BQ25703A Datasheet, PDF (26/81 Pages) Texas Instruments – I2C Multi-Chemistry Battery Buck-Boost Charge Controller With System Power Monitor and Processor Hot Monitor

bq25703A
SLUSCU1 – MAY 2017
www.ti.com
IADP
ICRIT
Adjustable
Deglitch
IDCHG
INOM
VSRP
Ref_DCHG
Ref
20 µs
Deglitch
1.05V
10 ms
Debounce
50 Ω
PROCHOT
10 ms
<0.3V
CELL_BATPRESZ
(one shot on pin falling edge)
CMPOUT
CHRG_OK
(one shot on pin falling edge)
Copyright © 2017, Texas Instruments Incorporated
Figure 13. PROCHOT Profile
8.3.8.1 PROCHOT During Low Power Mode
During low power mode (REG0x01[7] = 1), the charger offers a low quiescent current (~150 µA) Low power
PROCHOT function uses the independent comparator to monitor battery discharge current and system voltage,
and assert PROCHOT to CPU.
Below lists the register setting to enable PROCHOT during low power mode.
• REG0x01[7] = 1
• REG0x38[5:0] = 000000
• REG0x30[6:4] = 100
• Independent comparator threshold is always 1.2 V
• When REG0x31[6] = 1, charger monitors discharge current. Connect CMPIN to voltage proportional to IBAT
pin. PROCHOT triggers from HIGH to LOW when CMPIN voltage falls below 1.2 V.
• When REG0x31[5] = 1, charger monitors system voltage. Connect CMPIN to voltage proportional to system.
PROCHOT triggers from HIGH to LOW when CMPIN voltage rises above 1.2 V.
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Copyright © 2017, Texas Instruments Incorporated