We use the LP8867Q1EVM and connect to our backlight. (4S8P) Vout~20V
1. When I use Vin = 12V Iin =~1A
2. When I use Vin = 9V and Iin will increase to 3A
3. When I use Vin = 8V and IC will shutdown.
We have check the Vin is correct. (measure the IC input cap)
Could you let me know the possible factor that cause this issue? or what point should I check?