App note: Precision current limiting with the LMP8646

Posted on Sunday, June 17th, 2012 in app notes by DP

Here is an app note from Texas Instruments describing how to use their LMP8646 ‘shunt’ current monitor as a current limiter on linear, and switching power supplies.

The LMP8646 is a precision current limiter used to improve the current limit accuracy of any switching or linear regulator with an available feedback node. Many regulators might have an internal current limiter, but its output accuracy is often as high as 30%. The output accuracy of the LMP8646 can be as low as 3%, making it a preferred current limiter for many regulator applications.

This entry was posted on Sunday, June 17th, 2012 at 1:00 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.

2 Responses to “App note: Precision current limiting with the LMP8646”

  1. r4k says:

    I’m always worried when I key a part number into octopart and get *zero* availability…

  2. Stephen Hill says:

    You can get them from DigiKey but only in TSOT-6 and a minimum order of 1,000 with a lead time of 14 weeks.

Leave a Reply

Notify me of followup comments via e-mail. You can also subscribe without commenting.

Recent Comments

  • 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
  • Max: An actual Saturday "detector" built with the same hardware would use the precisely timed slightly varying length of the day (and some built-in astronomy data)...
  • KH: In the old days, these things remained on paper forever as whimsical scrawls. Today, they are brandished about on blogs for the entire world to...
  • KH: So he doesn't really know what he's doing. Yawn. It's sensor-controlled. It's not an oscillator. A leaf covers the window, you're toast. TLV3702? Overkill. The...