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Analog Circuit Design Volume Three by John Hamburger, Bob Dobkin

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Chapter 223

A 4-cell NiCd regulator/charger for notebook computers

Tim Skovmand

Abstract

A 4-cell Ni-Cad regulator/charger for notebook computers is described.

Keywords

LTC1155 dual power MOSFET driver

Ni-Cad battery charger

The new LTC1155 dual power MOSFET driver delivers 12V of gate drive to two N-channel power MOSFETs when powered from a 5V supply with no external components required. This ability, coupled with its micropower current demands and protection features, makes it an excellent choice for high side switching applications which previously required more expensive P-channel MOSFETs.

A notebook computer power supply system is a good example of an application which benefits directly from this high side driving scheme. A 4-cell, ...

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