Switch mode power supply

jefro June 12, 2010 at 14:58:59

Vary voltage on input while monitoring output. It should remain constant across specified voltages. I support the 'Everybody Draw Mohammed Day'. A religion doesn't deny my freedom.

thanks for ur help sir,but i need it in a experimental way.(i.e) i must specify all the apparatus required to test it and and also i must give a digramatic explanation of procedure and draw a sketch of the output waveform.if u could help me out it would be fine

LMiller7 June 12, 2010 at 22:01:53

Computer technicians do not test power supplies at that level. They check output voltages or replace the power supply with a known good unit. Interpreting waveforms requires training in electronics and practical experience. The knowledge to do this cannot be obtained by asking questions on a forum.

wizard-fred June 14, 2010 at 00:50:27

It depends on the kind of power supply. Power factor correcting will have a different input waveform. The load also affects the waveforms. For operating characteristics see the data sheets of the various chips.

clive_pearce June 14, 2010 at 01:14:30

GOOGLE http://www.repairfaq.org/sam/smpsfa...

LMiller7 June 14, 2010 at 06:12:46

There are no easy answers to the testing and troubleshooting of a SMPS. This requires knowledge of electronics and practical experience. It is not simply a matter of comparing waveforms. These will vary with input voltage, load, and the make and model of the power supply. Interpreting waveforms is a skill and often requires making intelligent guesses.