JAJSD78A May 2017 – May 2018
PRODUCTION DATA.
To set the output charge voltage, write a 16-bit ChargeVoltage register command (REG0x05/04()) using the data format listed in Table 25 and Table 26. The charger provides charge voltage range from 1.024 V to 19.200 V, with 16-mV step resolution. Any write below 1.024 V or above 19.200 V is ignored.
Upon POR, REG0x05/04() is by default set as 4192 mV for 1 s, 8400 mV for 2 s, 12592 mV for 3 s or 16800 mV for 4 s. After CHRG_OK, if host writes REG0x03/02() before REG0x05/04(), the charge will start after the write to REG0x03/02().If the battery is different from 4.2 V/cell, the host has to write to REG0x05/04() before REG0x03/02() for correct battery voltage setting. Writing REG0x05/04() to 0 will set REG0x05/04() to default value on CELL_BATPRESZ pin, and force REG0x03/02() to zero to disable charge.
The SRN pin is used to sense the battery voltage for voltage regulation and should be connected as close to the battery as possible, and directly place a decoupling capacitor (0.1 µF recommended) as close to the device as possible to decouple high frequency noise.
LEGEND: R/W = Read/Write; R = Read only; -n = value after reset |
I2C
05h |
FIELD | TYPE | RESET | DESCRIPTION |
---|---|---|---|---|
7 | Reserved | R/W | 0b |
Not used. 1 = invalid write. |
6 | Max Charge Voltage, bit 10 | R/W | 0b |
0 = Adds 0 mV of charger voltage. 1 = Adds 16384 mV of charger voltage. |
5 | Max Charge Voltage, bit 9 | R/W | 0b |
0 = Adds 0 mV of charger voltage. 1 = Adds 8192 mV of charger voltage |
4 | Max Charge Voltage, bit 8 | R/W | 0b |
0 = Adds 0 mV of charger voltage. 1 = Adds 4096 mV of charger voltage. |
3 | Max Charge Voltage, bit 7 | R/W | 0b |
0 = Adds 0 mV of charger voltage. 1 = Adds 2048 mV of charger voltage. |
2 | Max Charge Voltage, bit 6 | R/W | 0b |
0 = Adds 0 mV of charger voltage. 1 = Adds 1024 mV of charger voltage. |
1 | Max Charge Voltage, bit 5 | R/W | 0b |
0 = Adds 0 mV of charger voltage. 1 = Adds 512 mV of charger voltage. |
0 | Max Charge Voltage, bit 4 | R/W | 0b |
0 = Adds 0 mV of charger voltage. 1 = Adds 256 mV of charger voltage. |
I2C
04h |
FIELD | TYPE | RESET | DESCRIPTION |
---|---|---|---|---|
7 | Max Charge Voltage, bit 3 | R/W | 0b |
0 = Adds 0 mV of charger voltage. 1 = Adds 128 mV of charger voltage. |
6 | Max Charge Voltage, bit 2 | R/W | 0b |
0 = Adds 0 mV of charger voltage. 1 = Adds 64 mV of charger voltage. |
5 | Max Charge Voltage, bit 1 | R/W | 0b |
0 = Adds 0 mV of charger voltage. 1 = Adds 32 mV of charger voltage. |
4 | Max Charge Voltage, bit 0 | R/W | 0b |
0 = Adds 0 mV of charger voltage. 1 = Adds 16 mV of charger voltage. |
3-0 | Reserved | R/W | 0000b |
Not used. Value Ignored. |