SLVUD77A March   2025  – September 2025 TPS482H85-Q1

 

  1.   1
  2.   Description
  3.   Features
  4.   Applications
  5.   5
  6. 1Evaluation Module Overview
    1. 1.1 Introduction
    2. 1.2 Kit Contents
    3. 1.3 Specification
    4. 1.4 Device Information
  7. 2Hardware
    1. 2.1 Connections and Test Points
    2. 2.2 Jumper Information
    3. 2.3 Current Limit and Current Sense Configuration
    4. 2.4 Transient Protection
  8. 3Hardware Design Files
    1. 3.1 Schematic
    2. 3.2 PCB Layouts
    3. 3.3 Bill Of Materials (BOM)
  9. 4Additional Information
    1.     Trademarks
  10. 5Revision History

2.3 Current Limit and Current Sense Configuration

The current limit resistor connected to the ILIM pin configures the current limit of the TPS482H85-Q1 device. Based off the limit of this resistor, the allowed current that passes through the high side switch can be controlled. The TPS482H85EVM provides three ways of configuring the effective value of the resistance on the ILIM pin:

  • Connect J20 to short the ILIM pin to ground

  • Connect J21 to use a soldered down pad, R14
  • Connect J22 for R13 - 34.8kΩ

See the Section 2.2 for details on how to configure each one of these jumpers.

For the current sense resistance connected to the SNS pin, the SNS Pot Enable jumper controls the source. If this jumper is populated, then the SNS potentiometer is used to increase and decrease the resistance connected to the SNS pin. If this jumper is not populated, then one of the other jumpers must be used to provide the necessary resistance value. The output of the SNS pin of TPS482H85-Q1 is an analog current that is a representation of the load current going through the switch. The purpose of the sense resistor is to convert this current into a voltage so that an ADC can convert into a value for a microcontroller to use. For the TPS482H85EVM, the voltage across the sense resistor can either be read externally through the SNS test point.