This project is used to verify the solution verification board design of Lichuang Mall’s battery power management chip CN302
This solution provides an alternative primary and secondary power switching method.
Low cost, the main chip cost is negligible. The cost is all on MOS. This solution uses 5V input because the chip power supply is only 6v. Therefore, the secondary power supply input cannot be greater than 6V.
When only the main power is input, the main power is output to the rear stage through two back-to-back MOS outputs.
When there is a secondary power input, it automatically switches to the secondary power supply and at the same time closes the main power MOS channel.
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