Semiconductors
Zetex – High-voltage P-channel MOSFETs shrink active clamps
Nov 24 2005 - Semiconductors [More Semiconductors Articles]Housed in space-saving SOT23 and SOT223 packages, new 200V rated P-channel
MOSFETs, from Zetex Semiconductors, are designed to significantly reduce the
size of active clamp designs previously reliant on much larger DPAK and SO8
packages.
Two miniature devices are initially offered, the ZXMP2120E5 in the 5-pinned
SOT23, and the ZXMP2120G4 in the novel 4-pin SOT223. The inter-pin spacing
of both package outlines has been maximised in order to maintain resistance
to high-voltage creepage.
In addition, the low gate capacitance P-channel process used in the MOSFETs´
manufacture ensures ringing is reduced during the switching transient and
very low-noise performance is achieved. As P-channel circuitry is simpler to
implement than N-channel, the ZXMP2120 MOSFETs can enable designers to
produce lower cost active clamps in smaller form factor 48V DC-DC forward
converters in telecom and server applications.
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