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Hi,

I need to introduce a dead time between two complementart PWM pulse, trying to turn on the high and low side of a half h-bridge using the ouput an inverted output of LTC1714 hi-speed comparator. The PWM pulses are acting great just need to have something to inject the dead time between the VOUT and VOUT! of the pulses which will then be sent to the input drive pins of the half bridge drivers.

Thanks,
Anirban.

Hi Anirban

I needed to do this with a class D audio amp
to actually get overlap for continuous conduction,
needed to eliminate cross over distortion.
(separate inductors for each fet)

If youre using the comparator with a ramp or triangle signal,
use a 2nd comparator with a slightly offset comparison voltage.
The delay of one crossing to the 2nd gives a very reliable dead time.
Other wise, use a one shot w/ some logic to get the delay.

Al D.

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