Tool/software:
Scheme - PMP11237. UCC29950DR CCM PFC and LLC Combo Controller. AC source voltage between 90 VAC and 264 VAC. VCC = 5V. Tell me what did I do wrong? Why isn't there 12 volts?
Hi, there is a "MD_SEL/PS_ON" pin. Depends on the voltage level on that pin, the device will decide which mode to enter (Aux Bias Mode or Self Bias Mode). Maybe you didn't select a proper operation mode?