Switchmode power supply - Electronic Circuits Projects Diagrams Free

johneppen · 17th March 2003, 07:16 PM

How do switchmode power supplies work? Is the 110v from the wall rectified to dc, then back to a high frequency ac? Then with the high frequency ac is it sent through a small transformer and stepped down to the needed level?

john1 · 17th March 2003, 07:56 PM

Hi johneppen,

There is a good description of the workings of SMTPs here,
Power Supply Fundamentals
on this page:
http://www.repairfaq.org/sam/smpsfaq.htm#smpspsf
Seems quite similar to how you describe in your post.

Regards, John

**kinjalgp** · 18th March 2003, 09:00 AM

Quote:

There is a good description of the workings of SMTPs here

Its SMPS

Seems you are doing lot of networking these days.

bogdanfirst · 18th March 2003, 09:10 AM

talking about a SMPS....i got a swichng power suply....it is from AC to DC, but it had a rectifier bridge and a filtering capacitor....
can i remove the bridge and feed directly CC?

Thread Tools
Show Printable Version Email this Page
Display Modes
Linear Mode Switch to Hybrid Mode Switch to Threaded Mode

17th March 2003, 07:16 PM	(permalink)
johneppen	Switchmode power supply How do switchmode power supplies work? Is the 110v from the wall rectified to dc, then back to a high frequency ac? Then with the high frequency ac is it sent through a small transformer and stepped down to the needed level?

17th March 2003, 07:56 PM	(permalink)
john1	Hi johneppen, There is a good description of the workings of SMTPs here, Power Supply Fundamentals on this page: http://www.repairfaq.org/sam/smpsfaq.htm#smpspsf Seems quite similar to how you describe in your post. Regards, John

18th March 2003, 09:10 AM	(permalink)
bogdanfirst	talking about a SMPS....i got a swichng power suply....it is from AC to DC, but it had a rectifier bridge and a filtering capacitor.... can i remove the bridge and feed directly CC?