SBOU284 april   2023 INA310A , INA310B

 

  1.   SBOU284 Abstract
  2.   Trademarks
  3.   General Texas Instruments High Voltage Evaluation (TI HV EVM) User Safety Guidelines
  4. 1Overview
    1. 1.1 Kit Contents
    2. 1.2 Related Documentation From Texas Instruments
  5. 2Hardware
    1. 2.1 Features
  6. 3Operation
    1. 3.1 Quick Start Setup
    2. 3.2 Measurements
      1. 3.2.1 Detailed Setup
    3. 3.3 Comparator
  7. 4Circuitry
    1. 4.1 Current Sensing IC
    2. 4.2 Input Signal Path
    3. 4.3 Device Output and Comparator
  8. 5Schematics, PCB Layout, and Bill of Materials
    1. 5.1 Schematics
    2. 5.2 PCB Layout
    3. 5.3 Bill of Materials

4.3 Device Output and Comparator

This section describes the circuitry around the output and comparator of the device.

R4 and C3 are used for an optional output filter. C3 is left unpopulated and R4 is populated with a 0-Ω resistor by default.

R5 and R6 are used as a voltage divider to set the threshold at CMPin. By default, these resistors are set with R5 = 10.2 kΩ and R6 = 3.4 kΩ so that the voltage at CMPin is 1/4th the voltage of OUT, causing the comparator to trip when the output voltage is at 2.4 V.

R8 is the pullup resistor for the active high comparator alert pin CMPout. LED D1 and current-limiting resistor R7 are used with the N-Channel MOSFET Q1 to indicate when the ALERT pin is triggered.

Switch SW1 is used to put the comparator in either latch or transparent mode. When in latch mode, SW1 can be moved to the reset position to clear the alert. The switch will then automatically return to the latch position.