Piccolo ePWM compare trip with deadtime

Janko Horvat

Is it possible to setup the PWM module of the f2803x to generate a complemetary PWM with dead time even when the comparator trips the PWM? When I set that the comparator signal forces (cycle by cycle) PWMxB to Low and the complementary PWMxA to High there is no dead time in between the signals.

over 14 years ago

0 andreas von kaenel over 14 years ago

Genius 4925 points

Hi Janko,

This is not possible - Have a look to the PWM overview (figure 3 in spruge9d.pdf )There you can see, that the tripzone submodule is the last in the pwm signal chain and thus overwrites the deadband settings.

Best regards

Andreas

0 Janko Horvat over 14 years ago in reply to andreas von kaenel

Prodigy 20 points

Thanks! I saw it but i hoped that there is a trick how to do it.

0 MC64936 over 14 years ago in reply to Janko Horvat

Prodigy 30 points

Even though the devices are full of very advanced features it is never enough for some application somewhere,

we all need tricks one way or another, don't we? :-(

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Piccolo ePWM compare trip with deadtime