| Re: Thanks- question about D1 current [message #11283 is a reply to message #11282] |
Mon, 30 January 2006 06:43  |
Damir
Messages: 1005
Registered: May 2009
|
Illuminati (2nd Degree) |
|
|
Basically, C-input PS has a disadvantage that charging current "on the capacitor" is in the form of sharp peaks, with peak value many times the load current. This current flows through D1 & T1, you can see it graphically if you look on the little time segment, for example see the link. Choke input filter has much better "behaviour", it "draws" more or less constant current.
Our example (small, 1,5µF cap input) is something in between, "almost" L-input, with small charging current peaks.
To be on the safe side, and have some "room" for experiments - use the 275-0-275V PT with 160mArms current capacity. For "pure" L-input Itr~Iload.
|
|
|
|
Posting Rules
Members
Search
Help
Register
Login
Get a T-Shirt!
