BQ24765 Datasheet, PDF (29/36 Pages) Texas Instruments – SMBus-Controlled Multi-Chemistry Battery Charger With Integrated Power MOSFETs

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bq24765
SLUS999 – NOVEMBER 2009
REMOTE SENSE
The bq24765 has a dedicated remote sense pin, VFB, which allows the rejection of board resistance and
selector resistance. To fully utilize remote sensing, connect VFB directly to the battery interface through an
unshared battery sense Kelvin trace, and place a 0.1µF ceramic capacitor near the VFB pin to AGND.
Remote Kelvin Sensing provides higher regulation accuracy, by eliminating parasitic voltage drops. Remote
sensing cancels the effect of impedance in series with the battery. This impedance normally causes the battery
charger to prematurely enter constant-voltage mode with reducing charge current.
Copyright © 2009, Texas Instruments Incorporated
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