Part Number: BQ25703A
Hi TI experts,
I am using the BQ25703A and having difficulty getting the charge current beyond ~ 100 mA. This is regardless of the register 03/02 setting. My setup is input voltage = 5 volts and Cell_BATPRES = 2S. At power up, all appears to be well according to the default register values. They are displayed below.
=> i2c md 0x6b 0x00
0000: 0e e2 00 00 d0 20 00 00 00 00 c0 01 00 18 00 41
When I do the following steps, the battery is charging and VSYS climbs from 7.5 to 7.97 (after an hour) volts but I am unable to get more than ~100mA to the battery. I wish to charge the battery at .4 amps. Here are the registers I am writing:
*/* set charge current = .4 amps
I2C mw 0x6B 0x02 0xC0
I2C mw 0x6B 0x03 0x01
*/* set the charge inhibit to start charging & disable watchdog timer
I2C mw 0x6B 0x00 0x02
I2C mw 0x6B 0x01 0x00
I am new to this device. Can you check the schematics and let me know if I should be programming other registers to perform a fast charge at .4 amps?
Thanks,
Jmast2