• State Resolved
  • Locked Locked
  • Replies 1 reply
  • Subscribers 63 subscribers
  • Views 155 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.

TPS82130: Overcurrent Protection

Priya Lakshmi
Prodigy 80 points
Part Number: TPS82130

Hi,

I am trying to understand if the overcurrent protection is functioning as expected. I have a 3.3V rail generated from TPS82130. I am loading the output in steps and probing the output. I see some kind of hiccup behavior at the output but the frequency of the hiccup itself changes. As the overload current increases, frequency starts to increase. Is this the expected behavior as per the switch current limit circuitry?

Thanks,

Priya

  • 0
    TI__Mastermind 45970 points

    Hi Priya,

    TPS82130 doesn't have the OCP hiccup. It is only cycle by cycle current limit. If the inductor peak current reaches the switch current limit after a propagation delay of typical 30ns, the high-side FET is turned off and the low side FET is turns on to ramp down the inductor current. It is frequent to reach the current limit with 15A load current. So the the "frequency" looks higher. It is not frequent to reach current limit with 4.2A load current. So the "frequency" looks lower. It is expected behavior.

    Hope this help!

    Thanks,

    Nancy