• State TI Thinks Resolved
  • Locked Locked
  • Replies 1 reply
  • Answers 1 answer
  • Subscribers 63 subscribers
  • Views 253 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.

LM2585: Current Limit

Shinu.V.Mathew
Genius 10160 points
Part Number: LM2585

Hi Team,

One of my customer is facing issues with device during output short circuit test. The flyback output is designed for 15V/1.2A from 24V input. For UL safety tests the output is shorted and observed that the device current is not limiting and output is not shutting down. This results in transformer saturation and failure. Can you please help with quick suggestion to address this issue.

Thanks in advance for the help and support. 

  • 0
    TI__Mastermind 30965 points

    Hi Shinu,

    Can you provide the schematic? 

    For the LM258x series, over-current behavior is not enabled until soft-start is complete, which is based off of the feedback pin and error-amplifier. If you have grounded feedback, overcurrent protection will not be enabled, since the part's internal soft-start is never completed. 

    Therefore, you will need an external circuit to implement the overcurrent protection feature. 

    Thanks,

    Richard