Complementary Pwm without timer
I'm working on a synchronous 3 phase dc to dc converter controlled by a pic. My issue is that I have 6 switches to run and there are not enough ccp modules on the 16F pic I had been using. However, I am hoping to use a 28 pin dip package for the pcb design due to ease of soldering and changing out of chips. The only pics offering enough pwm outputs, along with some other features I need, are 24F chips with far more pins and only in a surface mount package, adding lots of complexity, cost etc to the pcb.
I was thinking that since the two switches on each regulator will be operated in inverted mode, it may be possible to time the pwm for one switch using the ccp module and to simply operate another arbitrary output pin 180 degrees out of phase, with a certain dead time added of course, for the other switch (ie, the 'diode') using the appropriate special function register.
Would this be feasible?
Sorry this is so long!
Thanks very much,