BQ24735_17 Datasheet, PDF (22/46 Pages) Texas Instruments – 1- to 4-Cell Li+ Battery SMBus Charge Controller for Supporting Turbo Boost Mode With N-Channel Power MOSFET Selector

bq24735
SLUSAK9B – SEPTEMBER 2011 – REVISED APRIL 2015
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9.6 Register Maps
9.6.1 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 0x001BH.
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
0x001BH
9.6.2 Setting Charger Options
By writing ChargeOption() command (0x12H or 0b00010010), bq24735 allows users to change several charger
options after POR (Power On Reset) as shown in Table 3.
9.6.3 Charge Options Register [reset = 0x12H]
Figure 15. Charge Options Register
15
ACOK Deglitch
Time Adjust
14
13
WATCHDOG Timer Adjust
12
11
BAT Depletion Comparator
Threshold Adjust
10
EMI Switching
Frequency
Adjust
R/W
R/W
R/W R/W
7
6
5
4
IFAULT_LOW
Comparator
Threshold
Adjust
LEARN Enable IOUT Selection
AC Adapter
Indication
(Read Only)
R/W
R/W
R/W
R/W
LEGEND: R/W = Read/Write; R = Read only; -n = value after reset
3
BOOST Enable
R/W
R/W
2
Boost Mode
Indication
(Read Only)
R/W
9
EMI Switching
Frequency
Enable
R/W
1
ACOC
Threshold
Adjust
R/W
8
IFAULT_HI
Comparator
Threshold
Adjust
R/W
0
Charge Inhibit
R/W
Table 3. Charge Options Field Descriptions
Bit Field
[15] ACOK Deglitch Time Adjust
Type
Reset Description
R/W Adjust ACOK deglitch time.
After POR, the first time the adapter plug in occurs, deglitch time is
always 150 ms no matter if this bit is 0 or 1. This bit only sets the
next ACOK deglitch time after ACFET turns off at least one time. To
change this option, VCC pin voltage must be above UVLO and
ACDET pin voltage must be above 0.6 V to enable IC SMBus
communication.
0: ACOK rising edge deglitch time 150 ms
1: ACOK rising edge deglitch time 1.3 s <default at POR>
22
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