BQ24735 Datasheet, PDF (17/42 Pages) Texas Instruments – 1-4 Cell Li+ Battery SMBus Charge Controller for Supporting Turbo Boost Mode with N-Channel Power MOSFET Selector

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bq24735
SLUSAK9 – SEPTEMBER 2011
A
B
t_LOW t _HIGH
SMBCLK
SMBDATA
Figure 19. SMBus Write Timing
C
D
EF
G
H
I
J
K
A = START CONDITION
B = MSB OF ADDRESS CLOCKED INTO SLAVE
C = LSB OF ADDRESS CLOCKED INTO SLA VE
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
Figure 20. SMBus Read Timing
I = ACKNOWLEDGE CLOCK PULSE
J = STOP CONDITION
K = NEW START CONDITION
Battery-Charger Commands
The bq24735 supports six battery-charger commands that use either Write-Word or Read-Word protocols, as
summarized in Table 2. ManufacturerID() and DeviceID() can be used to identify the bq24735. The
ManufacturerID() command always returns 0x0040H and the DeviceID() command always returns 0x000BH.
REGISTER ADDRESS
0x12H
0x14H
0x15H
0x3FH
0XFEH
0xFFH
Table 2. Battery Charger Command Summary
REGISTER NAME
ChargeOption()
ChargeCurrent()
ChargeVoltage()
InputCurrent()
ManufacturerID()
DeviceID()
READ/WRITE
Read or Write
Read or Write
Read or Write
Read or Write
Read Only
Read Only
DESCRIPTION
Charger Options Control
7-Bit Charge Current Setting
11-Bit Charge Voltage Setting
6-Bit Input Current Setting
Manufacturer ID
Device ID
POR STATE
0xF902H
0x0000H
0x0000H
0x1000H
0x0040H
0x000BH
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