SLYU055A January   2020  – November 2020 TMAG5124

 

  1. 1Trademarks
  2. 2Overview
    1. 2.1 TMAG5124EVM Kit Contents
    2. 2.2 Related Documentation From Texas Instruments
  3. 3Hardware
    1. 3.1 Features
  4. 4Quick Start
    1. 4.1 Option 1: Single 5-V Supply
    2. 4.2 Option 2: Separate VCC and 5-V Supply
    3. 4.3 Measurements
    4. 4.4 Standalone Measurements
  5. 5Circuitry
    1. 5.1 TMAG5124 Coupon Boards
    2. 5.2 Logic, Feedback, and Display
    3. 5.3 J5
  6. 6Schematic, PCB Layout, and Bill of Materials
    1. 6.1 Schematic
    2. 6.2 PCB Layout
    3. 6.3 Bill of Materials
  7. 7Revision History

4.4 Standalone Measurements

It is possible to set up and capture measurements with only a TMAG5124EVM coupon board. This allows testing of the full VCC range of the TMAG5124:

  1. Connect an external DC supply voltage to the VCC connection point on the EVM, which sets the voltage to the desired level. Ensure that this supply is powered down for now.
  2. Connect a wire from GND on the EVM to a selected resistor value.
  3. Connect the remaining side of the resistor to the V- side of the external DC supply. When this is complete, verify that the setup is as shown in Figure 4-1 below.
  4. Power on the supply. Based on the selected resistor value, VSENSE changes with the corresponding change in current by Equation 1 below.

GUID-C4865EB6-16EA-4D6E-A714-561535F6A623-low.gifFigure 4-1 TMAG5124EVM Coupon Board Standalone Diagram
Equation 1. VSENSE=ICC*R