SNOSCR5D March   2013  – December 2016 LP55231

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  Charge Pump Electrical Characteristics
    7. 6.7  LED Driver Electrical Characteristics
    8. 6.8  LED Test Electrical Characteristics
    9. 6.9  Logic Interface Characteristics
    10. 6.10 Recommended External Clock Source Conditions
    11. 6.11 Serial Bus Timing Parameters (SDA, SCL)
    12. 6.12 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 Programming
      2. 7.3.2 LED Error Detection
      3. 7.3.3 Energy Efficiency
      4. 7.3.4 Temperature Compensation
      5. 7.3.5 Charge Pump Operational Description
        1. 7.3.5.1 Overview
        2. 7.3.5.2 Output Resistance
        3. 7.3.5.3 Controlling The Charge Pump
        4. 7.3.5.4 LED Forward Voltage Monitoring
        5. 7.3.5.5 Gain Change Hysteresis
      6. 7.3.6 LED Driver Operational Description
        1. 7.3.6.1 Overview
        2. 7.3.6.2 Powering LEDs
        3. 7.3.6.3 Controlling The High-Side LED Drivers
      7. 7.3.7 Automatic Power-Save Mode
      8. 7.3.8 PWM Power-Save Mode
    4. 7.4 Device Functional Modes
      1. 7.4.1 Modes Of Operation
    5. 7.5 Programming
      1. 7.5.1 I2C-Compatible Control Interface
        1. 7.5.1.1 Data Validity
        2. 7.5.1.2 Start And Stop Conditions
        3. 7.5.1.3 Transferring Data
      2. 7.5.2 I2C-Compatible Chip Address
        1. 7.5.2.1 Control Register Write Cycle
        2. 7.5.2.2 Control Register Read Cycle
        3. 7.5.2.3 Auto-Increment Feature
    6. 7.6 Register Maps
      1. 7.6.1 Register Set
      2. 7.6.2 Control Register Details
      3. 7.6.3 Instruction Set
      4. 7.6.4 LED Driver Instructions
        1. 7.6.4.1 Ramp
        2. 7.6.4.2 Ramp Instruction Application Example
        3. 7.6.4.3 Set_PWM
        4. 7.6.4.4 Wait
      5. 7.6.5 LED Mapping Instructions
        1. 7.6.5.1  MUX_LD_START; MUX_LD_END
        2. 7.6.5.2  MUX_MAP_START
        3. 7.6.5.3  MUX_SEL
        4. 7.6.5.4  MUX_CLR
        5. 7.6.5.5  MUX_MAP_NEXT
        6. 7.6.5.6  MUX_LD_NEXT
        7. 7.6.5.7  MUX_MAP_PREV
        8. 7.6.5.8  MUX_LD_PREV
        9. 7.6.5.9  MUX_MAP_ADDR
        10. 7.6.5.10 MUX_LD_ADDR
      6. 7.6.6 Branch Instructions
        1. 7.6.6.1 BRANCH
        2. 7.6.6.2 INT
        3. 7.6.6.3 RST
        4. 7.6.6.4 END
        5. 7.6.6.5 TRIGGER
      7. 7.6.7 Arithmetic Instructions
        1. 7.6.7.1 LD
        2. 7.6.7.2 ADD
        3. 7.6.7.3 SUB
  8. 8 Application and Implementation
    1. 8.1 Application Information
    2. 8.2 Typical Applications
      1. 8.2.1 Using Two LP55231 in the Same Application
        1. 8.2.1.1 Design Requirements
        2. 8.2.1.2 Detailed Design Procedure
        3. 8.2.1.3 Application Curves
      2. 8.2.2 Driving Haptic Feedback with LP55231
        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 Trademarks
    3. 11.3 Receiving Notification of Documentation Updates
    4. 11.4 Community Resources
    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 from an input voltage supply range between 2.7 V and 5.5 V. In a 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 should be low enough that the input current transient does not cause drop below a 2.7-V level in the LP55231 supply voltage.