413 - How do I implement Power-Off Detection in a Power Manager II device ?

413 - How do I implement Power-Off Detection in a Power Manager II device ?

The Power Off Detection is used to sense when a supply (or set of supplies) is fully discharged before re-cycling the power-on or re-start sequence.  Many devices require the supplies to be fully off before applying power and a Power Off Detection function provides the ability to sense when a supply is discharged to a safe level.

In order to implement Power Off Detection in a Power Manager II device the respective VMON trip point(s) need to be set to the 75mV setting.  The logic using the VMON is inverted in the LogiBuilder window of PAC-Designer. For example VMON2B is set for the 75mV trip point and the following step will wait until the Voltage is below 75mV:


Step 2 Wait for Not VMON2B