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.
The LMP8646 accepts input signals with a common-mode voltage ranging from –2 V to 76 V. It has a variable gain which is used to adjust the sense current. The gain is configured with a single external resistor, RG, providing a high level of flexibility and accuracy up to 2%. The adjustable bandwidth, which allows the device to be used with a variety of applications, is configurable with a single external capacitor in parallel with RG. In addition, the output is buffered in order to provide a low output impedance.
The LMP8646 is an ideal choice for industrial, automotive, telecommunications, and consumer applications where circuit protection and improved precision systems are required. The LMP8646 is available in a 6-pin SOT package and can operate at temperature range of −40°C to 125°C.
| Type | Title | Date | ||
|---|---|---|---|---|
| * | Data sheet | LMP8646 Precision Current Limiter datasheet (Rev. B) | PDF | HTML | 08 Dec 2014 |
| Application note | Using a PCB Copper Trace as a Current-Sense Shunt Resistor | PDF | HTML | 25 Jan 2022 | |
| Selection guide | Power Management Guide 2018 (Rev. R) | 25 Jun 2018 | ||
| Application brief | Precision LED Brightness and Color Mixing With Discrete Current Sense Amplifiers | 28 Feb 2017 | ||
| Application note | AN-2219 Precision Current Limiting with the LMP8646 and LP38501 (Rev. A) | 24 Apr 2013 | ||
| Application note | AN-2200 Precision Current Limiting with the LMP8646 and LMZ12003 (Rev. A) | 23 Apr 2013 | ||
| Application note | AN-2218 Precision Current Limiting with the LMP8646 and LM3102 (Rev. A) | 23 Apr 2013 | ||
| User guide | LMP8646EB User's Guide | 13 Feb 2012 |
For additional terms or required resources, click any title below to view the detail page where available.
The LMP8646 Evaluation Board (LMP8646EB) is designed to ease evaluation and design-in of TI's LMP8646, a Precision Current Limiter. The LMP8646 is used to detect small differential voltages across a sense resistor in the presence of high input common mode voltages. On board with the current (...)
The TPS63802HDKEVM is a universal development tool designed to help the users easily and quickly evaluate and test the most common buck-boost converter use-cases. The use-cases include backup power, input current limit, LED driver, digital voltage scaling, bypass mode and precise enable. The user (...)
| Package | Pins | CAD symbols, footprints & 3D models |
|---|---|---|
| SOT-23-THN (DDC) | 6 | Ultra Librarian |
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