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Zetex's P-channel MOSFETs reduce size of active clamp designs

Posted: 16 Nov 2005 ?? ?Print Version ?Bookmark and Share

Keywords:mosfet? zetex semiconductors? zxmp2120e5? zxmp2120g4?

p-channel MOSFETs

The SOT23- and SOT223-packaged 200V rated p-channel MOSFETs from Zetex Semiconductors promise to significantly reduce the size of active clamp designs previously reliant on larger DPAK and SO8 packages.

Two miniature devices are initially offered, the ZXMP2120E5 in the 5-pinned SOT23 package, and the ZXMP2120G4 in the 4-pinned SOT223. According to Zetex, the inter-pin spacing of both package outlines has been maximized 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, added the company, the ZXMP2120 MOSFETs will 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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