LM3406

I will have somebody take a look at the data when they have the time and get a min/max. However, although they should be reliable numbers given the amount of guardbanding we use they will NOT be guaranteed numbers and they will not be in the datasheet. But I will let you know when I have them.

Hello. If we were to provide limits for toff-min they would be 130ns minimum and 380ns maximum. Please remember these are not in the test program so they cannot be guaranteed. But those numbers should be pretty safe.

Hello, my driver should provide 200mA current at 47V maximum output comply voltage. What is the minimum input voltage should be applied to?

That depends on what switching frequency you design for. The maximum duty cycle would be (tperiod-toffmin)/tperiod where tperiod is a full cycle for the frequency you choose. So Vin(min) would be Vout(total)/Dmax where Vout(total) is the max output voltage plus the current sense voltage and Dmax is the maximum duty cycle described. There are some losses so it's good to give yourself 2V or so of headroom above this ideal value.