BQ24705_15 datasheet(12/32 Pages) TI1

Part #	BQ24705

Description	Host-Controlled Multi-Cell Battery Charger

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Manufacturer	TI1 [Texas Instruments]

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t − Time=5ms/div

I

BAT

V

PH

V

BAT

t − Time=2ms/div

V

REF

V

REGN

V

ACDET

t − Time=4ms/div

VCHGEN

VPH

I

BAT

VBAT

V

BAT

t − Time=200 s/div

m

V

IN

I

L

t − Time=1 s/div

m

PH

LDRV

IL

t − Time=1 s/div

m

PH

LDRV

IL

bq24705

SLUS779B – DECEMBER 2007 – REVISED MARCH 2009............................................................................................................................................... www.ti.com

BATTERY REMOVAL

REF AND REGN STARTUP

Figure 18.

Figure 19.

CHARGE ENABLE / DISABLE AND CURRENT

CHARGER ON ADAPTER REMOVAL

SOFT-START

Figure 20.

Figure 21.

NONSYNCHRONOUS TO SYNCHRONOUS TRANSITION

SYNCHRONOUS TO NONSYNCHRONOUS TRANSITION

Figure 22.

Figure 23.

BATTERY SHORTED CHARGER RESPONSE,

NEAR 100% DUTY CYCLE BOOTSTRAP RECHARGE

OVERCURRENT PROTECTION (OCP) AND CHARGE

PULSE

CURRENT REGULATION

Figure 24.

Figure 25.

12

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