Other Parts Discussed in Thread: BQ27426
Hi Ti engineer ，
1.At present, Six anomalies have been detected in BQ27421YZFR-G1D,After D21, the output is only about 0.4V, that is, D21 pin C3 is the battery voltage, C2 is only about 0.4V, please ask whether there is any abnormality in the schematic diagram below, and what may be the cause of the failure?
2.Software:
Platform: Android 4.3
Chip: BQ27421
The driver is downloaded from the official website and can read and write registers normally after 4.3 adaptation.
The current battery Settings are as follows:
static struct bq27xxx_dm_reg bq27421_dm_regs[] = {
[BQ27XXX_DM_DESIGN_CAPACITY] = { 82, 10, 2, 0, 4300 },//8000
[BQ27XXX_DM_DESIGN_ENERGY] = { 82, 12, 2, 0, 16568 },//32767
[BQ27XXX_DM_TERMINATE_VOLTAGE] = { 82, 16, 2, 2800, 4200 },//2500 3700
};
static void bq27xxx_battery_settings(struct bq27xxx_device_info *di)
{
struct power_supply_battery_info info = {};
unsigned int min, max;
//if (power_supply_get_battery_info(di->bat, &info) < 0)
// return;
info.energy_full_design_uwh = 16568000;//7700;
info.charge_full_design_uah = 4300000;//2100
info.voltage_min_design_uv = 3300000;//3700
//info.precharge_current_ua = ;
//info.charge_term_current_ua = ;
//info.constant_charge_current_max_ua =;
//info.constant_charge_voltage_max_uv = 4350;
...
}
Please help confirm:
1. How to adjust the battery adapter
2. Check whether the read value of the register is normal
temp = 3121, volt = 4181, NAC = 3483000, FAC = 3483, RC = 3450000, FCC = 4122000, AC = 0, SC = -5, MaxLoad = 65280, AP = 0, soc = 84, dcap = 4300000, health = 1
Below are the battery specifications:
