SNVS693E September   2011  – September 2014 LP8552

PRODUCTION DATA.  

  1. 1 Features
  2. 2 Applications
  3. 3 Description
  4. 4 Revision History
  5. 5 Default EEPROM Values
  6. 6 Pin Configuration and Functions
  7. 7 Specifications
    1. 7.1  Absolute Maximum Ratings
    2. 7.2  Handling Ratings
    3. 7.3  Recommended Operating Conditions
    4. 7.4  Thermal Information
    5. 7.5  Electrical Characteristics
    6. 7.6  Boost Converter Electrical Characteristics
    7. 7.7  LED Driver Electrical Characteristics
    8. 7.8  PWM Interface Characteristics
    9. 7.9  Undervoltage Protection
    10. 7.10 Logic Interface Characteristics
    11. 7.11 I2C Serial Bus Timing Parameters (SDA, SCLK)
    12. 7.12 Typical Characteristics
  8. 8 Detailed Description
    1. 8.1 Overview
    2. 8.2 Functional Block Diagram
    3. 8.3 Feature Description
      1. 8.3.1 Clock Generation
      2. 8.3.2 Brightness Control Methods
        1. 8.3.2.1  PWM Input Duty Cycle
        2. 8.3.2.2  Brightness Register Control
        3. 8.3.2.3  PWM Direct Control
        4. 8.3.2.4  PWM Calculation Data Flow
        5. 8.3.2.5  PWM Detector
        6. 8.3.2.6  Brightness Control
        7. 8.3.2.7  Resolution Selector
        8. 8.3.2.8  Sloper
        9. 8.3.2.9  PWM & Current Control
        10. 8.3.2.10 Dither
        11. 8.3.2.11 PWM Comparator
        12. 8.3.2.12 Current Setting
        13. 8.3.2.13 PWM Frequency Setting
        14. 8.3.2.14 Phase Shift PWM Scheme
        15. 8.3.2.15 Slope And Dithering
        16. 8.3.2.16 Driver Headroom Control
      3. 8.3.3 Boost Converter
        1. 8.3.3.1 Operation
        2. 8.3.3.2 Protection
        3. 8.3.3.3 Manual Output Voltage Control
        4. 8.3.3.4 Adaptive Boost Control
      4. 8.3.4 Fault Detection
        1. 8.3.4.1 LED Fault Detection
        2. 8.3.4.2 Undervoltage Detection
        3. 8.3.4.3 Overcurrent Protection
        4. 8.3.4.4 Device Thermal Regulation
        5. 8.3.4.5 Thermal Shutdown
    4. 8.4 Device Functional Modes
    5. 8.5 Programming
      1. 8.5.1 I2C-Compatible Serial Bus Interface
        1. 8.5.1.1 Interface Bus Overview
        2. 8.5.1.2 Data Transactions
        3. 8.5.1.3 Acknowledge Cycle
        4. 8.5.1.4 “Acknowledge After Every Byte” Rule
        5. 8.5.1.5 Addressing Transfer Formats
        6. 8.5.1.6 Control Register Write Cycle
        7. 8.5.1.7 Control Register Read Cycle
      2. 8.5.2 EEPROM
    6. 8.6 Register Maps
      1. 8.6.1 Register Bit Explanations
        1. 8.6.1.1 Brightness Control
        2. 8.6.1.2 Device Control
        3. 8.6.1.3 Fault
        4. 8.6.1.4 Identification
        5. 8.6.1.5 Direct Control
        6. 8.6.1.6 Temp MSB
        7. 8.6.1.7 Temp LSB
        8. 8.6.1.8 EEPROM Control
      2. 8.6.2 EEPROM Bit Explanations
        1. 8.6.2.1 EEPROM Address 0
        2. 8.6.2.2 EEPROM Address 1
        3. 8.6.2.3 EEPROM Address 2
        4. 8.6.2.4 EEPROM Address 3
        5. 8.6.2.5 EEPROM Address 4
        6. 8.6.2.6 EEPROM Address 5
        7. 8.6.2.7 EEPROM Address 6
        8. 8.6.2.8 EEPROM Address 7
  9. 9 Application and Implementation
    1. 9.1 Application Information
    2. 9.2 Typical Applications
      1. 9.2.1 Typical Application Using Internal LDO
        1. 9.2.1.1 Design Requirements
        2. 9.2.1.2 Detailed Design Procedure
          1. 9.2.1.2.1 Inductor Selection
          2. 9.2.1.2.2 Output Capacitor
          3. 9.2.1.2.3 LDO Capacitor
          4. 9.2.1.2.4 Output Diode
          5. 9.2.1.2.5 Resistors for Setting the LED Current and PWM Frequency
          6. 9.2.1.2.6 Filter Component Values
        3. 9.2.1.3 Application Curves
      2. 9.2.2 Typical Application for Low Input Voltage
        1. 9.2.2.1 Design Requirements
        2. 9.2.2.2 Detailed Design Procedure
        3. 9.2.2.3 Application Curves
      3. 9.2.3 Typical Application for Three Channels and Low Input Voltage
        1. 9.2.3.1 Design Requirements
        2. 9.2.3.2 Detailed Design Procedure
        3. 9.2.3.3 Application Curves
  10. 10Power Supply Recommendations
  11. 11Layout
    1. 11.1 Layout Guidelines
    2. 11.2 Layout Example
  12. 12Device and Documentation Support
    1. 12.1 Trademarks
    2. 12.2 Electrostatic Discharge Caution
    3. 12.3 Glossary
  13. 13Mechanical, Packaging, and Orderable Information

封装选项

机械数据 (封装 | 引脚)
散热焊盘机械数据 (封装 | 引脚)
订购信息

5 Default EEPROM Values

ADDR LP8552 LP8552-E00 LP8552-E01 LP8552-E04 LP8552-E05 LP8552-E06
A0h 0111 1111 0111 1111 0110 0001 0111 1111 0110 0001 0111 1111
A1h 1111 0101 1011 0101 1010 1001 1111 0101 1010 1001 0111 0000
A2h 1011 1111 1011 1111 1011 1101 1011 1111 1001 1101 1001 1111
A3h 0111 1011 0111 1011 0111 1111 0111 1011 0111 1111 0111 1011
A4h 0010 1000 0010 1000 0010 1000 0010 1000 0010 1000 0010 1000
A5h 1100 1111 1100 1111 0110 1110 0100 0101 0110 1110 0100 0101
A6h 0110 0100 0110 0100 0110 0100 0110 0100 0110 0100 0110 0100
A7h 0010 1101 0010 1101 0010 1110 0010 1110 0010 1110 0010 1110