Looking for subwoofer classD using TL494

lumanauw · 12th March 2005, 09:11 AM

Does anyone has built a simple classD (subwoofer amp) design using TL494 or SG3524 (PWM driver)?
IVX uses TL494 in the SMPS section, what I look is TL494 in audio section.

bigbulb · 4th April 2005, 01:41 PM

Hi,
TL494 will not be stable when operate at frequency higher than 180KHz, the build in comparator (error amp) can't give you high slew rate, and produce more distortion.

Leolabs · 6th April 2005, 03:19 PM

I do come across Class D amp using SG3524,try this

http://schforfree.seedhost.com

12th March 2005, 09:11 AM	#1
lumanauw diyAudio Moderator Emeritus Join Date: Oct 2002 Location: Bandung	Looking for subwoofer classD using TL494 Does anyone has built a simple classD (subwoofer amp) design using TL494 or SG3524 (PWM driver)? IVX uses TL494 in the SMPS section, what I look is TL494 in audio section.

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4th April 2005, 01:41 PM	#2
bigbulb diyAudio Member Join Date: Aug 2004 Location: klamazoo	Hi, TL494 will not be stable when operate at frequency higher than 180KHz, the build in comparator (error amp) can't give you high slew rate, and produce more distortion.

6th April 2005, 03:19 PM	#3
Leolabs diyAudio Member Join Date: Dec 2004 Location: Bukit Mertajam	I do come across Class D amp using SG3524,try this http://schforfree.seedhost.com