• State
  • Locked Locked
  • Replies 1 reply
  • Subscribers 63 subscribers
  • Views 277 views
  • Users 0 members are here
Support feedback
Options
Options
Related

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.

LM5020 in a Non-Isolated Flyback Config?

Shashank Reddi
Intellectual 1695 points
Other Parts Discussed in Thread: LM5020

Hi Team,

Customer needs to manage a 41v output at 300mA (inrush limited to 500mA) working from an input that could vary 10v to max 100v.

Because of the relatively low current out they are thinking a non-isolated flyback configuration would be best but wanted to do a sanity check to be sure.

Will an LM5020 in a non-isolated flyback configuration work for their needs?

 

Regards,

Shashank

  • 0
    TI__Guru* 78270 points

    First, when using the LM5020 in standalone, its operating Vin_min cannot be lower than 13V.   Also note that 100V is the LM5020's absolute maximum voltage seen by the VIN pin. 

    Except for the Vin range in said application,  the LM5020 is a good candidiate.  For use with VIN<13V, an external regulator is needed to bypass the internal startup regulator to supply VCC, such that it can start up at low Vin: The internal startup regulator requires VIN>=13V. 

    Best Regards,

    Youhao Xi, Applications Engineering, TI SVA-PPD