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OPERATIONAL FLOW CHART

Battery

Detect?

TS Pin

in LTF to HTF

Range?

Indicate CHARGE

SUSPEND

No

V

Yes

No

V

T30min

Expired?

No

Yes

Indicate Fault

Battery

Replaced?

(Vbat < Vrch?)

Yes

No

Yes

FSTCHG Timer

Expired?

No

Suspend Charge

Indicate Charge-

In-Progress

Regulate

I

PRECHG

Indicate Charge-

In-Progress

Regulate

Current or Voltage

Indicate BATTERY

ABSENT

Check for Battery

Presence

No

Reset and Start

T30min timer

TS pin

in LTF to TCO

range?

Indicate CHARGE

SUSPEND

No

Suspend Charge

POR

Yes

Yes

Reset and Start

FSTCHG timer

TS Pin

in LTF to TCO

Range?

I

Yes

Yes

V

No

Indicate DONE

Charge Complete

Yes

V

No

No

- Fault Condition

- Enable I

DETECT

No

Yes

Yes

TS pin

in LTF to HTF

range?

No

TS pin

in LTF to HTF

range?

Indicate CHARGE

SUSPEND

Suspend Charge

No

No

Indicate Charge-

In-Progress

- Turn Off Charge

- Enable I

t

DISCHG2

Indicate BATTERY

ABSENT

Battery Removed

Yes

Yes

Yes

*

*NOTE: If the TTC pin is

pulled low, the safety timer

and termination are

disabled; the charger

continues to regulate, and

the STAT pins indicate

charge in progress.

If the TTC pin is pulled high

(VTSB), only the safety

timer is disabled

(termination is normal).

bq24100, bq24103, bq24103A

bq24105, bq24108, bq24109

bq24113, bq24113A, bq24115

SLUS606K – JUNE 2004 – REVISED NOVEMBER 2007

Figure 7. Stand-Alone Version Operational Flow Chart

Copyright © 2004–2007, Texas Instruments Incorporated

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Product Folder Link(s): bq24100, bq24103, bq24103A bq24105, bq24108, bq24109 bq24113, bq24113A, bq24115