I am looking at the circuit shown in the page 6 - Document

The circuit is as shown - Circuit

The IC (PWM controller) used is the UCC289. The Vcc/Vdd (supply) is a max of 16V approx as per the datasheet. But, here we are feeding it almost 36-72V. How is that even possible ? The supply(36V) is fed via J1 and then finally to P_Bias.


1 Answer 1


I don't know where did you find a 16V, but from the datasheet Table 1 we have the characteristics of the PWM controller: enter image description here

It seems to be OK for me!


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