Hi Team
We design a protable BT speaker and use BQ24133 for the 3 cell charger.
The schematic of the charger and amplifier are enclosed as below two figure.
Now we meet a problem. plsease give some advise to solve the issue.
1.When Q4 turn off controlled by MCU control Q5, The 15V/3A adapter plug in, bq24133 can charge; then we turn on Q4, the amplifer AD82584 power on , but it don't play any audio. bq24133 can't charge, the status LED is blink. it need to plug off the adapter and then pluy in , bq24133 can reharge again.
2. When the Q4 is turned on always, the adapter plug off, then we plug in again and again, it can charge.
3. When Q4 turn on, the PVCC voltage would be drop to 11V for a short time.
