SLVSC26B November   2013  – May 2024 TPS61162A , TPS61163A

PRODUCTION DATA  

  1.   1
  2. 1 Features
  3. 2 Applications
  4. 3 Description
  5. 4 Pin Configuration and Functions
    1.     Pin Functions
  6. 5 Specifications
    1. 5.1 Absolute Maximum Ratings
    2. 5.2 ESD Ratings
    3. 5.3 Recommended Operating Conditions
    4. 5.4 Thermal Information
    5. 5.5 Electrical Characteristics
    6. 5.6 EasyScale Timing Requirements
    7. 5.7 Typical Characteristics
  7. 6 Detailed Description
    1. 6.1 Overview
    2. 6.2 Functional Block Diagram
    3. 6.3 Feature Description
      1. 6.3.1  Boost Converter
      2. 6.3.2  IFBx Pin Unused
      3. 6.3.3  Enable and Start-up
      4. 6.3.4  Soft Start
      5. 6.3.5  Full-Scale Current Program
      6. 6.3.6  Brightness Control
      7. 6.3.7  Undervoltage Lockout
      8. 6.3.8  Overvoltage Protection
      9. 6.3.9  Overcurrent Protection
      10. 6.3.10 Thermal Shutdown
    4. 6.4 Device Functional Modes
      1. 6.4.1 One-Wire Digital Interface (EasyScale Interface)
      2. 6.4.2 PWM Control Interface
    5. 6.5 Programming
      1. 6.5.1 EasyScale Programming
  8. 7 Application and Implementation
    1. 7.1 Application Information
    2. 7.2 Typical Application
      1. 7.2.1 Design Requirements
      2. 7.2.2 Detailed Design Procedure
        1. 7.2.2.1 Inductor Selection
        2. 7.2.2.2 Schottky Diode Selection
        3. 7.2.2.3 Compensation Capacitor Selection
        4. 7.2.2.4 Output Capacitor Selection
      3. 7.2.3 Application Curves
      4. 7.2.4 Additional Application Circuits
    3. 7.3 Power Supply Recommendations
    4. 7.4 Layout
      1. 7.4.1 Layout Guidelines
      2. 7.4.2 Layout Example
  9. 8 Device and Documentation Support
    1. 8.1 Device Support
    2. 8.2 Related Links
    3. 8.3 Community Resources
    4. 8.4 Trademarks
  10. 9 Revision History
  11. 10Mechanical, Packaging, and Orderable Information

6.1 Overview

The TPS61162A, TPS61163A is a high-efficiency, dual-channel white LED driver for smart-phone backlighting applications. Two current sink regulators of high current-matching capability are integrated in the TPS61162A,TPS61163A to support dual LED strings connection and to improve the current balance and protect the LED diodes when either LED string is open or short.

The TPS61162A, TPS61163A has integrated all of the key function blocks to power and control up to 20 white LED diodes. It includes a 1.5A, 40V boost converter, two current-sink regulators, and protection circuit for overcurrent, overvoltage, and thermal shutdown protection.

In order to provide high brightness backlighting for large size or high resolution smart phone panels, more and more white LED diodes are used. Having all LED diodes in a string improves overall current matching; however, the output voltage of a boost converter will be limited when input voltage is low, and normally the efficiency will drop when output voltage goes very high. Thus, the LED diodes are arranged in two parallel strings.