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High efficiency, high density, PolyPhase converters for high current applications

Wei Chen

Introduction

As logic systems get larger and more complex, their supply current requirements continue to rise. Systems requiring 100A are fairly common. A high current power supply to meet such requirements usually requires paralleling several power regulators to alleviate the thermal stress on the individual power components. A power supply designer is left with the choice of how to drive these paralleled regulators: brute-force single-phase or smart PolyPhase™.

A PolyPhase converter interleaves the clock signals of the paralleled power stages, reducing input and output ripple current without increasing the switching frequency. The decreased power loss ...

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