BQ24050 Datasheet, PDF (26/37 Pages) Texas Instruments – 800mA Single Cell Li-Ion Battery Charger With Automatic Adaptor/USB Detection

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SLUS940A – SEPTEMBER 2009 – REVISED SEPTEMBER 2009.................................................................................................................................... www.ti.com
Start
BATT _DETECT
Start 25ms timer
No
Timer Expired?
Yes
Yes
Is VOUT<VREG-100mV?
Battery Present
Turn off Sink Current
Return to flow
No
Set OUT REG
to VREG-400mV
Enable sink current
Reset & Start 25ms timer
No
Timer Expired?
Yes
Yes
Battery Present
Is VOUT>VREG-300mV?
Turn off Sink Current
Return to flow
No
Battery Absent
Don’t Signal Charge
Turn off Sink Current
Return to Flow
Figure 28. Battery Detect Flow Diagram
26
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