BQ25700A Datasheet, PDF (31/82 Pages) Texas Instruments – SMBus Multi-Chemistry Battery Buck-Boost Charge Controller With System Power Monitor and Processor Hot Monitor

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A
B
C
D
EF
G
t_LOW t_HIGH
SMBCLK
SMBDATA
bq25700A
SLUSCQ8 – MAY 2017
H
I
J
K
t_SU:STA t_HD:STA
t_SU:DAT
t_HD:DAT
t_SU:DAT
t_SU:STO t_BUF
A = START CONDITION
E = SLAVE PULLS SMBDATA LINE LOW
I = ACKNOWLEDGE CLOCK PULSE
A = Start condition
B = MSB of address clocked into slave
C = LSB of address clocked into slave
D = R/W bit clocked into slave
E = Slave pulls SMBDATA line low
F = ACKNOWLEDGE bit clocked into master
G = MSB of data clocked into master
H = LSB of data clocked into master
I = Acknowledge clock pulse
J = Stop condition
K = New start condition
Figure 16. SMBus Read Timing
8.6 Register Map
SMBus
ADDR
12h
14h
15h
30h
31h
32h
33h
34h
35h
20h
21h
22h
23h
24h
Table 6. Charger Command Summary
REGISTER NAME
ChargeOption0()
ChargeCurrent()
MaxChargeVoltage()
ChargeOption1()
ChargeOption2()
ChargeOption3()
ProchotOption0()
ProchotOption1()
ADCOption()
ChargerStatus()
ProchotStatus()
IIN_DPM()
ADCVBUS/PSYS()
ADCIBAT()
TYPE
R/W
R/W
R/W
R/W
R/W
R/W
R/W
R/W
R/W
R
R
R
R
R
DESCRIPTION
Charge Option 0
7-bit charge current setting
LSB 64 mA, Range 8128 mA
11-bit charge voltage setting
LSB 16 mV, Default: 1S-4192mV, 2S-8400mV,
3S-12592mV, 4S-16800mV
Charge Option 1
Charge Option 2
Charge Option 3
PROCHOT Option 0
PROCHOT Option 1
ADC Option
Charger Status
Prochot Status
7-bit input current limit in use
LSB: 50 mA, Range: 50 mA - 6400 mA
8-bit digital output of input voltage,
8-bit digital output of system power
PSYS: Full range: 3.06 V, LSB: 12 mV
VBUS: Full range: 3.2 V - 19.52 V, LSB 64 mV
8-bit digital output of battery charge current,
8-bit digital output of battery discharge current
ICHG: Full range 8.128 A, LSB 64 mA
IDCHG: Full range: 32.512 A, LSB: 256 mA
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