BQ29311PW datasheet(8/19 Pages) TI

Part #	BQ29311PW

Description	THREE AND FOUR CELL LITHIUM ION OR LITHIUM POLYMER BATTERY PROTECTION IC

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Manufacturer	TI [Texas Instruments]

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bq29311

SLUS487D − DECEMBER 2001 − REVISED NOVEMBER 2003

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8

APPLICATION INFORMATION

PRECHARGE MODE CURRENT LIMITING RESISTOR SELECTION

The selection of this resistor value should take into account the maximum potential charge voltage, which should include

the voltage of a failed charger to ensure that 0-V and pre-charge mode current levels are within desirable limits under all

conditions.

UDG−01148

22

PCHG

RDS(ON)

I(PCHG)

BAT

PACK+

R(PCHG)

I

(PCHG) +

V

PACK(max) * VBAT(min)

R

DS(ON) ) R(PCHG)

Figure 1. Pre-Charge Mode Current Limiting Resistor Selection

This method ensures that the resistor is sized correctly to provide safe zero voltage charging and the optimal performance

during precharge.

Similar Part No. - BQ29311PW

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