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Thread: Bridge Chipamp based on TDA2050 60W

  1. #1
    diysmps Senior Member Lira's Avatar
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    Post Bridge Chipamp based on TDA2050 60W

    Hi,
    This time I drawed a bridge circuit for the TDA2050.
    Carefull on building this circuit, the ICs get a little warm even without signal, so, before you start testing, mount it in a heatsink. Every bridge configuration using tda20xx gets a little warm without signal, so, thats quite normal.
    The power and quality is good (Not great, just good), but its the best you can take on a 16v 0v 16v transformer. Built to be cheap!

    Hope you like it

    All the best

    Lira

    DIYSMPS
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    Studying electronic engineering
    Fanatic for audio
    Crazy for biiiiig speakers

  2. #2
    Old thread but simply had to reply.

    some 10 years ago I played with those chips alot. The heating issue may be caused by self oscillation. Those chips tend to do it. You could try to modify output zobel network or limit input bandwith. For 4 ohm applications I have tried current boosting circuitry with additional transistors. Schematic can be found here:
    http://album.ee/node/17065204/50126920

    The transistors can be whatever power BJT, MOSFETs or even IGBTs(if one can find P IGBTs). R3 needs to be changed only for proper current. It has to be calculated so, that the chip current is equal to transistor current.

  3. #3
    diysmps Senior Member Lira's Avatar
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    Quote Originally Posted by Cheopps View Post
    Old thread but simply had to reply.

    some 10 years ago I played with those chips alot. The heating issue may be caused by self oscillation. Those chips tend to do it. You could try to modify output zobel network or limit input bandwith. For 4 ohm applications I have tried current boosting circuitry with additional transistors. Schematic can be found here:
    http://album.ee/node/17065204/50126920

    The transistors can be whatever power BJT, MOSFETs or even IGBTs(if one can find P IGBTs). R3 needs to be changed only for proper current. It has to be calculated so, that the chip current is equal to transistor current.
    How do you calculate the R3 resistor?

    Thanks for your attention.
    Studying electronic engineering
    Fanatic for audio
    Crazy for biiiiig speakers

  4. #4
    Hey friend, I make this circuit ..I tested with a 12v +- 1amp transforma.I'm not getting sound from it..plz help me

  5. #5
    Hey friend, I make this circuit ..I tested with a 12v +- 1amp transforma.I'm not getting sound from it..plz help meBeautyPlus_20150828223240_save.jpg

  6. #6
    Any one plz help me out...

  7. #7
    Measure all the voltages on your board and write them on your schematic and post (insert Image on the toolbar) so we can see it.

    Standing by!

  8. #8
    Thanks... I'll post it

  9. #9
    diysmps Senior Member Lira's Avatar
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    Hi, i´m here to help too! I have a couple of this boards on an amplifier at my workshop. Post a cooper side picture, and detail all the problems that you have. By the way, you will need a good heatsink on it, because those tdas tend to operate very hot in this configuration. And there is a bridge on the underside of the capacitor on the right. I can´t see it on your picture, but check that bridge.

    Looking forward for your return

    Best Regards

    Lira
    Studying electronic engineering
    Fanatic for audio
    Crazy for biiiiig speakers

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