BQ25700A Datasheet, PDF (21/82 Pages) Texas Instruments – SMBus Multi-Chemistry Battery Buck-Boost Charge Controller With System Power Monitor and Processor Hot Monitor

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8.2 Functional Block Diagram
bq25700A
SLUSCQ8 – MAY 2017
CHRG_OK 4
VBUS 1
CHRG_OK_DRV
50ms Rising
Deglitch
3.9V
50ms Rising
Deglitch
EN_REGN
ACOVP
26V
ILIM_HIZ 6
ACP 2
ACN 3
IADPT 8
IBAT 9
VREF_VDPM or VREF_VOTG
VSNS_VDPM or VSYS_VOTG
Decoder
EN_HIZ
VREF_ILIM
VREF_IDPM, or VREF_IOTG
VSNS_IDPM, or VSNS_IOTG
20X**
VSNS_ICHG
VSNS_IDCHG
SRP 20
SRN 19
16X
20X**
VREF_ICHG
VSNS_ICHG
VREF_VBAT
VSNS_VBAT
Loop Selector
and
Error Amplifier
VSYS 22
VREF_VSYS
VSNS_VSYS
PWM
EN_HIZ
EN_LEARN
EN_LDO
EN_CHRG
EN_OTG
PSYS ¹⁰
SDA 12
SCL 13
EN_OTG 5
ACN
(ACP-ACN)
SRN
(SRN-SRP)
VSNS_VSYS
VSNS_VBAT
VSNS_ICHG
VSNS_IDCHG
VSNS_IDPM
VSNS_VDPM
Over
Current
Over
Voltage
Detect
SMBUS
Interface
ChargeOption0()
ChargeOption1()
ChargeOption2()
ChargeCurrent()
ChargeVoltage()
InputCurrent()
InputVoltage()
MinSysVoltage()
OTGVoltage()
OTGCurrent()
EN_HIZ
EN_LEARN
EN_LDO
EN_CHRG
EN_OTG
Loop
Regulation
Reference
VREF_VSYS
VREF_VBAT
VREF_ICHG
VREF_IDPM
VREF_VDPM
VREF_IOTG
VREF_VOTG
bq25700A Block Diagram
** programmable in register
CMP_DEG**
VREF_CMP**
14 CMPIN
15 CMPOUT
LDO Mode
Gate Control
VSYS
VSYS-10V
EN_REGN REGN
LDO
COMP1
16
17 ^COMP2
21 BATDRV
30 BTST1
31 HIDRV1
32 SW1
VDDA
7
28 ^REGN
PWM
Driver
Logic
29 LODRV1
27 PGND
25 BTST2
24 HIDRV2
23 SW2
26 LODRV2
BATPRESZ
CELL_CONFIG ^Decoder
18 CELL_BATPRESZ
IADPT
IBAT
VSYS
CHRG_OK
Processor
Hot
11 _PROCHOT
Copyright © 2017, Texas Instruments Incorporated
Copyright © 2017, Texas Instruments Incorporated
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