JAJU459B December 2017 – November 2022
The ready (RDY) pin indicates the status of the UVLO internal protection feature for the input and output sides. If either side of the device has an insufficient supply (VCC1 or VCC2), the RDY pin output goes low; otherwise, the RDY pin output is high.
In addition to the RDY pin, the UCC21750 features an isolated analog to PWM signal function from AIN to APWM pin, which allows additional system monitoring for example isolated temperature sensing, high voltage dc bus voltage sensing, and so forth.