BQ24171 Datasheet, PDF (24/35 Pages) Texas Instruments – JEITA Compliant Stand-Alone Switch-Mode Li-Ion and Li-Polymer Battery Charger with Integrated MOSFETs and Power Path Selector

bq24171
SLUSAF2A – FEBRUARY 2011 – REVISED MAY 2011
Table 2 provides a summary of typical LC components for various charge currents.
Table 2. Typical Values as a Function of Charge Current
CHARGE CURRENT
Output inductor L
Output capacitor C
1A
6.8 µH
10 µF
2A
3.3 µH
20 µF
3A
3.3 µH
20 µF
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4A
2.2 µH
30 µF
CHARGE STATUS OUTPUTS
The open-drain STAT outputs indicate various charger operations as listed in Table 3. These status pins can be
used to drive LEDs or communicate with the host processor. Note that OFF indicates that the open-drain
transistor is turned off.
Table 3. STAT Pin Definition
CHARGE STATE
Charge in progress (including recharging)
Charge complete, Sleep mode, Charge disabled
Charge suspend, Input over-voltage, Battery over-voltage, timer fault, , battery absent
STAT
ON
OFF
BLINK
24
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