Universal Class D Amplifier

[rdpzycho]

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

[Shey]

wow Class-D amp

[RaffT]

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

Yeah it works.. pero yung schema na naka attach sa PDF is too simple..and no actual part value...

[danny]

thanks for posting

['yus]

 meron na bang Class-S amplifier? hehe 
ano ba ang mga advatages ng class-D amplifier? higher efficiency?

[RaffT]

meron na bang Class-S amplifier? hehe 
ano ba ang mga advatages ng class-D amplifier? higher efficiency?

 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?

[Born2BeWired]

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

[RaffT]

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

[rommelpm]

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

[akosiikem]

IMO. Hindi talaga practical mag DIY ng class D amp.

[Bryan18]

cool man aus cya no ic's matibay un gumawa......hehehe

[RaffT]

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...

[backspace]

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.
 

[tony]

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%.....

[♪ ♫ ♫ ♪ ♪ ♪ ♫ ♫ ♫]

parang ang problema ng class D ay all-in-amp siya hehehehe....with a good dsp i think it would be an exellent amp.

[Woots29]

parang pareho dito ah

http://www.nxp.com/documents/user_manual/UM10155.pdf

[rdpzycho]

^ 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.

[Woots29]

oo nga no hehehe . stable kaya ito sa 2 ohm load?

[jiggins20]

oo nga no hehehe . stable kaya ito sa 2 ohm load?

same here...

[marcelino]

may class-d amps ba as guitar amps?

napaisip lang...