SBAU421B June   2023  – December 2023 TMCS1123

 

  1.   1
  2.   TMCS1123xEVM
  3.   Trademarks
  4. 1General Texas Instruments High Voltage Evaluation (TI HV EVM) User Safety Guidelines
  5. 2Overview
    1. 2.1 Kit Contents
    2. 2.2 Related Documentation From Texas Instruments
  6. 3Hardware
    1. 3.1 Features
    2. 3.2 Circuitry
      1. 3.2.1 Bypass Capacitors
      2. 3.2.2 Output Filter
      3. 3.2.3 Overcurrent Set Point and Overcurrent Circuitry
      4. 3.2.4 Load Connectors
      5. 3.2.5 TMCS1123 Isolated Current-Sense Amplifier
  7. 4Operation
    1. 4.1 Measurements
    2. 4.2 Advanced Measurement Tips
  8. 5Schematics, PCB Layout, and Bill of Materials
    1. 5.1 Schematics
    2. 5.2 PCB Layout
    3. 5.3 Bill of Materials
  9. 6Revision History

4 Operation

The following are instructions to set up and use the TMCS1123xEVM. Figure 4-1 shows an example of a simple, low-side setup on the A1 (25 mV/A) sensitivity variant. This device has isolation, and external supplies are distinguished by "high voltage" (HV) for load and "low voltage" (LV) for DUT supply. The HV supply can be isolated and at a different potential than the LV supply.

GUID-20230215-SS0I-MSQ7-J66F-VTQT0ZBJLB68-low.svg Figure 4-1 Low-Side Forward Current Setup for Reinforced Isolation
  1. For greater maneuverable flexibility, break apart the EVM sub boards along the score lines. Otherwise, the board can be left intact.
  2. Attach the high-current lug connectors to IN+ and IN– of the sensitivity version to be tested.
  3. Connect the terminals of an external LV supply to the GND and VCC test points on the EVM sensitivity variant of choice. Be sure to connect GND first and make sure that the external LV supply is between 3 V and 5.5 V.
  4. Connect the input per Section 4.1.
WARNING:

When measuring current, first make sure that equipment (wires, connectors, and so forth) can support the amperage and power dissipation. Secondly, make sure that current flowing through the inputs of the device is kept within the safe operating area limits of the device found in the TMCS1123 data sheet. Failure to do so can result in damage to the EVM, or personal injury.

Do not touch the HV terminals.

Hot surface. Contact can cause burns. Do not touch!