DC-DC converters

[nashkato]

anybody got some info , reading material on dc-dc converters ?
i‘m thinking basic stuff , how do they work , whats a common fault ?

 

[L´Andratté]

Those got me started. Usual suspects.
https://sound-au.com/project192.htm
https://sound-au.com/project193.htm

 

[Khron]

https://sound-au.com/articles/smps-primer.html

Common faults? Depends on the design. Off-line (ie. mains-powered ones) ones can often have a dried-out "startup cap", a 10-47uF electrolytic on the controller chip's supply rail. Most small-to-medium power off-line supplies will be a flyback design.

 

[abbey road d enfer]

Go there:
https://en.wikipedia.org/wiki/Buck%E2%80%93boost_converter
At the end of the page, there are links to other topologies.

 

[nashkato]

great , thanks !
the sound-au smps overview will get me started .
yes , it is a flyback design .

 

[Khron]

Startup cap, secondary side caps, blown MOSFET, most times taking the controller down with it; less frequently, rectifier diodes conked out.

Big Clive put out a handy video just the other week, about some high-voltage-input power supplies (meant for 3-phase mains). Same standard flyback design, though.

https://youtu.be/hIS8eT6NhQ8