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| BQ24230H_14 Datasheet, PDF (26/38 Pages) Texas Instruments – USB-Friendly Lithium-Ion Battery Charger and Power-Path Management IC | |||
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bq24230H
bq24232H
SLUSBI8 â JANUARY 2014
www.ti.com
Turn
Q2 OFF
tREC(SC2)
Force
Q2 ON
Turn
Q2 OFF
tREC(SC2)
Force
Q2 ON
VBAT - VOUT
VO(SC2)
Recover
t < tDGL(SC2) tDGL(SC2)
tDGL(SC2)
t < tDGL(SC2)
Figure 30. OUT Short-Circuit â Supplement Mode
VCOLD
VCOLD - Vhys(COLD)
VHOT - Vhys(HOT)
VHOT
VTS
t < tDGL(TS)
tDGL(TS)
Suspend
Charging
Resume
Charging
Figure 31. Battery Pack Temperature Sensing â TS Pin. Battery Temperature Increasing
bq24232H CHARGER DESIGN EXAMPLE
See Figure 25 for the Design Example Schematic.
Requirements
⢠Supply voltage = 5 V
⢠Fast-charge current of approximately 200 mA; ISET - pin 16
⢠Input Current Limit =500 mA; ILIM - pin 12
⢠Termination Current = 25 mA - pin 15
⢠Safety timer duration, Fast charge = 6.25 hours; TMR â pin 14
⢠TS â Battery Temperature Sense = 10 k⦠NTC (103AT-2)
Calculations
Program the Fast-Charge Current (ISET):
RISET = KISET / ICHG
26
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Product Folder Links: bq24230H bq24232H
Copyright © 2014, Texas Instruments Incorporated
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