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BQ24140_14 Datasheet, PDF (25/39 Pages) Texas Instruments – Integrated Dual-Input Switch-Mode One-Cell Li-Ion Charger with Full USB Compliance and USB-OTG Support
bq24140
www.ti.com
SLUSAO5 – OCTOBER 2011
Vender/Part/Revision Register (READ only)
Memory location: 03, Reset state: 0101 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)
10
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: 27.2mV
B5
VICHRG2
Read/Write
Charge current sense voltage: 13.6mV
B4
VICHRG1
Read/Write
Charge current sense voltage: 6.8mV
B3
VICHRG0
Read/Write
Charge current sense voltage: NA
B2
VITERM2
Read/Write
Termination current sense voltage: 13.6mV (default 0)
B1
VITERM1
Read/Write
Termination current sense voltage: 6.8mV (default 0)
B0(LSB) VITERM0
Read/Write
Termination current sense voltage: 3.4mV (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 1.25A (Rsns=68mΩ) when charging from VBUS. If a higher value is
programmed, the 1.25A 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
VBUS_PRESENT Read Only
0—VBUS not connected, 1—VBUS present
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
VIN_PRESENT Read Only
0—VIN not connected, 1—Vin present
B2
VSREG2
Read/Write Special charger voltage: 320 mV (default 1)
B1
VSREG1
Read/Write Special charger voltage: 160 mV (default 0)
B0(LSB) VSREG0
Read/Write Special charger voltage: 80 mV (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.
Copyright © 2011, Texas Instruments Incorporated
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