BQ24170 Datasheet, PDF (26/35 Pages) Texas Instruments – 1.6-MHz Synchronous Switch-Mode Li-Ion and Li-Polymer Stand-Alone Battery Charger

bq24170
bq24172
SLUSAD2A – NOVEMBER 2010 – REVISED NOVEMBER 2010
Table 3 provides a summary of typical LC components for various charge currents.
Table 3. 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
www.ti.com
4A
2.2 µH
30 µF
CHARGE STATUS OUTPUTS
The open-drain STAT outputs indicate various charger operations as listed in Table 4. 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 4. 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
26
Submit Documentation Feedback
Product Folder Link(s): bq24170 bq24172
Copyright © 2010, Texas Instruments Incorporated