My TPA3123 25+25W bridge proto-amp - diyAudio
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Old 18th November 2010, 05:36 PM   #1
macky is offline macky  Philippines
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Default My TPA3123 25+25W bridge proto-amp

just wanna share my jungle-like proto of TI's Class D chip TPA3123 [25W+25W] bridged amp, this sounds great!

The bridging adapter:
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the chip:
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testing:
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Old 28th December 2010, 09:29 AM   #2
superR is offline superR  Netherlands
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What schematic have you used? I am interested in using the chip, but I can't seem to find a fool-proof schematic for TI's class D chips
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Old 29th December 2010, 08:20 PM   #3
macky is offline macky  Philippines
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i did use the schematic from its datasheet, and compared it on EVM user guide...
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Old 2nd March 2011, 05:12 PM   #4
350650 is offline 350650  India
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i also completed the ic based on application schematic diagram but its not working. i didnt wnt through the evm though
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Old 11th March 2011, 11:48 PM   #5
macky is offline macky  Philippines
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^maybe you forgot the SHUTDOWN / MUTE pins configuration? check it out bro...
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Old 11th October 2015, 03:56 AM   #6
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Quote:
Originally Posted by macky View Post
just wanna share my jungle-like proto of TI's Class D chip TPA3123 [25W+25W] bridged amp
hi Macky, was this outputting real 50 watts for you? This thread says maybe not:
https://answers.yahoo.com/question/i...4142625AAXvN9X

also (anybody), looking at this kit, can you wager a guess whether it can be used in bridge mode without modification?
Digital Stereo Amplifier Class D Power Amp Kit Mini Audio Ampli Module 25WX2 Sz | eBay

thx!
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Old 11th October 2015, 01:06 PM   #7
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You can get 50Wpc BTL out of it in a 4 ohm load with the max supply voltage.
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Old 11th October 2015, 01:08 PM   #8
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Quote:
Originally Posted by lutkeveld View Post
You can get 50Wpc BTL out of it in a 4 ohm load with the max supply voltage.
per channel?

thx
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Old 11th October 2015, 02:10 PM   #9
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Yeah (Wpc=watts per channel)
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Old 11th October 2015, 05:13 PM   #10
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Quote:
Originally Posted by lutkeveld View Post
Yeah (Wpc=watts per channel)
i thought BTL (Bridge Tied Load) means both channels feed a single speaker, so it's a MONO system. -- so there's no "per channel", because there's only one channel.
https://en.wikipedia.org/wiki/Bridge-tied_load

Am i wrong?

Also, the TPA3123 is rated at 25WPC max, so there's no way to get 50WPC in a stereo config with two speakers.
http://www.ti.com/product/tpa3123d2

Am i wrong?

thx!
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