App note: Power supply over-current and over-temperature protection

Posted on Saturday, December 15th, 2012 in app notes by DP


Next up in our power supply theme is over-current and over-temperature protection for power supplies. The circuit cuts power in case one of these two events happen, it also has an external shutdown pin so the supply can be controlled by a switch or microcontroller.

When it is necessary to plug in a board into a system that is currently powered, it is critical to control the inrush current to prevent damage/system fault conditions. This application provides a simple circuit to achieve this function as well as an easy method for resetting the system and monitoring against temperature issues.

This entry was posted on Saturday, December 15th, 2012 at 9:00 pm and is filed under app notes. You can follow any responses to this entry through the RSS 2.0 feed. You can skip to the end and leave a response. Pinging is currently not allowed.

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Recent Comments

  • Kurt: Getting an inch of snow is like winning 10 cents in the lottery.
  • Tepa: Me pcb 😃
  • hli: Sunday++
  • Drone: The LM7171 used in this very simple design can be simulated in LTspice with reasonable results at 10MHz using the non-encrypted PSPICE model from TI...
  • Jon Jackson: I would be interested in 1 or 2 of your circuit boards. Jon