New Products
MOSFET controller boosts PSU efficiency for Energy Star rating
December 15, 2011 | Paul Buckley | 222903863
Diodes Incorporated has unveiled a 25 V rated synchronous MOSFET controller for notebook and laptop power supply designs of 90 W and above. By enabling the replacement of inefficient Schottky diodes in flyback converters, the ZXGD3104N8 increases power supply efficiency by up to 3.5% through a reduction in rectifier losses of up to 70%. As a result, the device helps power supplies more easily attain the 87% Energy Star V2.0 rating.
With its wide operating voltage range of 5 V to 25 V, this SO8 packaged MOSFET controller is able to be directly powered from the adaptor’s 19 V supply rail, while ensuring sufficient headroom in the event of transient over-voltage conditions.
Combined with the device’s direct 180 V MOSFET drain-sense capability which eliminates the need for an external clamp circuit, designers can reduce component count and save space.
The ZXGD3104N8’s proportional gate-drive operation guards against premature MOSFET turn-off as the drain current decays, thereby maximizing circuit
efficiency and ensuring body diode conduction losses are minimized. This, combined with the short turn-off propagation delay of typically 15 ns, helps to
maximize power supply circuit efficiency.
Visit Diodes at www.diodes.com
Combined with the device’s direct 180 V MOSFET drain-sense capability which eliminates the need for an external clamp circuit, designers can reduce component count and save space.
The ZXGD3104N8’s proportional gate-drive operation guards against premature MOSFET turn-off as the drain current decays, thereby maximizing circuit
efficiency and ensuring body diode conduction losses are minimized. This, combined with the short turn-off propagation delay of typically 15 ns, helps to
maximize power supply circuit efficiency.
Visit Diodes at www.diodes.com
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