MOSFET controller boosts PSU efficiency for Energy Star 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.
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