SNVS834 August   2014 LM3631

PRODUCTION DATA.  

  1. 1 Features
  2. 2 Applications
  3. 3 Description
  4. 4 Revision History
  5. 5 Device Comparison Table
  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 I2C Timing Requirements (SDA, SCL)
    7. 7.7 Typical Characteristics
  8. 8 Detailed Description
    1. 8.1 Overview
    2. 8.2 Functional Block Diagram
    3. 8.3 Features Description
      1. 8.3.1  Backlight
        1. 8.3.1.1 Backlight Brightness Control
          1. 8.3.1.1.1 LED Current With Brightness Selection '00'
          2. 8.3.1.1.2 LED Current With Brightness Selection '01'
          3. 8.3.1.1.3 LED Current With Brightness Selections '10' and '11'
        2. 8.3.1.2 Linear Slope and Advanced Slope
        3. 8.3.1.3 Mapper
        4. 8.3.1.4 PWM Detector and PWM Input
      2. 8.3.2  Backlight Boost Converter
        1. 8.3.2.1 Headroom Voltage
        2. 8.3.2.2 Automatic Switching Frequency Shift
        3. 8.3.2.3 Inductor Select Bit
        4. 8.3.2.4 PI-Compensator
      3. 8.3.3  Backlight Protection and Faults
        1. 8.3.3.1 Overvoltage Protection (OVP) and Open-Load Fault Protection
        2. 8.3.3.2 Overcurrent Protection (OCP) and Overcurrent Protection Fault
          1. 8.3.3.2.1 Overcurrent Protection Fault Flag (BL_OCPFLT)
          2. 8.3.3.2.2 Short Circuit Fault Flag (BL_SCFLT)
      4. 8.3.4  LCD Bias
        1. 8.3.4.1 Display Bias Power (VPOS, VNEG, VOREF)
        2. 8.3.4.2 Display Bias Power Sequencing (VPOS, VNEG, VOREF, VCONT)
          1. 8.3.4.2.1 Start-Up and Shutdown Delays
          2. 8.3.4.2.2 Special Conditions During Display Bias Power Sequencing
        3. 8.3.4.3 Active Discharge
        4. 8.3.4.4 LCD Bias Protection
      5. 8.3.5  Display Controller Power (VLDO_CONT)
      6. 8.3.6  RESET Register
      7. 8.3.7  nRST Input
      8. 8.3.8  FLAG Pin
      9. 8.3.9  Power-Good Flag
      10. 8.3.10 OTP_SEL Pin
      11. 8.3.11 Thermal Shutdown
      12. 8.3.12 Undervoltage Lockout
    4. 8.4 Device Functional Modes
      1. 8.4.1 Modes of Operation
    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. 8.6 Register Maps
  9. 9 Application and Implementation
    1. 9.1 Application Information
    2. 9.2 Typical Application
      1. 9.2.1 Design Requirements
      2. 9.2.2 Detailed Design Procedure
        1. 9.2.2.1 External Components
        2. 9.2.2.2 Inductor Selection
        3. 9.2.2.3 Boost Output Capacitor Selection
        4. 9.2.2.4 Backlight Boost Diode Selection
        5. 9.2.2.5 Charge Pump Capacitor Selection
        6. 9.2.2.6 LDO Output Capacitor Selection
      3. 9.2.3 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 Device Support
      1. 12.1.1 Third-Party Products Disclaimer
    2. 12.2 Trademarks
    3. 12.3 Electrostatic Discharge Caution
    4. 12.4 Glossary
  13. 13Mechanical, Packaging, and Orderable Information

Package Options

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

5 Device Comparison Table

Table 1. Register Default Values

I2C Address Register Read/Write OTP_SEL Low OTP_SEL High
0x00 Device Control R/W 0x01 0x01
0x01 LED Brightness LSB R/W 0x00 0x00
0x02 LED Brightness MSB R/W 0x00 0x00
0x03 Faults R/W 0x00 0x00
0x04 Faults and Power-Good R/W 0x00 0x00
0x05 Backlight Configuration 1 R/W 0xCF 0xCF
0x06 Backlight Configuration 2 R/W 0x07 0x27
0x07 Backlight Configuration 3 R/W 0xC7 0xC6
0x08 Backlight Configuration 4 R/W 0x49 0x49
0x09 Backlight Configuration 5 R/W 0x03 0x03
0x0A LCD_Configuration 1 R/W 0x1E 0x1E
0x0B LCD_Configuration 2 R/W 0x01 0x14
0x0C LCD_Configuration 3 R/W 0xDC 0x1A
0x0D LCD_Configuration 4 R/W 0x20 0x1E
0x0E LCD_Configuration 5 R/W 0x20 0x1E
0x0F LCD_Configuration 6 R/W 0x1E 0x1E
0x10 LCD_Configuration 7 R/W 0x05 0x0F
0x11 LCD_Configuration 8 R/W 0x50 0x60
0x12 LCD_Configuration 9 R/W 0x00 0x00
0x13 FLAG Configuration R/W 0x09 0x09
0x16 Revision (6 LSB bits only) R 0x01 0x01

Values in bold are OTP configurable.