• State TI Thinks Resolved
  • Locked Locked
  • Replies 2 replies
  • Answers 1 answer
  • Subscribers 63 subscribers
  • Views 575 views
  • Users 0 members are here
Support feedback
Options
Options
Similar topics

This thread has been locked.

If you have a related question, please click the "Ask a related question" button in the top right corner. The newly created question will be automatically linked to this question.

TPS92310: 180 -500 VAC LED driver

Star Xu
Genius 9645 points
Part Number: TPS92310
Other Parts Discussed in Thread: LM3447, UCC28810, LM3445

Hi

My customer looking for  led driver DC flyback topology for Wide input AC voltage range operation (180 -500 VAC) ?
Or can you suggest me any technique which cause we can clamp higher ac voltage ?

Thanks

Star

  • 0
    TI__Mastermind 25500 points

    Hello Star,

    I will forward this to our AC-DC expert. You should get a response after the weekend.

    Regards,

    Clint

  • 0
    TI__Mastermind 28655 points

    Hello Star,

    I'm not sure what you mean by 'clamp higher ac voltage'.  A flyback can be designed to run from that input range, the components need to be selected correct to make sure it can handle the high input voltage, 500 VAC at the peak is 707 volts.  Add the flyback voltage to this (say 200 volts or so) and the MOSFET will see 907 volts not including overshoot from leakage and input surge.  I would expect to use something like a 1500 VDS rated MOSFET (higher if needed or lower if possible).  One hard part will be the creepage and clearance if this needs to meet safety regulations, this includes primary to secondary spacing, primary to earth ground if it is in this design and the transformer design.

    What output voltage, current, power is this?  You'll have to chose a controller that does not have an internal MOSFET.  LM3447, LM3445, UCC28810/11 as well as others could work for this depending on your power level.

    Regards,