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Author Topic: smps power supply for amplifiers  (Read 4433 times)

Offline rdpzycho

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Re: smps power supply for amplifiers
« Reply #20 on: December 22, 2009, 11:43:55 AM »
kailangan kasi sir sobrang taas ng switching frequency para makuha ng maayos 'yung upper bands. pero para sa general/social/casual use, ok na sila sa akin. ;D ;D ;D

sa active crossover siguro pwedeng Class D 'yung lower bands, tapos linear 'yung upper, medyo mababa na rin naman ang power requirement kung pure upper band lang. ;D
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Re: smps power supply for amplifiers
« Reply #20 on: December 22, 2009, 11:43:55 AM »

Offline danny

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Re: smps power supply for amplifiers
« Reply #21 on: December 22, 2009, 12:01:03 PM »
ako rin sir rd pwede na sa akin ung ganun
im sure sa ordinary listener its more than enough

ang karamihan gumagawa ng class D is bang and olufsen
tapos binebents sa ibang manufacturers.

yung iba naman ay joint project like pioneer
bale may mga joint project sila ng B&O
alam ko rotel is same din :)
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Re: smps power supply for amplifiers
« Reply #21 on: December 22, 2009, 12:01:03 PM »

Offline kulit06

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Re: smps power supply for amplifiers
« Reply #22 on: December 22, 2009, 12:31:33 PM »
yung cold amps ay class d diba?ok daw yun pang subwoofer,yung kasama ko gumawa ng powered sub yun ang gamit,tapos prism audio naman gamit nya pang mid-high,sa rs nya ata nabili yung prism audio.mahal ang mga yun kaya gumawa na lang ako ng lm3886 para sa mid-high tapos p68 ni rod elliot para sa sub.kulang sa budget eh.smps gamit ko sa lm3886,toroid na 46-0-46 800VA naman para sa p68.ok na siguro yun for 4.1 system hehehehe ;D

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Re: smps power supply for amplifiers
« Reply #22 on: December 22, 2009, 12:31:33 PM »

Offline namzer0

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Re: smps power supply for amplifiers
« Reply #23 on: August 25, 2010, 09:28:17 AM »
bipolar SMPS supply? pwede ba yun sa xformer ng SMPS?
forward flyback or bridged?

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Re: smps power supply for amplifiers
« Reply #23 on: August 25, 2010, 09:28:17 AM »

Offline aswang

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Re: smps transformer
« Reply #24 on: August 27, 2010, 06:46:14 AM »
sa mga master tanong lang paano malalaman kung sira ang smps transformer yung mayron primary at secondary makikita kaya pag resistance check. salamat mga master.

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Re: smps transformer
« Reply #24 on: August 27, 2010, 06:46:14 AM »

Offline rdpzycho

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Re: smps power supply for amplifiers
« Reply #25 on: August 27, 2010, 08:36:21 AM »
^ 220V ba? kung open makikita. pero kung may nag-short lang, madalas physical inspection ang ginagawa dahil masyadong mababa ang resistance ng windings niyan (milliohms to few ohms sa karamihan ng design) dahil mas konti nga ang windings nito compared sa ordinaryong transformer. noong nasa design pa ako ng SMPS, mas chine-check ko 'yung inductance bago physical inspection.

bipolar SMPS supply? pwede ba yun sa xformer ng SMPS?
forward flyback or bridged?

yup pwede naman. multiple windings, katulad nung gamit sa PSU ng PC.
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Offline aswang

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Re: smps power supply for amplifiers
« Reply #26 on: August 27, 2010, 08:55:18 AM »
master pag nag check inductance, gagamit ka ba ka gaya ng tester. or especial  na gamit?

Offline rdpzycho

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Re: smps power supply for amplifiers
« Reply #27 on: August 27, 2010, 08:59:54 AM »
may inductance meter sa opisina, 'yun ang ginagamit ko. pero merong mga post dito na design ng DIY meter, 'di ko lang maalala kung may inductance. ;) BTW, kailangan merong reference na buong transformer kung saan iche-check 'yung inductance. kung 'yung rine-repair lang din kasi ang hawak, 'di rin masasabi kung may problem 'yung transformer by inductance.
‎"Divide each difficulty into as many parts as is feasible and necessary to resolve it."
- Rene Descartes

"For every difficult problem there is always a simple answer and most of them are wrong."
- Clayton Paul

Offline aswang

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Re: smps power supply for amplifiers
« Reply #28 on: August 27, 2010, 09:19:35 AM »
master sa experience mo, madalas ba ito na sisira? pag ito ang sira ano ang usual na problema. master pasensya na makulit lang ako!  :) gusto ko lang matutu.

Offline rdpzycho

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Re: smps power supply for amplifiers
« Reply #29 on: August 27, 2010, 09:25:37 AM »
^ nagre-repair din kasi ng mga telco rectifier sa opisina, sa laht siguro ng mga nare-repair, mga 1 in 50 repairs lang ang nasisiraan ng transformer at obvious na makikita kung sira 'yung transformer. ;)
‎"Divide each difficulty into as many parts as is feasible and necessary to resolve it."
- Rene Descartes

"For every difficult problem there is always a simple answer and most of them are wrong."
- Clayton Paul

Offline aswang

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Re: smps power supply for amplifiers
« Reply #30 on: August 27, 2010, 10:34:30 AM »
salamat master :(

Offline johnnylee

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Re: smps power supply for amplifiers
« Reply #31 on: April 19, 2011, 11:37:18 AM »
basa mode

Offline kirk simone

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Re: smps power supply for amplifiers
« Reply #32 on: May 13, 2011, 11:40:39 PM »
 :) :) :) may narinig nga ako heheee
shake it .....

Offline ♪ ♫ ♫ ♪ ♪ ♪ ♫ ♫ ♫

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Re: smps power supply for amplifiers
« Reply #33 on: November 17, 2011, 01:31:28 PM »
up ko lang baka domoble ang thread  ;D

@ sir Dan..



pwede post kayo kahit isang schematic lang ng smps na gamit sa amps na maintained nyo? kahit isa lang para basihan lang ng desenyo  :)

(pwede pati specs nito as per amps kung saan ito ikinabit)

kung di pwede post sa pm nalang   ;D
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Offline Pinoy_Tech

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Re: smps power supply for amplifiers
« Reply #34 on: November 25, 2011, 03:28:40 PM »
Sis, parang meron akong schematic na pang ampl pero nasa baol sa pinas pa sana
maalala ko pag uwi para ma scan. Balak ko ring may diy gamit ang yoke ng tv.

Offline Tukkar

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Re: smps power supply for amplifiers
« Reply #35 on: January 05, 2012, 10:57:00 AM »
I had used 2pcs 24.5 volts 10a SMPS in series for my class a amp....when connecting in series be sure to isolate grounding of AC Input or the DC output...else boom...

In class A SE mode i heard a HF noise on the amp but when i added LC filter, snubber and 0.1 uf mylar caps on the supply output, it greatly reduced but not totally eliminated. when tried with class ab amps...perfect no more hissing or hum...

on Some SMPS that I've tried specially those with external trigerring voltage (5Volts), the output voltage greatly drop at maximum load specs,so be sure that you provide enough trigger current.
Pag gusto maraming paraan, pag ayaw maraming dahilan!!!!...

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Re: smps power supply for amplifiers
« Reply #36 on: January 12, 2012, 04:35:30 PM »
ganun  ba sir danny?pansin ko kasi may detailed yung tunog tsaka mas maganda ang bass nung amp pag smps gamit ko eh. ;D

regulated kasi yang smps kaya kuha lahat ang bass input wave, di kagaya ng x-f na hindi ito regulated, pwedeng mag dip yong voltage sa peak during deep bass.

pwede itong tapatan ng x-f na para naring regulated na supply pero nasa x4 yata dapat yong rating ng x-f sa rating ng amp, using conventional computation sa paggawa ng x-f.
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Offline bravokilo

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Re: smps power supply for amplifiers
« Reply #37 on: January 27, 2012, 10:54:06 AM »
Kulit06 sister, saan mo nakuha yan SMPS na 35V, 7 A. Ok yan ah. Saan mabili? Yung mga pagkaraniwa kasi 12V lang altho pwede rin e series to get 24 or 36. Pero dadami like anim(6) to get 36V + and -.

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Re: smps power supply for amplifiers
« Reply #37 on: January 27, 2012, 10:54:06 AM »

 

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