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Low operating voltage version of a TL494?

Prodigy 20 points

Replies: 2

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Is there a PWM controller similar to the TL494 that can operate with a supply voltage of 5VDC? I need push-pull outputs with some level of dead-time control. Will be using MOSFETS to drive a center-tapped transformer at 105Hz (not KHz).

Thanks!

Mark

  • Mark,

    see teh attached Power Management Guide Page 43

    John

    John Bottrill

    Power management guide 2011.pdf
  • In reply to John Bottrill:

    John,

    Thanks for the quick response!

    The only push-pull chips listed that could meet my supply voltage requirements (5-14VDC) seems to be the UCC28250 and the UCC3808  but unfortunately their minimum switching frequency (85KHz and 175KHz) are way too high for my application (120 Hz), Do you know of any other alternatives or can these chips (particularly the UCC3808) be run at a slower frequency? I have run the TL474 at this rate which is about 1/10th of its rated minimum.

    Thanks again for your help,

    Mark

    Carr Engineering, Inc.

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