BQ24140_14 Datasheet, PDF (28/39 Pages) Texas Instruments – Integrated Dual-Input Switch-Mode One-Cell Li-Ion Charger with Full USB Compliance and USB-OTG Support

bq24140
SLUSAO5 – OCTOBER 2011
www.ti.com
Vender/Part/Revision Register (READ only)
Memory location: 03, Reset state: 0100 0000
BIT
B7(MSB)
B6
B5
B4
B3
B2
B1
B0(LSB)
NAME
Vender2
Vender1
Vender0
PN1
PN0
Revision2
Revision1
Revision0
Read/Write
Read only
Read only
Read only
Read only
Read only
Read only
Read only
Read only
FUNCTION
Vender Code: bit 2 (default 0)
Vender Code: bit 1 (default 1)
Vender Code: bit 0 (default 0)
00
000: Revision 1.0
Battery Termination/Fast Charge Current Register (READ/WRITE)
Memory location: 04, Reset state: 0000 0001
BIT
NAME
Read/Write
FUNCTION
B7(MSB)
Reset
Write only
Write: 1-Charger in reset mode, 0-No effect
Read: always get “0”
B6
VICHRG3
Read/Write
Charge current sense voltage: 54.4 mV (default 0)
B5
VICHRG2
Read/Write
Charge current sense voltage: 27.2 mV (default 0)
B4
VICHRG1
Read/Write
Charge current sense voltage: 13.6 mV (default 0)
B3
VICHRG0
Read/Write
Charge current sense voltage: 6.8 mV (default 0)
B2
VITERM2
Read/Write
Termination current sense voltage: 13.6 mV (default 0)
B1
VITERM1
Read/Write
Termination current sense voltage: 6.8 mV (default 0)
B0(LSB)
VITERM0
Read/Write
Termination current sense voltage: 3.4 mV (default 1)
• Charge current sense voltage offset is 37.4mV and default charge current is 550mA, if 68-mΩ sensing
resistor is used and LOW_CHG=0.
• The maximum charge current is 1.55A when charging from VIN. If a higher value is programmed, the 1.55A
or maximum safety limit charge current is selected.
Special Charger Voltage/Enable Pin Status Register
Memory location: 05, Reset state: 001X X100
BIT
NAME
Read/Write
FUNCTION
B7(MSB) NA
Read/Write
NA
B6
VIN_PRESEN Read Only
0—VIN not connected, 1—Vin present
T
B5
LOW_CHG Read/Write
0—Normal charge current sense voltage at 04H, 1—Low charge current sense voltage
of 22.1mV (default 1)
B4
DPM_STATUS Read Only
0—DPM mode is not active, 1—DPM mode is active
B3
CD_STATUS Read Only
0—CD pin at LOW level, 1—CD pin at HIGH level
B2
V_SREG2
Read/Write
Special charger voltage: 320mV (default 1)
B1
V_SREG1
Read/Write
Special charger voltage: 160mV (default 0)
B0(LSB)
V_SREG0
Read/Write
Special charger voltage: 80mV (default 0)
• Special charger voltage offset is 4.2V and default special charger voltage is 4.52V.
• Default charge current will be 325mA, if 68-mΩ sensing resistor is used, since default LOW_CHG=1.
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