in the past ive made DC-DC converters using the AVRs ADC and PWM, where they are connected directly to the Buck-Boost converter, and regulate from there. However, the problem is that the transient response was too slow, and the PWM frequency is too small, resulting in large converter components.
Is there some sort of dedicated DC-DC controller IC that we can connect directly to an AVR, which will handle the regulation??
The task: i want to make a high current variable power supply. So the chip needs to be able to accept some type of signal from the AVR, and regulate around that.
Also, ive looked at analog solutions such as a tl494, but im not really sure how i can connect it to an avr. One thought was, maybe i can use a digital potentiometer connected to the feedback loop of the 494, and then connect it on the i2c interface of the AVR. ant thoughts??