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Old 18th November 2004, 02:18 AM   #1
thanh is offline thanh  Viet Nam
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Default switching power supply :simple,high efficiency .Please help

Can any give me some schematic?thanks you
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Old 18th November 2004, 02:29 AM   #2
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I'm working on something slightly more complicated than:

Click the image to open in full size.

But I work very little on it.

Tim
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Old 19th November 2004, 03:24 PM   #3
thanh is offline thanh  Viet Nam
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oh!thank you .but i have no tube
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Old 19th November 2004, 05:48 PM   #4
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I was just using that for convienience, you can use a high speed diode instead.

The oscillator as shown doesn't always start, or keep running, FWIW.

Tim
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Old 19th November 2004, 11:19 PM   #5
sss is offline sss  Israel
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Default Re: switching power supply :simple,high efficiency .Please help

Quote:
Originally posted by thanh
Can any give me some schematic?thanks you
hi
if u looking for somthing dealing with audio try the next car amp power supply
http://sound.westhost.com/project89.htm
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Old 23rd November 2004, 08:45 AM   #6
thanh is offline thanh  Viet Nam
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Quote:
if u looking for somthing dealing with audio
yes! thank you! I think i can't buy sg ic
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Old 25th November 2004, 04:04 PM   #7
sss is offline sss  Israel
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try uc3825 - they are better , made by TI (www.ti.com)
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Old 25th November 2004, 04:22 PM   #8
djQUAN is offline djQUAN  Philippines
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what type of SMPS are you thinking of?
for car amp? car preamp? offline?

if you need the first two, I got one in here... http://djquan.angelcities.com/smps.html

uses cheap and readily available TL494.
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Old 26th November 2004, 03:40 AM   #9
thanh is offline thanh  Viet Nam
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thank djQuan, sss and sch3mat1c
I need a switching pw sppl +-35v 8A and more
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Old 27th November 2004, 06:23 PM   #10
sss is offline sss  Israel
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the most difficult part is the transformer , choosing the core ,turns .......
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