1) Power from USB 5 volts. I press the "on" button. Transistor VT1 does not open (+ VBat = 1 V).
2) Power from battery 6 volts. I press the "on" button. Transistor VT2 opens (+ VBat = 6 V).
Tell me why the power from USB does not turn on?
LTC4417
Recommended for New Designs
The LTC4417 connects one of three valid power supplies to a common output based on priority. Priority is defined by pin assignment, with V1 assigned the...
Datasheet
LTC4417 on Analog.com
1) Power from USB 5 volts. I press the "on" button. Transistor VT1 does not open (+ VBat = 1 V).
2) Power from battery 6 volts. I press the "on" button. Transistor VT2 opens (+ VBat = 6 V).
Tell me why the power from USB does not turn on?
Problem solved. The reason was poor voltage filtering of the USB adapter. Replacing the adapter solved all the problems.