Can please some one help me with this circuit the input voltage is dc voltage and vary from 25vdc to 200 vdc and the output should be 120vdc(fixed) i use tiny 380 for switching and tl431 as a reference it is very low power less than 20 w OUT PUT VOLTAGE IS ACROSS C2 I TRY IT BUT THE VOLTAGE DOES NOT STOP IT GO TO MORE THAN 400 VDC SO HOW CAN I REGULATE THE OUT PUT AND MAKE IT 120 VDC
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