Ultra Simple Class D - Page 11

abetir · 10th April 2012, 09:38 AM

OK thanks, will double check them again I am also using IRF9540N/540N for the output.

norazmi · 10th April 2012, 10:54 AM

is it T106-2 iron powder? Seems like yellow T106-26 to me...

Simon B · 10th April 2012, 10:59 AM

Interesting thread. Just to let others see something of the schematics and pcb layout more easily, here are screenshots of them. For the original pdf file, see early part of thread.

Note that the output inductor is NOT shown either on the schematic or the pcb layout - whether air or ferrite cored it probably deserves to be tied down somehow.

Schematic.gif

Copper.gif

Components.gif

abetir · 10th April 2012, 11:45 PM

Quote:

Originally Posted by norazmi

is it T106-2 iron powder? Seems like yellow T106-26 to me...

It is Red with Brown color on the other side, the yellowish glow must've been the cam flash effect

norazmi · 12th April 2012, 05:01 PM

ohh.. nice, those bds run little hot at +/- 50vdc but they still survive. IRF540N and IRF9540N is a good combination. nice setup. u need good power supply they will suck big current from it.

pergo · 12th April 2012, 05:05 PM

use MJE340 & co.?

norazmi · 12th April 2012, 05:06 PM

no MJES hehe

pergo · 12th April 2012, 05:07 PM

too good to be used

abetir · 12th April 2012, 11:40 PM

Hi!

check post #54 by Rezamir, it looks like MJEs do not work in harmony on this circuit.

abetir · 12th April 2012, 11:43 PM

Quote:

Originally Posted by norazmi

ohh.. nice, those bds run little hot at +/- 50vdc but they still survive. IRF540N and IRF9540N is a good combination. nice setup. u need good power supply they will suck big current from it.

thanks Norazmi, will take note of that

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10th April 2012, 10:54 AM	#102
norazmi diyAudio Member Join Date: Feb 2008	is it T106-2 iron powder? Seems like yellow T106-26 to me...

10th April 2012, 10:59 AM	#103
Simon B diyAudio Member Join Date: Dec 2011 Location: North-East England	Interesting thread. Just to let others see something of the schematics and pcb layout more easily, here are screenshots of them. For the original pdf file, see early part of thread. Note that the output inductor is NOT shown either on the schematic or the pcb layout - whether air or ferrite cored it probably deserves to be tied down somehow. Schematic.gif Copper.gif Components.gif

12th April 2012, 05:01 PM	#105
norazmi diyAudio Member Join Date: Feb 2008	ohh.. nice, those bds run little hot at +/- 50vdc but they still survive. IRF540N and IRF9540N is a good combination. nice setup. u need good power supply they will suck big current from it.

12th April 2012, 05:05 PM	#106
pergo diyAudio Member Join Date: Dec 2008	use MJE340 & co.?

12th April 2012, 05:06 PM	#107
norazmi diyAudio Member Join Date: Feb 2008	no MJES hehe

12th April 2012, 05:07 PM	#108
pergo diyAudio Member Join Date: Dec 2008	too good to be used

12th April 2012, 11:40 PM	#109
abetir diyAudio Member Join Date: Nov 2010 Location: Easternmost Region V	Hi! check post #54 by Rezamir, it looks like MJEs do not work in harmony on this circuit.