SLVSD68 December   2015 TPS92691 , TPS92691-Q1

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  Internal Regulator and Undervoltage Lockout (UVLO)
      2. 7.3.2  Oscillator
      3. 7.3.3  Gate Driver
      4. 7.3.4  Rail-to-Rail Current Sense Amplifier
      5. 7.3.5  Transconductance Error Amplifier
      6. 7.3.6  Switch Current Sense and Internal Slope Compensation
      7. 7.3.7  Analog Adjust Input
      8. 7.3.8  PWM Input and Series Dimming FET Gate Driver Output
      9. 7.3.9  Soft-Start
      10. 7.3.10 Current Monitor Output
      11. 7.3.11 Overvoltage Protection
      12. 7.3.12 Thermal Protection
    4. 7.4 Device Functional Modes
  8. 8 Application and Implementation
    1. 8.1 Application Information
      1. 8.1.1  Duty Cycle Considerations
      2. 8.1.2  Inductor Selection
      3. 8.1.3  Output Capacitor Selection
      4. 8.1.4  Input Capacitor Selection
      5. 8.1.5  Main Power MOSFET Selection
      6. 8.1.6  Rectifier Diode Selection
      7. 8.1.7  LED Current Programming
      8. 8.1.8  Switch Current Sense Resistor and Slope Compensation
      9. 8.1.9  Feedback Compensation
      10. 8.1.10 Soft-Start
      11. 8.1.11 Overvoltage Protection
      12. 8.1.12 PWM Dimming Considerations
    2. 8.2 Typical Applications
      1. 8.2.1 Typical Boost LED Driver
        1. 8.2.1.1 Design Requirements
        2. 8.2.1.2 Detailed Design Procedure
          1. 8.2.1.2.1  Calculating Duty Cycle
          2. 8.2.1.2.2  Setting Switching Frequency
          3. 8.2.1.2.3  Inductor Selection
          4. 8.2.1.2.4  Output Capacitor Selection
          5. 8.2.1.2.5  Input Capacitor Selection
          6. 8.2.1.2.6  Main N-Channel MOSFET Selection
          7. 8.2.1.2.7  Rectifying Diode Selection
          8. 8.2.1.2.8  Programming LED Current
          9. 8.2.1.2.9  Setting Switch Current Limit and Slope Compensation
          10. 8.2.1.2.10 Deriving Compensator Parameters
          11. 8.2.1.2.11 Setting Start-up Duration
          12. 8.2.1.2.12 Setting Overvoltage Protection Threshold
          13. 8.2.1.2.13 PWM Dimming Considerations
        3. 8.2.1.3 Application Curves
      2. 8.2.2 Typical Buck-Boost LED Driver
        1. 8.2.2.1 Design Requirements
        2. 8.2.2.2 Detailed Design Procedure
          1. 8.2.2.2.1  Calculating Duty Cycle
          2. 8.2.2.2.2  Setting Switching Frequency
          3. 8.2.2.2.3  Inductor Selection
          4. 8.2.2.2.4  Output Capacitor Selection
          5. 8.2.2.2.5  Input Capacitor Selection
          6. 8.2.2.2.6  Main N-Channel MOSFET Selection
          7. 8.2.2.2.7  Rectifier Diode Selection
          8. 8.2.2.2.8  Setting Switch Current Limit and Slope Compensation
          9. 8.2.2.2.9  Programming LED Current
          10. 8.2.2.2.10 Deriving Compensator Parameters
          11. 8.2.2.2.11 Setting Startup Duration
          12. 8.2.2.2.12 Setting Overvoltage Protection Threshold
          13. 8.2.2.2.13 PWM Dimming Consideration
        3. 8.2.2.3 Application Curves
  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 Related Links
    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

9 Power Supply Recommendations

This device is designed to operate from an input voltage supply range between 4.5 V and 65 V. The input could be a car battery or another preregulated power supply. If the input supply is located more than a few inches from the TPS92691/-Q1 device, additional bulk capacitance or an input filter may be required in addition to the ceramic bypass capacitors to address noise and EMI concerns.