SLVS934C June   2009  – February 2021 TLC59025

PRODUCTION DATA  

  1. 1 Features
  2. 2 Applications
  3. 3 Description
  4. 4 Revision History
  5. 5 Pin Configuration and Functions
  6. 6 Specifications
    1. 6.1  Absolute Maximum Ratings
    2. 6.2  ESD Ratings
    3. 6.3  Recommended Operating Conditions
    4. 6.4  Thermal Information
    5. 6.5  Electrical Characteristics for 3-V Input Voltage
    6. 6.6  Electrical Characteristics for 5.5-V Input Voltage
    7. 6.7  Power Dissipation Ratings
    8. 6.8  Timing Requirements
    9. 6.9  Switching Characteristics for 3-V Input Voltage
    10. 6.10 Switching Characteristics for 5.5-V Input Voltage
    11. 6.11 Typical Characteristics
  7. 7 Parameter Measurement Information
  8. 8 Detailed Description
    1. 8.1 Overview
    2. 8.2 Functional Block Diagram
    3. 8.3 Feature Description
      1. 8.3.1 Constant Current
    4. 8.4 Device Functional Modes
  9. 9 Application and Implementation
    1. 9.1 Application Information
      1. 9.1.1 Turning on the LEDs
    2. 9.2 Typical Application
      1. 9.2.1 Design Requirements
      2. 9.2.2 Detailed Design Procedure
        1. 9.2.2.1 Adjusting Output Current
      3. 9.2.3 Application Curve
  10. 10Power Supply Recommendations
  11. 11Layout
    1. 11.1 Layout Guidelines
    2. 11.2 Layout Example
  12. 12Device and Documentation Support
    1. 12.1 Support Resources
    2. 12.2 Trademarks
    3. 12.3 Electrostatic Discharge Caution
    4. 12.4 Glossary
  13. 13Mechanical, Packaging, and Orderable Information

Package Options

Mechanical Data (Package|Pins)
Thermal pad, mechanical data (Package|Pins)
Orderable Information

9.2.2.1 Adjusting Output Current

TLC59025 sets IOUT based on the external resistor REXT. Users can follow the below formula to calculate the target output current IOUT,target in the saturation region:

IOUT,target = (1.21 V / REXT) × 15.5

Where REXT is the external resistance connected between R-EXT and GND. Using this equation, the output current is calculated to be approximately 26 mA at 720 Ω and 13 mA at 1440 Ω.