Datasheet

bq24010, bq24012
bq24013, bq24014, bq24018
SLUS530K –SEPTEMBER 2002–REVISED JANUARY 2014 www.ti.com
TIMER FAULT RECOVERY
As shown in Figure 5, bqTINY provides a recovery method to deal with timer fault conditions. The following
conditions summarize this method.
Condition 1: Charge voltage above recharge threshold (V
(RCH)
) and timeout fault occurs
Recovery method: bqTINY waits for the battery voltage to fall below the recharge threshold. This could happen
as a result of a load on the battery, self-discharge, or battery removal. Once the battery falls below the recharge
threshold, the bqTINY clears the fault and enters the battery absent detection routine. A POR or CE toggle also
clears the fault.
Condition 2: Charge voltage below recharge threshold (V
(RCH)
) and timeout fault occurs.
Recovery method: Under this scenario, the bqTINY applies the I
(FAULT)
current. This small current is used to
detect a battery removal condition and remains on as long as the battery voltage stays below the recharge
threshold. If the battery voltage goes above the recharge threshold, then the bqTINY disables the I
(FAULT)
current
and executes the recovery method described for condition #1. Once the battery falls below the recharge
threshold, the bqTINY clears the fault and enters the battery absent detection routine. A POR or CE toggle also
clears the fault.
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