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Author Topic: Simple PWM Class d Amp 200w  (Read 7911 times)

Offline 01110011

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Re: Simple PWM Class d Amp 200w
« Reply #80 on: April 28, 2012, 09:07:47 AM »
sir 1SaGing5 diba nakagawa kana ng amp na to musta ang tunog , available po sa parts didto sa cebu tanx
wala oi
hehe walang mosfet dito ;D ;D
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Re: Simple PWM Class d Amp 200w
« Reply #80 on: April 28, 2012, 09:07:47 AM »

Offline kirk simone

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Re: Simple PWM Class d Amp 200w
« Reply #81 on: April 28, 2012, 12:14:13 PM »
wala oi
hehe walang mosfet dito ;D ;D
sis asa ani ang imo nahimo na amp hehehe
 gusto mag diy din nainggit ako hehehe
shake it .....

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Re: Simple PWM Class d Amp 200w
« Reply #81 on: April 28, 2012, 12:14:13 PM »

Offline 01110011

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Re: Simple PWM Class d Amp 200w
« Reply #82 on: April 28, 2012, 02:34:55 PM »
tda8920 lang yung D amp ko sis ;D
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Re: Simple PWM Class d Amp 200w
« Reply #82 on: April 28, 2012, 02:34:55 PM »

Offline chago25

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Re: Simple PWM Class d Amp 200w
« Reply #83 on: May 10, 2012, 09:47:07 AM »
Mga sis pwede po pahelp my sound na po sya kaso mas malakas ung sound na parang ung naghahanap k ng istasyon sa AM radio ano po kya cause nun?

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Re: Simple PWM Class d Amp 200w
« Reply #83 on: May 10, 2012, 09:47:07 AM »

Offline 01110011

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Re: Simple PWM Class d Amp 200w
« Reply #84 on: May 10, 2012, 09:50:51 AM »
^gawa ka ng bagong thread
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Re: Simple PWM Class d Amp 200w
« Reply #84 on: May 10, 2012, 09:50:51 AM »

Offline Disabled

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Re: Simple PWM Class d Amp 200w
« Reply #85 on: May 10, 2012, 09:58:18 AM »
Mga sis pwede po pahelp my sound na po sya kaso mas malakas ung sound na parang ung naghahanap k ng istasyon sa AM radio ano po kya cause nun?
apply proper grounding or may oscillation.

Offline abeTIR

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Re: Simple PWM Class d Amp 200w
« Reply #86 on: May 10, 2012, 11:40:46 AM »
Mga sis pwede po pahelp my sound na po sya kaso mas malakas ung sound na parang ung naghahanap k ng istasyon sa AM radio ano po kya cause nun?

ano yung amp built mo sis..

kung ang tinutukoy mo ay itong D amp ng thread...post mo yung pic ng inductor mo ano material ginamit mo...
"The choice is in the eye of the beholder and in the ear of the listener"
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Offline chago25

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Re: Simple PWM Class d Amp 200w
« Reply #87 on: May 11, 2012, 01:10:59 PM »
opo cge post kopo w8t ko lang cam ko ehe

Offline chago25

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Re: Simple PWM Class d Amp 200w
« Reply #88 on: May 22, 2012, 06:21:56 PM »
ask ko po pwede bang ipalit ung bd139/140 sa tip41/42 ?

Offline Disabled

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Re: Simple PWM Class d Amp 200w
« Reply #89 on: May 22, 2012, 06:23:16 PM »
^ no. mabagal yan.

Offline chago25

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Re: Simple PWM Class d Amp 200w
« Reply #90 on: May 22, 2012, 06:27:22 PM »
ah ok po salamat.. order nlang sa newport ehe

Offline abeTIR

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Re: Simple PWM Class d Amp 200w
« Reply #91 on: May 23, 2012, 07:55:46 AM »
ah ok po salamat.. order nlang sa newport ehe

sis, DO NOT do substitution of parts follow strictly kung ano yung parts na nakalagay it has to be that way. This Class D has to be precise. I did parts experimentation dati resulta SUNOG yung Mosfet... >:( ;D


Yung mga caps pala OK lang kahit hindi film or mica pero sa resistor at trannie values it's a NO! NO!

"The choice is in the eye of the beholder and in the ear of the listener"
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Offline chago25

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Re: Simple PWM Class d Amp 200w
« Reply #92 on: May 28, 2012, 08:52:01 AM »
ah ok po tnx po sa advice ginagawa n po ulit ung board ehe sana ok na ngayon

Offline j a y k e z

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Re: Simple PWM Class d Amp 200w
« Reply #93 on: May 28, 2012, 09:56:52 AM »
wow late ako d2 ah, subscribing ;D


Offline abeTIR

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Re: Simple PWM Class d Amp 200w
« Reply #94 on: May 28, 2012, 11:36:47 AM »




Ganito na pala ang build ko ngayon for ease of access sa heatsink ng Fets, this PCB mod is an attempt to lower the DC-offset yung output cap was directly tapped sa starground, medyo umepek naman ata' from 30.0mv (originally) down to 27.0mv... :D
"The choice is in the eye of the beholder and in the ear of the listener"
- The Method of DePalma

Offline j a y k e z

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Re: Simple PWM Class d Amp 200w
« Reply #95 on: May 28, 2012, 11:40:59 AM »
nice 1 sis +1 pala hehehe pati si TS ;D

kaya pala, iba pala ung PCB mo sis, nagtataka ako kc ung nakaPDF sa side ung torroid, ung sayo nasa gitna, inextend mo pala  :D

problema ko ung torroid (pwede ba ung sa PC PCU?) at ung mosfet baka wala available d2 sa amin

Offline jlester87

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Re: Simple PWM Class d Amp 200w
« Reply #96 on: May 28, 2012, 11:46:35 AM »
nice! matry nga to :) , madali lang i laser method yung layout...

Offline abeTIR

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Re: Simple PWM Class d Amp 200w
« Reply #97 on: May 28, 2012, 12:29:01 PM »
iba pala ung PCB mo sis, nagtataka ako kc ung nakaPDF sa side ung torroid, ung sayo nasa gitna, inextend mo pala  :D
problema ko ung torroid (pwede ba ung sa PC PCU?) at ung mosfet baka wala available d2 sa amin

maganda sana yung extended kaso mahirap maghanap ng heatsink na akma dapat solid aluminum medyo kakain nga lang ng PCB space kasi pahaba, yang latest na gawa ko flexible sa heatsink kahit ano size lapat diyan.

Toroid galing ng PC PSU puede naman mga ferrite core nga lang yan kelangan ng airgap puede rin yung EE ferrite core sa PC PSU, may airgap din. Check mo dun sa DIYAudio (Class D forum) kung pano gawin. Yun ang gamit nung ibang DIYers.
"The choice is in the eye of the beholder and in the ear of the listener"
- The Method of DePalma

Offline jlester87

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Re: Simple PWM Class d Amp 200w
« Reply #98 on: May 28, 2012, 12:48:43 PM »




Ganito na pala ang build ko ngayon for ease of access sa heatsink ng Fets, this PCB mod is an attempt to lower the DC-offset yung output cap was directly tapped sa starground, medyo umepek naman ata' from 30.0mv (originally) down to 27.0mv... :D

Tested na po ba sir? walang unusual heatups? thanks

Offline abeTIR

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Re: Simple PWM Class d Amp 200w
« Reply #99 on: May 28, 2012, 03:42:59 PM »
^yep sis, yung BDs (totem pole) kelangan ng heatsink puede DIY na kapirasong aluminum or bili sa Alexan meron dun na kasya para diyan. Normal na medyo mainit ang mga yan. Yung inductor medyo warm to touch din ang ideal neto ay dapat medyo cooler for normal use. I tried increasing the number of turns mas cooler siya but yung Fets naman ang abnormal ang init. Ideal inductance nito ay 22uh yan ang gamit ko.

"The choice is in the eye of the beholder and in the ear of the listener"
- The Method of DePalma

Philippine Electronics Forum

Re: Simple PWM Class d Amp 200w
« Reply #99 on: May 28, 2012, 03:42:59 PM »

 

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