BQ24140_14 Datasheet, PDF (26/39 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
Safety Limit Register (READ/WRITE, Write only once after reset!)
Memory location: 06, Reset state: 01000000
BIT
NAME
Read/Write
FUNCTION
B7(MSB) V_MCHRG3
Read/Write
Maximum charge current sense voltage: 54.4 mV (default 0)
B6
V_MCHRG2
Read/Write
Maximum charge current sense voltage: 27.2 mV (default 1)
B5
V_MCHRG1
Read/Write
Maximum charge current sense voltage: 13.6 mV (default 0)
B4
V_MCHRG0
Read/Write
Maximum charge current sense voltage: 6.8 mV (default 0)
B3
V_MREG3
Read/Write
Maximum battery regulation voltage: 160 mV (default 0)
B2
V_MREG2
Read/Write
Maximum battery regulation voltage: 80 mV (default 0)
B1
V_MREG1
Read/Write
Maximum battery regulation voltage: 40 mV (default 0)
B0(LSB) V_MREG0
Read/Write
Maximum battery regulation voltage: 20 mV (default 0)
• Maximum charge current sense voltage offset is 550mA (default at 950mA) and the maximum charge current
option is 1.55A, if 68-mΩ sensing resistor is used.
• Maximum battery regulation voltage offset is 4.2V (default at 4.2V) and maximum battery regulation voltage
option is 4.44V.
LED Configuration Register
Memory location: 07, Reset state: 10000010
BIT
B7(MSB)
B6
NAME
ILED1
ILED0
Read/Write
Read/Write
Read/Write
B5
NA
Read Only
B4
LED_CTRL Read/Write
B3
t_LEDON1
Read/Write
B2
t_LEDON0
Read/Write
B1
t_LEDOFF1 Read/Write
B0(LSB) t_LEDOFF0 Read/Write
FUNCTION
00 – LED Off
01 – LED current 1.25mA
10 – LED current 2.5mA (default)
11 – LED current 5mA
Returns 0
0 – LED On when charging is Active (default)
1 – LED On regardless of charging status
00 – LED On time 130ms (default)
01 – LED On time 260ms
10 – LED On time 520ms
11 – LED Constant On
00 – LED Off time 390ms
01 – LED Off time 780ms
10 – LED Off time 1560ms (default)
11 – LED Off time 3120ms
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