf power conversion solution.

The move to GaN enables higher performance and switching frequencies, thereby improving response time to changing load currents compared to silicon-based DC-DC converters. These new converters can also be used in parallel for higher-power applications.

28V GaN, Single-Stage, Isolated DC-DC Converter

The Frontgrade Single Stage DC-DC Converter is an efficient isolated step-down regulator rated at 50-72 Watts. Output voltage remote sense provides accurate point of load voltage regulation.

The converter design is a single ended forward converter with secondary synchronous rectification.

* Can be paralleled for higher power applications
Part Number	V_in (V)	V_out (V)	Pout (W) MAX	I_out (A) MAX	Efficiency (typ) (%)
SCD51028080	20-38	0.7-0.8	50*	54.0	89
SCD51028100	20-38	0.8-1.0	50*	50.0	91
SCD51028120	20-38	1.0-1.2	50*	41.0	91
SCD51028180	20-38	1.5-1.8	64*	35.0	91
SCD51028330	20-38	2.5-3.3	75*	22.0	92
SCD51028500	20-38	4.0-5.0	60*	12.00	92
SCD51028700	20-38	5.0-7.0	50*	7.00	93