ZHCSAO9A December   2012  – September 2015 TPS92690

PRODUCTION DATA.  

1. 1 特性
2. 2 应用
3. 3 说明
4. 4 修订历史记录
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  Current Regulators
      2. 7.3.2  Peak Current Mode Control
      3. 7.3.3  Switching Frequency and Synchronization
      4. 7.3.4  Current Sense and Current Limit
      5. 7.3.5  Average LED Current
      6. 7.3.6  Precision Reference (VREF)
      7. 7.3.7  Low-Level Analog Dimming
      8. 7.3.8  Soft-Start and Shutdown
      9. 7.3.9  VCC Regulator and Start-Up
      10. 7.3.10 Overvoltage Protection (OVP)
      11. 7.3.11 Input Undervoltage Lockout (UVLO)
      12. 7.3.12 PWM Dimming
      13. 7.3.13 Control Loop Compensation
      14. 7.3.14 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 Capacitor
      5. 8.1.5 MOSFET Selection
      6. 8.1.6 Recirculating Diode
   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  Inductor Ripple Current
            5. 8.2.1.2.5  Output Capacitance
            6. 8.2.1.2.6  Peak Current Limit
            7. 8.2.1.2.7  Loop Compensation
            8. 8.2.1.2.8  Input Capacitance
            9. 8.2.1.2.9  NFET
            10. 8.2.1.2.10 Diode
            11. 8.2.1.2.11 Input UVLO
            12. 8.2.1.2.12 Output OVLO
         3. 8.2.1.3 Application Curve
      2. 8.2.2 Simplified 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  Inductor Ripple Current
               1. 8.2.2.2.4.1 Minimum Inductor Value
               2. 8.2.2.2.4.2 Inductor Ripple Current
               3. 8.2.2.2.4.3 RMS Inductor Current
            5. 8.2.2.2.5  LED Ripple Current
               1. 8.2.2.2.5.1 Output Capacitor
               2. 8.2.2.2.5.2 Output Capacitor RMS Current
            6. 8.2.2.2.6  Peak Current Limit
            7. 8.2.2.2.7  Loop Compensation
               1. 8.2.2.2.7.1 Compensation Capacitor
               2. 8.2.2.2.7.2 RHP Zero
               3. 8.2.2.2.7.3 Output Capacitor Pole
            8. 8.2.2.2.8  Input Capacitance
            9. 8.2.2.2.9  NFET
               1. 8.2.2.2.9.1 Maximum Average NFET Current
               2. 8.2.2.2.9.2 RMS Transistor Current
            10. 8.2.2.2.10 Diode
                1. 8.2.2.2.10.1 Maximum Average Diode Current
            11. 8.2.2.2.11 Output OVLO
            12. 8.2.2.2.12 Input UVLO
            13. 8.2.2.2.13 Soft-Start
            14. 8.2.2.2.14 PWM Dimming Method
            15. 8.2.2.2.15 Analog Dimming Method
9. 9 Power Supply Recommendations
   1. 9.1 Bench Supply Current Limit
10. 10Layout
    1. 10.1 Layout Guidelines
    2. 10.2 Layout Example
11. 11器件和文档支持
    1. 11.1 社区资源
    2. 11.2 商标
    3. 11.3 静电放电警告
    4. 11.4 Glossary
12. 12机械、封装和可订购信息