We are designing a system where we have one of the following power input scenarios:
- 12V available (which will be boosted to 24V by this circuit)
- 24V available (which will directly power the 24V circuitry, hopefully not damaging the LM5123 circuitry by back-powering it some how)
- 12V and 24V available (in which case we were hoping to just use the EN pin to shut off the converter and thus break the circuit between input/output through the top FET)
Will this work?
The Vout/sense pin will have a voltage applied without other parts of the circuitry being powered on - is that fine?
Are there any other aspects of this that are worth considering?