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| BQ24232H_15 Datasheet, PDF (21/42 Pages) Texas Instruments – bq2423xx USB-Friendly Lithium-Ion Battery Charger and Power-Path Management IC | |||
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www.ti.com
bq24230H, bq24232H
SLUSBI8A â JANUARY 2014 â REVISED DECEMBER 2014
PRECHARGE
THERMAL
REGULATION
CC FAST
CHARGE
CV TAPER
DONE
VO(REG)
IO(CHG)
Battery Voltage
Battery Current
V(LOWV)
I(PRECHG)
I(TERM)
HI-z
TJ(REG)
IC Junction Temperature, TJ
Figure 16. Modified Charge Cycle With Thermal Loop Active
9.3.5 Battery Pack Temperature Monitoring
The bq2423xH features an external battery pack temperature monitoring input. The TS input connects to the
NTC resistor in the battery pack to monitor battery temperature and prevent dangerous overtemperature
conditions.
During charging, INTC is sourced to TS and the voltage at TS is continuously monitored. If, at any time, the
voltage at TS is outside of the operating range (VCOLD to VHOT), charging is suspended. The timers maintain their
values but suspend counting. When the voltage measured at TS returns to within the operation window, charging
is resumed and the timers continue counting. When charging is suspended due to a battery pack temperature
fault, the CHG pin remains low and continues to indicate charging.
For the bq24230H, battery pack temperature sensing is disabled when termination is disabled (TD = High) and
the voltage at TS is greater than VDIS(TS). The battery pack temperature monitoring is disabled in all devices by
connecting a 10-k⦠resistor from TS to VSS.
Copyright © 2014, Texas Instruments Incorporated
Product Folder Links: bq24230H bq24232H
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