There are several options that can be considered:
- Applying power to CHGIN (plugging in a charger) also wakes up the PMIC
- The microcontroller can then set the desired to channel to always be on (EN_SBBx = 0x6)
- Some MAX77654 options include a channel that turns on as soon as the battery is connected. These options are listed in the datasheet under the Part Number Decode section
- MAX77654B
- SBB1 = 1.8V
- MAX77654M
- SBB0 = 1.8V
- SBB1 = 1.1V
- SBB2 = 3.3V
- MAX77654B