SLYU056 June   2020 TMAG5123 , TMAG5123-Q1

 

  1.   TMAG5123EVM
    1.     Trademarks
    2. 1 Overview
      1. 1.1 TMAG5123EVM Kit Contents
      2. 1.2 Related Documentation From Texas Instruments
    3. 2 TMAG5123EVM Hardware
      1. 2.1 Features
    4. 3 Quick Start Setup and Use
      1. 3.1 Measurements
    5. 4 TMAG5123EVM Circuit
      1. 4.1 Micro-USB Receptacle
      2. 4.2 Test Socket
      3. 4.3 LED Control
    6. 5 TMAG5123EVM Schematic and PCB Layout
      1. 5.1 Schematic
      2. 5.2 PCB Layout
    7. 6 Bill of Materials

4.3 LED Control

R1 functions as a pullup resistor for the open-drain output of the TMAG5123.

R2 is a current-limiting resistor to control the output intensity of the signal diode D1.

While not normally populated, C3 is an optional SMT pad for capacitor placement, forming a first-order low pass filter with the pullup resistor.