SNVSA40B October   2014  – June 2024 TPS61169

PRODUCTION DATA  

  1.   1
  2. 1 Features
  3. 2 Applications
  4. 3 Description
  5. 4 Pin Configuration and 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 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 Soft Start-Up
      2. 6.3.2 Open LED Protection
      3. 6.3.3 Shutdown
      4. 6.3.4 Current Program
      5. 6.3.5 LED Brightness Dimming
      6. 6.3.6 Undervoltage Lockout
      7. 6.3.7 Thermal Foldback and Thermal Shutdown
    4. 6.4 Device Functional Modes
      1. 6.4.1 Operation With CTRL
  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 Output Capacitor Selection
        4. 7.2.2.4 LED Current Set Resistor
        5. 7.2.2.5 Thermal Considerations
    3. 7.3 Application Curves
    4. 7.4 Power Supply Recommendations
    5. 7.5 Layout
      1. 7.5.1 Layout Guidelines
      2. 7.5.2 Layout Example
  9. 8 Device and Documentation Support
    1. 8.1 Device Support
    2. 8.2 Receiving Notification of Documentation Updates
    3. 8.3 Support Resources
    4. 8.4 Trademarks
    5. 8.5 Electrostatic Discharge Caution
    6. 8.6 Glossary
  10. 9 Revision History
  11. 10Mechanical, Packaging, and Orderable Information

Package Options

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

3 Description

With a 40V rated integrated switch FET, the TPS61169 is a boost converter that drives LEDs in series. The boost converter has a 40V, 1.8A internal MOSFET with minimum 1.2A current limit; thus it can drive single or parallel LED strings for small- to large-size panel backlighting. The default white LED current is set with the external sensor resistor, RSET, and the feedback voltage is regulated to 204mV, as shown in the Simplified Schematic. During the operation, the LED current can be controlled by using a pulse width modulation (PWM) signal applied to the CTRL pin, through which the duty cycle determines the feedback reference voltage. The TPS61169 does not burst the LED current; therefore, it does not generate audible noises on the output capacitor. For maximum protection, the device features integrated open LED protection that disables the TPS61169 to prevent the output voltage from exceeding the absolute maximum voltage ratings of the device during open LED conditions.

The TPS61169 is available in a space-saving 5-pin SC70 package.

Device Information(1)
PART NUMBER PACKAGE BODY SIZE (NOM)
TPS61169 SOT (5) 2.00mm × 1.25mm
(1) For all available packages, see the orderable addendum at the end of the data sheet.
TPS61169 Simplified Schematic Simplified Schematic