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Shifted PWM generation

Question asked by grossi.marco on May 29, 2017

I need to generate two PWM signals (frequency 6.78MHz, duty cycle 50%) to drive an inverter that must be shifted by an amount programmable on-line by the user (the chip will be interfaced with a microcontroller and must be programmed on-line).

The PWM shift resolution (minimum shift between the two signals) must be at least 18-20 steps between 0° (signals in phase) and 180° (signals in opposite phase).

I need to find an IC suitable for this application. On the web I found the STNRGxxxA (STNRG288A, STNRG328A, STNRG388A). However I am not sure if these components meet my requirements (maximum switching frequency, maximum PWM shift resolution) or some other IC more suitable for the task exists.


Thanks for your support.

Best regards.