rdpzycho
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« on: March 22, 2008, 06:20:26 PM » |
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I would just like to share the Universal Class D made by Bruno Putzeys...he was a former engineer at Philips who made the Universal Class D concept (a Class D made up of Discrete components and no ICs)...for those interested pwede niyong i-try ito...they are even good enough to include schematics (NXP and Hypex who now licenses the UcD)... here's the link... http://www.hypex.nl/docs/UcDBP.pdf |
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"Keep on starting, and finishing will take care of itself."
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« on: March 22, 2008, 06:20:26 PM » |
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Ate Shey
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« Reply #1 on: March 22, 2008, 06:52:38 PM » |
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wow Class-D amp  |
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RaffT
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« Reply #2 on: May 09, 2008, 10:30:58 AM » |
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I would just like to share the Universal Class D made by Bruno Putzeys...he was a former engineer at Philips who made the Universal Class D concept (a Class D made up of Discrete components and no ICs)...for those interested pwede niyong i-try ito...they are even good enough to include schematics (NXP and Hypex who now licenses the UcD)... here's the link... http://www.hypex.nl/docs/UcDBP.pdfYeah it works.. pero yung schema na naka attach sa PDF is too simple..and no actual part value... |
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Learning is CooL! BEAM robotics/DIY UCD180/PSP/AC wtmtr/digiESRmtr/PICkit™2 clone/SGTC/SSTC/DR-SSTC
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danny
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« Reply #3 on: May 09, 2008, 10:47:47 AM » |
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thanks for posting |
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danny
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'yus
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« Reply #4 on: May 09, 2008, 10:52:46 AM » |
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join PhilRobotics - Amateur Robotics Club of the Philippines |
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RaffT
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« Reply #5 on: May 09, 2008, 11:05:49 AM » |
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yup! exactly... but its an oscillator also(and a hi-power at that) ucd 380Khz(more /less) it needs an output LC filter(@ output) to filter out the -hash- >> 20KHz... sounds cool... hatak sa BASS(what the D-amps are "famous" for) hindi naman porket D-amp eh parang BASS booster..its just that it can reproduce MORE accurately the input...  high-eff diba? |
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Born2BeWired
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« Reply #6 on: May 09, 2008, 01:30:17 PM » |
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Class D power amp, that was my college thesis. During our time, there was no PC, no internet, no published (complete) circuit of PWM amp for audio use. Little information is available, just ideas. My mentor advised me to forget it, they believed I cannot make some circuit out of fragmented ideas. But I did go for it. I succesfully designed a circuit and build a working prototype of a 100W RMS class D audio power amp. Kaya ang nangyari during my defense, the defense panel poked, sniffed, and play around with my prototype, murmuring among themselves. Not a single question was asked, they just gave me my 1.0. Memories of good ol' days  |
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Electronics <- Once you got a taste of it, you will never get enough.
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RaffT
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« Reply #7 on: May 09, 2008, 04:02:36 PM » |
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Class D power amp, that was my college thesis. During our time, there was no PC, no internet, no published (complete) circuit of PWM amp for audio use. Little information is available, just ideas. My mentor advised me to forget it, they believed I cannot make some circuit out of fragmented ideas. But I did go for it. I succesfully designed a circuit and build a working prototype of a 100W RMS class D audio power amp. Kaya ang nangyari during my defense, the defense panel poked, sniffed, and play around with my prototype, murmuring among themselves. Not a single question was asked, they just gave me my 1.0. Memories of good ol' days wow! thats cool... I believe its a "discrete" type?? or using comparators? or triangle wave gen?  hehe tingin ko sa nag panel sa thesis mo, lang alam about switching amps kaya 1.0 agad.. hehehe |
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rommelpm
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« Reply #8 on: May 25, 2008, 02:27:45 AM » |
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I succesfully designed a circuit and build a working prototype of a 100W RMS class D audio power amp.
Bossing, may naitago ka pa bang schematics nung class D power amp mo? sana i post mo one day...thanx |
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akosiikem
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« Reply #9 on: August 19, 2008, 06:32:31 PM » |
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IMO. Hindi talaga practical mag DIY ng class D amp.
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@!#@$@$%@#^%^@!#!
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Bryan18
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« Reply #10 on: September 01, 2008, 08:47:51 PM » |
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cool man aus cya no ic's matibay un gumawa......hehehe
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RaffT
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« Reply #11 on: September 01, 2008, 09:56:25 PM » |
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IMO. Hindi talaga practical mag DIY ng class D amp.
agree... hindi ito pang begginer level... NOISE kasi pag hndi properly bulit.. lalo na PS filtering... and ALL class D amps have LC output filters... very critical ito pagdating dito... wont help IF no knowledge on WHAT to do ...wrongly built L will *kill* output mosfet/s...and an LC meter *is a must*.. jsut my cents worth pero meron din yung alexan featured project nito.. 2W rms lang yata... just to prove the concept... pwede yun pang beginner... |
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Learning is CooL! BEAM robotics/DIY UCD180/PSP/AC wtmtr/digiESRmtr/PICkit™2 clone/SGTC/SSTC/DR-SSTC
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backspace
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« Reply #12 on: November 28, 2009, 03:29:57 PM » |
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Class D power amp, that was my college thesis. During our time, there was no PC, no internet, no published (complete) circuit of PWM amp for audio use. Little information is available, just ideas. My mentor advised me to forget it, they believed I cannot make some circuit out of fragmented ideas. But I did go for it. I succesfully designed a circuit and build a working prototype of a 100W RMS class D audio power amp. Kaya ang nangyari during my defense, the defense panel poked, sniffed, and play around with my prototype, murmuring among themselves. Not a single question was asked, they just gave me my 1.0. Memories of good ol' days cool, but class D still long way to go. still a lot of improvement on audio application compare to Class AB, though Sony is now using this on low-end product re-branding as S master digital amplifier using TI product. Main advantage is efficiency, no need of huge transformer for high wattage output. No huge heatsink since efficiency is high and less heat dissipated during the process. |
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tony
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« Reply #13 on: December 01, 2009, 06:08:43 PM » |
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ano ba ang mga advatages ng class-D amplifier? Huh higher efficiency? Huh with class D, 90% is normal....with class B 64%, with class A, 25 to 50%..... |
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in electronics, as in everyday life, there is always a reason for doing things...and if you can not explain why you want to do what you are about to do, better stop or else magic smoke will come out, safety first is the best policy here.....kuha mo?
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piona
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« Reply #14 on: December 01, 2009, 06:47:31 PM » |
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parang ang problema ng class D ay all-in-amp siya hehehehe....with a good dsp i think it would be an exellent amp.
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Woots29
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« Reply #15 on: October 12, 2010, 07:54:02 AM » |
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rdpzycho
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« Reply #16 on: October 18, 2010, 02:27:38 AM » |
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^ hindi lang parang parehas sis, 'yan din 'yun. hehe. nagtrabaho sa Philips (NXP) 'yung gumawa ng Universal Class D tapos umalis siya noong binili 'yung rights sa UCD nung isang company.
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"Keep on starting, and finishing will take care of itself."
- Neil Fiore
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Woots29
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« Reply #17 on: October 18, 2010, 05:42:56 AM » |
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oo nga no hehehe . stable kaya ito sa 2 ohm load?
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jiggins20
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« Reply #18 on: December 12, 2010, 08:30:10 AM » |
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oo nga no hehehe . stable kaya ito sa 2 ohm load?
same here... |
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Audio amp addict
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marcelino
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« Reply #19 on: January 19, 2011, 09:45:48 PM » |
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may class-d amps ba as guitar amps? napaisip lang...  |
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"Don't take life seriously. After all, no one has ever come out of it alive. -Bugs Bunny"
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The Philippine Electronics and Technology Forum
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February 14, 2009, 06:10:14 PM
Class A Amplifier/Topology
