SBOU241E April   2020  – August 2022 INA228 , INA229 , INA237 , INA238 , INA239

 

  1.   SBOU241 Abstract
  2. 1Trademarks
  3.   General Texas Instruments High Voltage Evaluation (TI HV EVM) User Safety Guidelines
  4. 2Overview
    1. 2.1 Kit Contents
    2. 2.2 Related Documentation From Texas Instruments
  5. 3Hardware
    1. 3.1 Features
  6. 4Operation
    1. 4.1 Quick Start Setup
    2. 4.2 EVM Operation
      1. 4.2.1 Setup
        1. 4.2.1.1 Driver Installation
        2. 4.2.1.2 Firmware
          1. 4.2.1.2.1 Firmware Debug
        3. 4.2.1.3 GUI Setup and Connection
          1. 4.2.1.3.1 Initial Setup
          2. 4.2.1.3.2 GUI to EVM Connection
      2. 4.2.2 GUI Operation
        1. 4.2.2.1 Homepage Tab
        2. 4.2.2.2 Configuration Tab
        3. 4.2.2.3 Registers Tab
        4. 4.2.2.4 Results Data Tab
      3. 4.2.3 Current Sensing Operation
        1. 4.2.3.1 Detailed Setup
      4. 4.2.4 Direct EVM USB Communication
        1. 4.2.4.1 Standard USB Read and Write Operations
        2. 4.2.4.2 Collect Data Through the USB BULK Channel
      5. 4.2.5 PAMB Compatibility
  7. 5Circuitry
    1. 5.1 Current Sensing IC
    2. 5.2 Input Signal Path
    3. 5.3 Digital Circuitry
      1. 5.3.1 I2C (INA228, INA237, INA238)
      2. 5.3.2 SPI (INA229, INA239)
  8. 6Schematics, PCB Layout, and Bill of Materials
    1. 6.1 Schematics
      1. 6.1.1 SENS063 (INA228EVM, INA237EVM, INA238EVM)
      2. 6.1.2 SENS064 (INA229EVM, INA239EVM)
    2. 6.2 PCB Layout
      1. 6.2.1 SENS063 (INA228EVM, INA237EVM, INA238EVM)
      2. 6.2.2 SENS064 (INA229EVM, INA239EVM)
    3. 6.3 Bill of Materials
      1. 6.3.1 SENS063 (INA228EVM, INA237EVM, INA238EVM)
      2. 6.3.2 SENS064 (INA229EVM, INA239EVM)
  9. 7Revision History

5.1 Current Sensing IC

This section describes the main INA device and supporting components.

U1 is the main INA current-sensing device (either the INA228, INA229, INA237, INA238, or INA239). C1 and C2 are bypass capacitors that are placed near the sensor to help mitigate power supply noise and provide current quickly to the device when needed. LED D1 with current limiting resistor R4 are used to indicate when the EVM is powered on.

The device pins can be monitored directly through the test points TP1 – TP12. Note that there are two extra test points on GND for convenience.