FULL BRIDGE SMPS

CHACALPOWERS · 13th January 2012, 03:58 PM

Hello guys, are you fine?

This my new SMPS, now only in PROTEUS designing (top side).

In future posts I'll show you down side and, maybe, the SMPS finished pics.

Regards.

Sandro

Osvaldo de Banfield · 13th January 2012, 04:44 PM

Which kind of full bridge are you using: classical, quasi resonant, phase shift?

CHACALPOWERS · 16th January 2012, 12:52 AM

Quote:

Originally Posted by Osvaldo de Banfield

Which kind of full bridge are you using: classical, quasi resonant, phase shift?

Hello Mr. Osvaldo, how are you?

It ' s a FB classical design, like a many others in the Web.

Thank you by comments.

Sandro

stewin · 17th January 2012, 09:13 AM

the schematics ?

Osvaldo de Banfield · 17th January 2012, 10:59 AM

I can´t understand the "FB" acronym in your post, if you mean it Flay Back, then can´t be Half Bridge, this is a two transistor Fly Back and/or active clamp. To my acknowledgement there isn´t Fly Back Half Bridge topology....

CHACALPOWERS · 17th January 2012, 11:22 AM

Quote:

Originally Posted by Osvaldo de Banfield

I can´t understand the "FB" acronym in your post, if you mean it Flay Back, then can´t be Half Bridge, this is a two transistor Fly Back and/or active clamp. To my acknowledgement there isn´t Fly Back Half Bridge topology....

It's writed "FULL BRIDGE" in the post title... If,... F= full, B=bridge.
You ask what kind FULL BRIDGE? My answer for you it's a CLASSICAL FULL BRIDGE . I don 't build Fly Back SMPS.

REgards.

Osvaldo de Banfield · 17th January 2012, 11:24 AM

OK.

gmarsh · 17th January 2012, 11:30 AM

Lets see...

- SG3525 controller, which has alternating outputs
- two IR2110s next to four IRFP460s
- Four output rectifiers, presumably acting as a full wave rectifier for positive/negative outputs.

I'd call that a conventional full bridge supply.

However... I see toroid transformer as the only magnetic on the supply. And I assume this isn't a "99% duty cycle" supply that depends on leakage inductance, because of the optocoupler that's present... this is all conjecture from a parts placement, but yeah, mind posting a schematic?

CHACALPOWERS · 17th January 2012, 03:39 PM

Quote:

Originally Posted by gmarsh

Lets see...

- SG3525 controller, which has alternating outputs
- two IR2110s next to four IRFP460s
- Four output rectifiers, presumably acting as a full wave rectifier for positive/negative outputs.

I'd call that a conventional full bridge supply.

However... I see toroid transformer as the only magnetic on the supply. And I assume this isn't a "99% duty cycle" supply that depends on leakage inductance, because of the optocoupler that's present... this is all conjecture from a parts placement, but yeah, mind posting a schematic?

Hello Mr.

I 'll post schematics but this SMPS is based in others SMPS schematics finded here and in the web, ok?

The Sg3525 output (pin 11) is connected to first IR2110 (pin 10) and second IR2110 (pin 12) and another output of SG3525(pin 14) is connected to first IR2110 (pin 12) and second IR2110 (pin 12).

So, when #1 and #4 IRFP460 are ON state, the #2 and #3 IRFP460 are OFF state.

Yes, 99% duty cycle.

Diode Schotkies are 2 + 2 because there is CENTER TAP in the core.

The optocoupler read output voltage for regulated output.

Thank by your comments.

Excuse me my bad/ugly english.

Sandro

gmarsh · 17th January 2012, 04:30 PM

99% duty cycle means unregulated... and you're regulating the output?

17th January 2012, 10:59 AM	#5
Osvaldo de Banfield diyAudio Member Join Date: Dec 2011 Location: Barrio Garay,Almirante Brown, Buenos Aires, Argentina	I can´t understand the "FB" acronym in your post, if you mean it Flay Back, then can´t be Half Bridge, this is a two transistor Fly Back and/or active clamp. To my acknowledgement there isn´t Fly Back Half Bridge topology.... __________________ A veces pongo un circo y me crecen los enanos... "Que se llama soledad", Joaquin Sabina, el capo.

17th January 2012, 11:24 AM	#7
Osvaldo de Banfield diyAudio Member Join Date: Dec 2011 Location: Barrio Garay,Almirante Brown, Buenos Aires, Argentina	OK. __________________ A veces pongo un circo y me crecen los enanos... "Que se llama soledad", Joaquin Sabina, el capo.

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13th January 2012, 04:44 PM	#2
Osvaldo de Banfield diyAudio Member Join Date: Dec 2011 Location: Barrio Garay,Almirante Brown, Buenos Aires, Argentina	Which kind of full bridge are you using: classical, quasi resonant, phase shift? __________________ A veces pongo un circo y me crecen los enanos... "Que se llama soledad", Joaquin Sabina, el capo.

17th January 2012, 09:13 AM	#4
stewin diyAudio Member Join Date: Jul 2007	the schematics ?

17th January 2012, 11:30 AM	#8
gmarsh diyAudio Member Join Date: Apr 2004 Location: Halifax, NS, Canada	Lets see... - SG3525 controller, which has alternating outputs - two IR2110s next to four IRFP460s - Four output rectifiers, presumably acting as a full wave rectifier for positive/negative outputs. I'd call that a conventional full bridge supply. However... I see toroid transformer as the only magnetic on the supply. And I assume this isn't a "99% duty cycle" supply that depends on leakage inductance, because of the optocoupler that's present... this is all conjecture from a parts placement, but yeah, mind posting a schematic?

17th January 2012, 04:30 PM	#10
gmarsh diyAudio Member Join Date: Apr 2004 Location: Halifax, NS, Canada	99% duty cycle means unregulated... and you're regulating the output?

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