Making car amplifier SMPS with tl494 + DC Protection
 

Hello to every body.
I have made plenty car amplifiers + smps based on sg3525.I have read all this forums and any body have full schematic for making smps with tl494 + DC protection for loudspeaker than temperatur protection etc.:confused:

Here some pictures of my car amplifier + smps 1x100w.If there interesting I will put thr pcb on this site.The smps give +/-30V 5A.

Looks pretty neat, i'd be interested in the SMPS pcb, been playing around with designs for a few months, one day i'll actually make one :)

Re: Making car amplifier SMPS with tl494 + DC Protection
 

Very nice work. I'd be interested in seeing the schematic too. BTW, what is the switching frequency?

speaker

OK
 

Ok I will put schematic in .pdf format of .jpg or in Protel99SE format.

Now I am not home but tonight I will put the pcb and schematic of SMPS.

sorry for my bad english

HERE IT IS THE SMPS
 

Just download thr .zip file and there you will find pcb,schematic and lot of pictures of smps.The pictures have low quality becous it was pictured with Sonyericsson T610 phone.

Please now tell me what do you thing about my design.

THE BCB TOP
 

HERE IT IS THE TOP LAYER OF smps PCB

hERE IT IS pcb BOTTOM LAYER
 

hERE IT IS pcb BOTTOM LAYER

AND PICTURES
 

AND PICTURES OF SMPS

Amplifier 1x100W - PCB
 

Ok that it. If you have any questions about making feritte toroid and basic calculating just ask.Here is the final part the car amplifier pcb zip file

Re: Amplifier 1x100W - PCB
 

Hi .

Well i have couple of questions about smps.

1) How many turns have u used for prim. and sec ?
2) Did you tryed to remove 4n35 and force duty cycle to 50% and then measure output voltage ?

I ask this because I have maded similar smps primary->4x4, secondary 11x11 . When I remove 4n35 and force sg3525 to duty 50% I got 60x60 volts .

Greetings