SNVS603D August   2009  – July 2019 LM3424

PRODUCTION DATA.  

1. 1 Features
2. 2 Applications
   1.     Typical Boost Application Circuit
3. 3 Description
4. 4 Revision History
5. 5 Pin Configuration and Functions
   1.     Pin 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  Current Regulators
      2. 7.3.2  Peak Current Mode Control
      3. 7.3.3  Average LED Current
      4. 7.3.4  Thermal Foldback and Analog Dimming
      5. 7.3.5  Current Sense and Current Limit
      6. 7.3.6  Slope Compensation
      7. 7.3.7  Control Loop Compensation
      8. 7.3.8  Start-Up Regulator and Soft-Start
      9. 7.3.9  Overvoltage Lockout (OVLO)
      10. 7.3.10 Input Undervoltage Lockout (UVLO)
          1. 7.3.10.1 UVLO Only
          2. 7.3.10.2 PWM Dimming and UVLO
      11. 7.3.11 PWM Dimming
      12. 7.3.12 Thermal Shutdown
   4. 7.4 Device Functional Modes
8. 8 Application and Implementation
   1. 8.1 Application Information
      1. 8.1.1 Inductor
      2. 8.1.2 LED Dynamic Resistance
      3. 8.1.3 Output Capacitor
      4. 8.1.4 Input Capacitors
      5. 8.1.5 Main MOSFET and Dimming MOSFET
      6. 8.1.6 Re-Circulating Diode
      7. 8.1.7 Switching Frequency
   2. 8.2 Typical Applications
      1. 8.2.1 Basic Topology Schematics
         1. 8.2.1.1 Design Requirements
         2. 8.2.1.2 Detailed Design Procedure
            1. 8.2.1.2.1  Operating Point
            2. 8.2.1.2.2  Switching Frequency
            3. 8.2.1.2.3  Average LED Current
            4. 8.2.1.2.4  Thermal Foldback
            5. 8.2.1.2.5  Inductor Ripple Current
            6. 8.2.1.2.6  LED Ripple Current
            7. 8.2.1.2.7  Peak Current Limit
            8. 8.2.1.2.8  Slope Compensation
            9. 8.2.1.2.9  Loop Compensation
            10. 8.2.1.2.10 Input Capacitance
            11. 8.2.1.2.11 NFET
            12. 8.2.1.2.12 Diode
            13. 8.2.1.2.13 Output OVLO
            14. 8.2.1.2.14 Input UVLO
            15. 8.2.1.2.15 Soft-Start
            16. 8.2.1.2.16 PWM Dimming Method
            17. 8.2.1.2.17 Analog Dimming Method
      2. 8.2.2 Buck-Boost Application
         1. 8.2.2.1 Design Requirements
         2. 8.2.2.2 Detailed Design Procedure
            1. 8.2.2.2.1  Operating Point
            2. 8.2.2.2.2  Switching Frequency
            3. 8.2.2.2.3  Average LED Current
            4. 8.2.2.2.4  Thermal Foldback
            5. 8.2.2.2.5  Inductor Ripple Current
            6. 8.2.2.2.6  Output Capacitance
            7. 8.2.2.2.7  Peak Current Limit
            8. 8.2.2.2.8  Slope Compensation
            9. 8.2.2.2.9  Loop Compensation
            10. 8.2.2.2.10 Input Capacitance
            11. 8.2.2.2.11 NFET
            12. 8.2.2.2.12 Diode
            13. 8.2.2.2.13 Input UVLO
            14. 8.2.2.2.14 Output OVLO
            15. 8.2.2.2.15 Soft-Start
         3. 8.2.2.3 Application Curve
      3. 8.2.3 Boost Application
         1. 8.2.3.1 Design Requirements
         2. 8.2.3.2 Detailed Design Procedure
      4. 8.2.4 Buck-Boost Application
         1. 8.2.4.1 Design Requirements
         2. 8.2.4.2 Detailed Design Procedures
      5. 8.2.5 Boost Application
         1. 8.2.5.1 Design Requirements
         2. 8.2.5.2 Detailed Design Procedure
      6. 8.2.6 Buck-Boost Application
         1. 8.2.6.1 Design Requirements
         2. 8.2.6.2 Detailed Design Procedure
      7. 8.2.7 Buck Application
         1. 8.2.7.1 Design Requirements
         2. 8.2.7.2 Detailed Design Procedure
      8. 8.2.8 Buck-Boost Application
         1. 8.2.8.1 Design Requirements
         2. 8.2.8.2 Detailed Design Procedure
      9. 8.2.9 SEPIC Application
         1. 8.2.9.1 Design Requirements
         2. 8.2.9.2 Detailed Design Procedure
9. 9 Power Supply Recommendations
   1. 9.1 Input Supply Current Limit
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