SLVSBR3A May   2013  – June 2015 TPS61158

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 EasyScale Timing Requirements
    7. 6.7 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 Soft Start-Up
      2. 7.3.2 Shutdown
      3. 7.3.3 Current Program
      4. 7.3.4 Undervoltage Lockout
      5. 7.3.5 Open LED Protection
      6. 7.3.6 Thermal Shutdown
    4. 7.4 Device Functional Modes
      1. 7.4.1 LED Brightness Dimming Mode Selection
        1. 7.4.1.1 PWM Brightness Dimming
          1. 7.4.1.1.1 Digital 1-Wire Brightness Dimming
          2. 7.4.1.1.2 Easyscale: 1-Wire Digital Dimming
  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
        2. 8.2.2.2 Maximum Output Current
        3. 8.2.2.3 Input and Output Capacitor Selection
      3. 8.2.3 Application Curves
      4. 8.2.4 Additional Application Circuits
        1. 8.2.4.1 TPS61158 To Drive Up To 8 LEDs
        2. 8.2.4.2 TPS61158 to Drive up to 8 LEDs with RC Filter at VIN Pin
  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 Device Support
      1. 11.1.1 Third-Party Products Disclaimer
    2. 11.2 Community Resources
    3. 11.3 Trademarks
    4. 11.4 Electrostatic Discharge Caution
    5. 11.5 Glossary
  12. 12Mechanical, Packaging, and Orderable Information

Package Options

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

1 Features

  • 2.7-V to 5.5-V Input Voltage Range
  • 28-V Open LED Protection (up to 8 LEDs)
  • Integrated 0.6-A, 30-V Internal Switch FET and Power Diode
  • 750-kHz Switching Frequency
  • Flexible Digital and PWM Brightness Control
    • 1-Wire Control Interface (EasyScale™)
    • PWM Dimming Control Interface
  • Up to 100:1 PWM Dimming Ratio
  • Integrated Loop Compensation
  • Built-in Soft Start
  • Built-in WLED Open protection
  • Thermal Shutdown

2 Applications

  • Feature Phones
  • Smart Phones
  • Portable Media Players
  • Ultra Mobile Devices
  • GPS Receivers
  • Backlight for Small and Media Form Factor LCD Displays

3 Description

With a 30V-rated integrated switch FET and power diode, the TPS61158 is a boost converter that drives LEDs in series. The boost converter runs at 750-kHz fixed switching frequency to reduce output ripple, improve conversion efficiency, and allows for the use of small external components.

The default white LED current is set with the external sensor resistor RFB, and the feedback voltage is regulated to 200 mV, as shown in Typical Application. During the operation, the LED current can be controlled using the 1-wire digital interface (EasyScale™ protocol) through the CTRL pin. Alternatively, a pulse width modulation (PWM) signal can be applied to the CTRL pin through which the duty cycle determines the feedback reference voltage. In either digital or PWM mode, the TPS61158 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 TPS61158 to prevent the output voltage from exceeding the device absolute maximum voltage ratings during open LED conditions.

Device Information(1)

PART NUMBER PACKAGE BODY SIZE (NOM)
TPS61158 WSON (6) 2.00 mm x 2.00 mm
  1. For all available packages, see the orderable addendum at the end of the data sheet.

space

Typical Application

TPS61158 fp_typ_app_lvsbr3.gif