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TL494 based high wattage computer power supplies?

Discussion in 'Power Electronics' started by jon5500, Dec 8, 2020.

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  1. jon5500


    Oct 31, 2020
    Looking for brand/ model listings of any PC power supplies utilizing the TL494 and offering at least 20A on the 12V line. Thank you.
  2. Harald Kapp

    Harald Kapp Moderator Moderator

    Nov 17, 2011
    I doubt you will find one. The TL494 is a low voltage pwm controller (Vmax = 41 V). A PC power supply usually has a primary side (mains voltage) switch mode controller. A TL494 cannot be used efficiently in this application (note that it may be used with additional auxiliary circuitry, but that is not efficient neither in cost nor in power requirements).

    What is the reason you're looking for a TL494 based power supply? 20 A on 12 V can be delivered by many off the shelf PC power supplies.
    davenn likes this.
  3. jon5500


    Oct 31, 2020
    Because they are the easiest type to modify for different currents and voltages. Although I never found a list of such ones anywhere, after rather intensive Googling, I did find what I was looking for
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