SNVS440B May   2007  – March 2016 LP5520

PRODUCTION DATA.  

  1. 1 Features
  2. 2 Applications
  3. 3 Description
  4. 4 Revision History
  5. 5 Pin Configuration and Function
  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  RGB Driver Electrical Characteristics (ROUT, GOUT, BOUT Outputs)
    7. 6.7  Logic Interface Characteristics
    8. 6.8  Magnetic Boost DC-DC Converter Electrical Characteristics
    9. 6.9  I2C Timing Parameters
    10. 6.10 SPI Timing Requirements
    11. 6.11 Typical Characteristics
      1. 6.11.1 RGB Driver Typical Characteristics
      2. 6.11.2 Boost Converter 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 Start-Up Powering
      2. 7.3.2 RGB Driver Functionality
        1. 7.3.2.1 White Balance Control
        2. 7.3.2.2 LED Brightness Control
        3. 7.3.2.3 LED PWM Control
        4. 7.3.2.4 Sequential Mode
        5. 7.3.2.5 Current Control of the LEDs
        6. 7.3.2.6 Output Enables
        7. 7.3.2.7 Fade In and Fade Out
        8. 7.3.2.8 Temperature and Light Measurement
      3. 7.3.3 Magnetic High-Voltage Boost DC-DC Converter
        1. 7.3.3.1 Boost Control
        2. 7.3.3.2 Adaptive Output Voltage Control
    4. 7.4 Device Functional Modes
      1. 7.4.1 Manual Mode
      2. 7.4.2 Automatic Mode
      3. 7.4.3 Stand-Alone Mode
      4. 7.4.4 Start-Up Sequence
    5. 7.5 Programming
      1. 7.5.1 Control Interface
        1. 7.5.1.1 I2C Compatible Interface
          1. 7.5.1.1.1 I2C Signals
          2. 7.5.1.1.2 I2C Data Validity
          3. 7.5.1.1.3 I2C Start and Stop Conditions
          4. 7.5.1.1.4 Transferring Data
        2. 7.5.1.2 SPI Interface
          1. 7.5.1.2.1 SPI Incremental Addressing
      2. 7.5.2 EEPROM Memory
    6. 7.6 Register Maps
      1. 7.6.1 LP5520 Registers, Control Bits, and Default Values
        1. 7.6.1.1 Register Bit Conventions
  8. 8 Application and Implementation
    1. 8.1 Application Information
    2. 8.2 Typical Applications
      1. 8.2.1 Typical Application: I2C-Bus Control
        1. 8.2.1.1 Design Requirements
        2. 8.2.1.2 Detailed Design Procedure
          1. 8.2.1.2.1 Recommended External Components
            1. 8.2.1.2.1.1 Output Capacitor: COUT
            2. 8.2.1.2.1.2 Input Capacitor: CIN
            3. 8.2.1.2.1.3 Output Diode: DOUT
            4. 8.2.1.2.1.4 EMI Filter Components: CSW, RSW, LSW And CHF
            5. 8.2.1.2.1.5 Inductor: L1
            6. 8.2.1.2.1.6 List Of Recommended External Components
        3. 8.2.1.3 Application Curves
      2. 8.2.2 Stand-Alone Typical Application
        1. 8.2.2.1 Design Requirements
        2. 8.2.2.2 Detailed Design Procedure
        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 Device Support
      1. 11.1.1 Third-Party Products Disclaimer
    2. 11.2 Documentation Support
      1. 11.2.1 Related Documentation
    3. 11.3 Community Resources
    4. 11.4 Trademarks
    5. 11.5 Electrostatic Discharge Caution
    6. 11.6 Glossary
  12. 12Mechanical, Packaging, and Orderable Information

Package Options

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

9 Power Supply Recommendations

The device is designed to operate with an input voltage supply range from 2.9 V to 5.5 V. In typical application this is from single Li-ion battery cell. This input supply must be well regulated and able to withstand maximum input current and maintain stable voltage without voltage drop even at load transition condition (start-up or rapid brightness change). The resistance of the input supply rail must be low enough that the input current transient does not cause a drop below the 2.9-V level in the LP5520 supply voltage.