I am using a linear Technologies power supply chip 8616. I have used LTpowe rcad and ltspice to try to get a handle on the closed-loop response of this power supply. I don't think I believe the LT powercad results for the clos ed-loop performance. How would you conduct a real experiment with the real power supply chip to ascertain the closed-loop performance? What I am doing is injecting a second current Source into the load resistor and trying to see how quickly the power supply output voltage can respond to the current low changes at the output. It allows the power supply to change current req uirements both with a square wave and sine waves from say .5 amps to 1 and
1/4 amps. I get nice results with feedback capacitor values that LT power c ad shows is practically unstable- posted
7 years ago