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UCC28C44: Low limit value of Vf (two diodes) at comp pin.

Part Number: UCC28C44

Tool/software:

Hi, TI.

Could you give me information about low limit value of Vf (two diodes) at comp pin?

The comp pin is connected to the emitter of a pnp transistor, the base of the pnp transistor is connected to the collector of another npn transistor, and the emitter is connected to GND.
In the above case, I want to confirm that the duty cycle is definitely zero.

If it is difficult to provide a guaranteed value, please provide it as reference information.250718_TI.pdf

Best, regards,