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LT1248 : Issue while AC DC conversion

Hello All,

I am making an AC DC converter and for PFC I am using LT1248. But when I provided Vcc (16VDC) to the circuit, I am seeing 0V at Vref pin, but as per datasheet, it should be 7.5VDC. Due to this issue, I am suspecting that IC is not getting turned ON, Please help me to understand the issue here.



P.S.: I have used the same circuit, which is suggested by LT in the datasheet, below provided the image for reference.

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