BQ24450 BATTERY CHARGER

WILLIE MCCAIN

HELLO I NEED TO NO IF I CAN CHANGE Qext WITH A N-CH MOSFET ARE WHAT PINS

DO I NEED TO USE UN ORDER TO USE A N-CH MOSFET

GET BACK PLEASE ASAP IAM STUCK HERE I NEED TO MAKE SURE BEFORE I GO ON WITH THE LAYOUT

THANKS ,

WILLIE L. MCCAIN

0 Michael Mellitt over 12 years ago

Willie,

The reference design recommends a PNP BJT for Qext. I do not think that a N-CH Mosfet would work without significantly changing the design.

Regards,

Mike

0 Charles Mauney over 12 years ago in reply to Michael Mellitt

Yes, an N-CH FET would require something to generate a higher voltage drive.

0 WILLIE MCCAIN over 12 years ago in reply to Charles Mauney

OKAY ARE YOU SAYING I NEED TO ADD A HIGH SIDE DRIVER

THE COLLECTOR WILL BE TO THE INPUT AND I WILL USE THE EMITTER OUTPUT TO THE DRIVER INPUT

AND FROM THERE THE DRAIN TIED TO THE SAME POINT AS THE COLLECTOR AND THE SOURCE OF THE MOSFET

WILL BE THE OUTPUT

LET ME NO

THANKS

WILLIE

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