Hi all,
I was trying to build a programmable power source using the opa548. (which has to drive a dc/dc module) But when i connect a capacitor of 1uF capacitor parallel to ground during power up, the circuit is not able to drive the load, but when i dont use the capacitor it seems to work pretty fine. The dc/dc module is being driven by the op-amp using a long wire and hence the parasitic inductance of the wire is also coming into picture, so the circuit seems to be stable. But that wont be the case if i make a pcb design for the same circuit. can you guys help me with the design of the compensation circuit for the same (as the input of the dc/dc module may have a capacitance of greater than 100n). i need the op-amp to be driving atleast .5uF capacitance to the ground. i have also attached the circuit that i have built.
Tests done:
when capacitor(1uF) is solder short, source is getting loaded.
when capacitor(1uF) is connected to th
e wire, source doesnt get short.
