Forum Post: LM5088 use for Vin=10~14V Vout= -50V 0.5A

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Dear Sir

Our request is  VinMin = 10.0V  VinMax = 12.0V  Vout = -50.0V  Iout = 0.5A

We use WEBENCH to simulate schematic, WEBENCH suggest to use LM5088, the report in the attached file.

We reference the report and implement the LM5088MH-1 circuit, but the output voltage is -18V(negative voltage) only, and the LM5088 chip is overheat.

We check the lm5088's datasheet, in the pin description table, the EN pin voltage is above 1.2V the controller will be operational.

But in the WEBENCH Design Report, the EN pin voltage is negative voltage.

Can someone help us to solve the problem? If you have others recommend , please help to suggest to me, Thanks