BQ24040 Datasheet, PDF (23/31 Pages) Texas Instruments – 800mA Single-Input Single Cell Li-Ion Battery Charger With Auto Start

bq24040
bq24041
www.ti.com.................................................................................................................................... SLUS941A – SEPTEMBER 2009 – REVISED SEPTEMBER 2009
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 Routine (bq24040)
Copyright © 2009, Texas Instruments Incorporated
Product Folder Link(s): bq24040 bq24041
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