SLVS413K October   2002  – July 2022 TPS61040 , TPS61041

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
    6. 6.6 Typical Characteristics
  7. 7 Detailed Description
    1. 7.1 Overview
    2. 7.2 Functional Block Diagram
    3. 7.3 Feature Description
      1. 7.3.1 Peak Current Control
      2. 7.3.2 Soft Start
      3. 7.3.3 Enable
      4. 7.3.4 Undervoltage Lockout
      5. 7.3.5 Thermal Shutdown
    4. 7.4 Device Functional Modes
      1. 7.4.1 Operation
  8. 8 Application and Implementation
    1. 8.1 Application Information
    2. 8.2 Typical Application
      1. 8.2.1 Design Requirements
      2. 8.2.2 Detailed Design Procedure
        1. 8.2.2.1 Inductor Selection, Maximum Load Current
        2. 8.2.2.2 Setting the Output Voltage
        3. 8.2.2.3 Line and Load Regulation
        4. 8.2.2.4 Output Capacitor Selection
        5. 8.2.2.5 Input Capacitor Selection
        6. 8.2.2.6 Diode Selection
      3. 8.2.3 Application Curves
    3. 8.3 System Examples
  9. 9 Power Supply Recommendations
  10. 10Layout
    1. 10.1 Layout Guidelines
    2. 10.2 Layout Example
  11. 11Device and Documentation Support
    1. 11.1 Third-Party Products Disclaimer
    2. 11.2 Support Resources
    3. 11.3 Trademarks
    4. 11.4 Electrostatic Discharge Caution
    5. 11.5 Glossary
  12. 12Mechanical, Packaging, and Orderable Information

8.3 System Examples

GUID-92CC1A14-D956-4D30-8AFE-7103E7E22578-low.gifFigure 8-5 LCD Bias Supply With Adjustable Output Voltage
GUID-E2C7B65F-B6E7-40B4-9126-D3E235A2A4E9-low.gifFigure 8-6 LCD Bias Supply With Load Disconnect
GUID-00491FB8-0815-4230-ACCE-5298F70148BF-low.gif Figure 8-7 Positive and Negative Output LCD Bias Supply
GUID-BC5B96A2-32EC-4932-8AE4-D9CE2ED884FD-low.gifFigure 8-8 Standard 3.3-V to 12-V Supply
GUID-E122F819-E860-442A-B960-D46187AA28D2-low.gifFigure 8-9 Dual Battery Cell to 5-V/50-mA Conversion Efficiency Approximately Equals 84% at VIN = 2.4 V to Vo = 5 V/45 mA
GUID-18382825-631D-487C-95CA-89387EF0FD86-low.gifFigure 8-10 White LED Supply With Adjustable Brightness Control Using a PWM Signal on the Enable Pin, Efficiency Approximately Equals 86% at VIN = 3 V, ILED = 15 mA
GUID-277F0AB1-2C9E-4E8A-B3C5-92903F95B8EC-low.gif
A. A smaller output capacitor value for C2 causes a larger LED ripple.
Figure 8-11 White LED Supply With Adjustable Brightness Control Using an Analog Signal on the Feedback Pin