31 Dec '11, 2am

MOSFET controller increases PSU efficiency for Energy Star

MOSFET controller increases PSU efficiency for Energy Star

Diodes has announced a 25V rated synchronous MOSFET controller for notebook and laptop power supply designs of 90W and above. The ZXGD3104N8 is claimed to increase power supply efficiency by up to 3.5% through a reduction in rectifier losses of up to 70% and thus help power supplies attain the 87% Energy Star V2.0 rating. With an operating voltage range of 5 to 25V, this SO8 packaged MOSFET controller can be directly powered from the adaptor’s 19V supply rail. It features direct 180V MOSFET drain-sense capability which eliminates the need for an external clamp circuit, according to the company. The MOSFET controller’s proportional gate-drive operation guards against premature MOSFET turn-off as the drain current decays, which helps in maximising circuit efficiency and minimising body diode conduction losses. It also features short turn-off propagation delay of typically 15ns.

Full article: http://www.edn-europe.com/mosfetcontrollerincreasespsueff...

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