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Originally Posted by Ether
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So, looking at figure 4-4, is this interpretation correct? The basic "OFF" state is q2g and q4g high. To go forward, q1g goes high, then after a little q2g goes low. Back off, q2g high, then q1g low. Reverse, q3g high, then q4g low. Back off again, q4g high, then q3g low. At each "then" is a small delay.
Then what are those zener diodes for (assuming I'm identifying them correctly)? Just in case there's a switching delay that isn't supposed to happen the MOSFETs don't get fried?
And then I can infer there's an oscillator that drives a clock for the whole thing? And the PWM signal is somehow fed into this oscillator that changes the frequency (and forward/reverse)?
Am I understanding this correctly? At this point, it's just theoretical (clearly that's above my skill level), but it's still interesting to understand how all of those "black boxes" work.
EDIT: @techhelpbb - thanks for the link! The links earlier up in the topic were very helpful - I think they give me enough information to make an informed decision.