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

2 Overview

The TMCS1123 Hall-effect current-sense amplifier (also called an isolated current-sense amplifier) senses magnetic flux generated from current passing through the lead frame at common-mode voltages from 0 VDC to ±1100 VDC, independent of the supply voltage. The device is available with zero-input reference point configurations of 0.5 × VS (A), 0.33 × VS (B), and 0.1 × VS (C), with five fixed sensitivities available: 25 mV/A, 50 mV/A, 75 mV/A, 100 mV/A, and 150 mV/A. These devices operate from a single 3-V to 5.5-V power supply, drawing a maximum of 9.2 mA of supply current. The TMCS1123 is currently available in a 10-pin, SOIC, fused lead, surface-mount package. Table 2-1 lists the available sensitivity options.

Table 2-1 TMCS1123Ax Device Summary
PRODUCTREFERENCE POINTSENSITIVITY
TMCS1123A1

2.5 V

25 mV/A

TMCS1123A2

2.5 V

50 mV/A

TMCS1123A3

2.5 V

75 mV/A

TMCS1123A4

2.5 V

100 mV/A
TMCS1123A5

2.5 V

150 mV/A

TMCS1123B1

1.65 V

25 mV/A

TMCS1123B2

1.65 V

50 mV/A

TMCS1123B3

1.65 V

75 mV/A

TMCS1123B4

1.65 V

100 mV/A

TMCS1123B5

1.65 V

150 mV/A

TMCS1123C1

0.33 V

25 mV/A

TMCS1123C2

0.33 V

50 mV/A

TMCS1123C3

0.33 V

75 mV/A

TMCS1123C4

0.33 V

100 mV/A

TMCS1123C5

0.33 V

150 mV/A