BQ24296_15 Datasheet, PDF (24/55 Pages) Texas Instruments – bq2429x I2C Controlled 3-A Single Cell USB Charger With Narrow VDC Power Path Management and Adjustable Voltage USB OTG

bq24296, bq24297
SLUSBP6B – SEPTEMBER 2013 – REVISED NOVEMBER 2014
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To initiate a charge cycle, the battery temperature must be within the V_LTF to V_HTF thresholds. During the charge
cycle the battery temperature must be within the V_LTF to V_TCO thresholds, else the device suspends charging and
waits until the battery temperature is within the V_LTF to V_HTF range.
For battery protection during boost mode, the device monitors the battery temperature to be within the VBCOLDx
to VBHOTx thresholds unless boost mode temperature is disabled by setting BHOT bits (REG06[3:2]) to 11.
When temperature is outside of the temperature thresholds, the boost mode is suspended and REG08[7:6] bits
(VBUS_STAT) are set to 00. Once temperature returns within thresholds, the boost mode is recovered.
REGN
bq24296
bq24297
TS
RT1
RT2
RTH
103AT
Figure 17. TS Resistor Network
When the TS fault occurs, the fault register REG09[2:0] indicates the actual condition on each TS pin and an INT
is asserted to the host. The STAT pin indicates the fault when charging is suspended.
VREF
TEMPERATURE RANGE TO
INITIATE CHARGE
TEMPERATURE RANGE
DURING A CHARGE CYCLE
VREF
CHARGE SUSPENDED
V_LTF
CHARGE SUSPENDED
V_LTF
V_LTFH
V_LTFH
CHARGE at full C
CHARGE at full C
V_HTF
AGND
CHARGE SUSPENDED
CHARGE SUSPENDED
V_TCO
AGND
Figure 18. TS Pin Thermistor Sense Thresholds in Charge Mode
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