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soft-start circuit of UC2845A

Other Parts Discussed in Thread: UC2845A, UCC38C42

We have questions about UC2845A.

We try to design the soft-start circuit by using this application note p.14 figure.12 about UC2845A.

This application note is published in web page of UC2845A.

http://www.ti.com/lit/an/slua257/slua257.pdf

Please tell us the formula to set the value of external parts(resistor, capacitor and so on) in soft-start circuit.

Is there a limit to soft-start time?

Best regards,

Takahiro Nishizawa