I'm designing a project that would need a 5 volt DC supply. The supply voltage will be coming from an external AC DC adaptor. The voltage will go to the voltage regulator producing a 3.3Vdc output necessary to the circuit. According to some readings I made the Adaptors available in the market varried on thier quallity as some have very large ripple voltage at the output. In order to support large variations in the ripple voltage bulk capacitors might be required.
My problem is I dont know how to calculate the required values of the capacitors that would be necessary to the design assuming I wanted the device to work with the very low quality adaptor. Also in most designs I have noticed placing different values of the capacitors at the input. Is there a way to determine the correct values and number of capcitors at the input part of the circuit.
My problem is I dont know how to calculate the required values of the capacitors that would be necessary to the design assuming I wanted the device to work with the very low quality adaptor. Also in most designs I have noticed placing different values of the capacitors at the input. Is there a way to determine the correct values and number of capcitors at the input part of the circuit.