SLVUCV2 September   2024 TPS4HC120-Q1

 

  1.   1
  2.   Description
  3.   3
  4.   Features
  5.   Applications
  6.   6
  7. 1Evaluation Module Overview
    1. 1.1 Introduction
    2. 1.2 Kit Contents
    3. 1.3 Specification
    4. 1.4 Device Information
  8. 2Hardware
    1. 2.1 Connection Descriptions
      1. 2.1.1 Connections and Test Points
      2. 2.1.2 Jumper Configurations
  9. 3Implementation Results
    1. 3.1 Variable Resistor for CS and CL
      1. 3.1.1 Current Sense Resistor
      2. 3.1.2 Adjustable Current Limit
  10. 4Hardware Design Files
    1. 4.1 TPS4HC120-Q1 Schematic
    2. 4.2 TPS4HC120-Q1 EVM Assembly Drawings and Layout
    3. 4.3 Bill of Materials
  11. 5Additional Information
    1. 5.1 Trademarks

3.1.2 Adjustable Current Limit

The current limit regulates the output current to a set value. The EVM can be designed to hold different current limit values through an external resistor on the ILIM pin. There are 10 settings that can be set based on RLIM. 1% tolerance resistors needs to be used in this application. R14 is the pad used for the adjustable current limit control.

Table 3-1 Current Limit Setting Through External Resistor
Resistor ValueVoltage InputILIM Threshold

57.6kΩ

0.06V

250mA

43.2kΩ

0.117V

500mA

31.6kΩ

0.234V

750mA

23.2kΩ

0.396V

1A

16.5kΩ

0.557V

1.25A

9.76kΩ

0.758V

1.5A

4.87kΩ

1.037V

1.75A

2.49kΩ

1.382V

2A

Short to GND

0V

2.25A

Open (> 80kΩ)

2.2V

5A