Part Number: LM5023
Hi,
We have two separate LM5023 based flyback bias circuits in our design. At standby, we want to turn off one bias circuit to reduce overall standby power.
To accomplish this, we were planning to pull down the COMP and VSD pins of the LM5023 on the bias we want turned off. We plan on using an opto which will be driven from a secondary micro that will be active during standby. I have attached a simplified schematic. Pulling the COMP pin down to primary GND prevents PWM pulses to the power train and pulling the VSD pin down prevents depletion mode FET turn on to charge the VCC cap.
Just wanted to check if there are any concerns using this method or is there any other more effective method to turn the bias off and reduce standby power further.
Thanks for your help.
