Tagged Questions

3
votes
1answer
213 views

output filters for power supply design

I am trying to develop a design for a power supply design. At the output of my design is a diode rectifier with capacitive filter output. I've been told that I should expect to see an ESR zero or ...
4
votes
1answer
315 views

Inductive choke with bypass capacitors?

I've been looking at a few power input circuits and quite a few of them suggest an inductive choke with a large bypass capacitor followed by smaller bypass capacitors. In theory this is what I ...
4
votes
2answers
2k views

EMI Filter calculation in a SMPS

I am building a SMPS using the fairchild Semi FSGM300N Power switch. FSGM300N Datasheet If that datasheet link is walking wounded try FSGM 300N datasheet I used the design tools provided by fairchild ...
36
votes
5answers
5k views

My linear voltage regulator is overheating very fast

I'm using a 5V/2A voltage regulator (L78S05) without a heatsink. I'm testing the circuit with a microcontroller (PIC18FXXXX), a few LEDs and a 1mA piezzo buzzer. The input voltage is ~24V DC. After ...
5
votes
2answers
820 views

Shall I use a choke or a bead to filter analog power supply?

Often I have a 3.3V or 5V mixed-signal circuit with a microcontroller running in the 10 MHz range and some analog circuitry, e.g. audio or analog sensor signals, powered from a wall-wart style supply ...
2
votes
2answers
2k views

Mains Hum Filter

Are there any chips or simple circuits available for removing the 50/60Hz mains hum from a regular power supply unit? So I've got a few bits of audio equipment that have bad PSUs and they have a bit ...