JAJSDP5D February   2016  – March 2018 LM36273

PRODUCTION DATA.  

  1. 特長
  2. アプリケーション
    1.     概略回路図
  3. 概要
    1.     バックライト効率、3P7S
  4. 改訂履歴
  5. Pin Configuration and Functions
    1.     Pin Functions
  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 I2C Timing Requirements (Fast Mode)
    7. 6.7 Typical Characteristics
  7. Detailed Description
    1. 7.1 Overview
    2. 7.2 Functional Block Diagram
    3. 7.3 Features Description
      1. 7.3.1 Enabling the LM36273
      2. 7.3.2 Backlight
        1. 7.3.2.1 Current Sink Enable
        2. 7.3.2.2 Brightness Mapping
          1. 7.3.2.2.1 Linear Mapping
          2. 7.3.2.2.2 Exponential Mapping
        3. 7.3.2.3 Backlight Brightness Control Modes
          1. 7.3.2.3.1 I2C Brightness Control (PWM Pin Disabled)
          2. 7.3.2.3.2 I2C × PWM Brightness Control (PWM Pin Enabled)
            1. 7.3.2.3.2.1 PWM Ramper
        4. 7.3.2.4 Boost Switching Frequency
          1. 7.3.2.4.1 Minimum Inductor Select
        5. 7.3.2.5 Boost Feedback Gain Select
        6. 7.3.2.6 Auto Switching Frequency
        7. 7.3.2.7 PWM Input
          1. 7.3.2.7.1 PWM Sample Frequency
            1. 7.3.2.7.1.1 PWM Resolution and Input Frequency Range
            2. 7.3.2.7.1.2 PWM Sample Rate and Efficiency
              1. 7.3.2.7.1.2.1 PWM Sample Rate Example
          2. 7.3.2.7.2 PWM Hysteresis
          3. 7.3.2.7.3 PWM Step Response
          4. 7.3.2.7.4 PWM Timeout
          5. 7.3.2.7.5 PWM-to-Digital Code Readback
        8. 7.3.2.8 Regulated Headroom Voltage
        9. 7.3.2.9 Backlight Fault Protection and Faults
          1. 7.3.2.9.1 Backlight Overvoltage Protection (OVP)
          2. 7.3.2.9.2 Backlight Overcurrent Protection (OCP)
      3. 7.3.3 LCM Bias
        1. 7.3.3.1 Display Bias Boost Converter (VVPOS, VVNEG)
        2. 7.3.3.2 Auto Sequence Mode
        3. 7.3.3.3 Wake-up Mode
          1. 7.3.3.3.1 Wake1 Mode
          2. 7.3.3.3.2 Wake2 Mode
        4. 7.3.3.4 Active Discharge
        5. 7.3.3.5 LCM Bias Protection and Faults
          1. 7.3.3.5.1 LCM Overvoltage (OVP) Protection
          2. 7.3.3.5.2 VPOS Short-Circuit Protection
          3. 7.3.3.5.3 VNEG Short-Circuit Protection
      4. 7.3.4 Software Reset
      5. 7.3.5 HWEN Input
      6. 7.3.6 Thermal Shutdown (TSD)
    4. 7.4 Device Functional Modes
      1. 7.4.1 Modes of Operation
    5. 7.5 Programming
      1. 7.5.1 I2C-Compatible Serial Bus Interface
        1. 7.5.1.1 Interface Bus Overview
        2. 7.5.1.2 Data Transactions
        3. 7.5.1.3 Acknowledge Cycle
        4. 7.5.1.4 Acknowledge After Every Byte Rule
        5. 7.5.1.5 Addressing Transfer Formats
        6. 7.5.1.6 Register Programming
    6. 7.6 Register Maps
      1. 7.6.1  Revision Register (Address = 0x01)[Reset = 0x01]
        1. Table 11. Revision Register Field Descriptions
      2. 7.6.2  Backlight Configuration1 Register (Address = 0x02)[Reset = 0x28]
        1. Table 12. Backlight Configuration 1 Register Field Descriptions
      3. 7.6.3  Backlight Configuration 2 Register (Address = 0x03)[Reset = 0x8D]
        1. Table 13. Backlight Configuration 2 Register Field Descriptions
      4. 7.6.4  Backlight Brightness LSB Register (Address = 0x04)[Reset = 0x07]
        1. Table 14. Backlight Brightness LSB Register Field Descriptions
      5. 7.6.5  Backlight Brightness MSB Register (Address = 0x05)[Reset = 0xFF]
        1. Table 15. Backlight Brightness MSB Register Field Descriptions
      6. 7.6.6  Backlight Auto-Frequency Low Threshold Register (Address = 0x06)[Reset = 0x00]
        1. Table 16. Backlight Auto-Frequency Low Threshold Field Descriptions
      7. 7.6.7  Backlight Auto-Frequency High Threshold Register (Address = 0x07)[Reset = 0x00]
        1. Table 17. Backlight Auto-Frequency High Threshold Field Descriptions
      8. 7.6.8  Backlight Enable Register (Address = 0x08)[Reset = 0x00]
        1. Table 18. Backlight Enable Register Field Descriptions
      9. 7.6.9  Bias Configuration 1 Register (Address = 0x09)[Reset = 0x18]
        1. Table 19. Bias Configuration 1 Register Field Descriptions
      10. 7.6.10 Bias Configuration 2 register (Address = 0x0A)[Reset = 0x11]
        1. Table 20. Bias Configuration 2 Register Field Descriptions
      11. 7.6.11 Bias Configuration 3 Register (Address = 0x0B)[Reset = 0x00]
        1. Table 21. Bias Configuration 3 Register Field Descriptions
      12. 7.6.12 LCM Boost Bias Register (Address = 0x0C)[Reset = 0x28]
        1. Table 22. LCM Boost Bias Register Field Descriptions
      13. 7.6.13 VPOS Bias Register (Address = 0x0D)[Reset = 0x1E]
        1. Table 23. VPOS Bias Register Field Descriptions
      14. 7.6.14 VNEG Bias Register (Address = 0x0E)[Reset = 0x1C]
        1. Table 24. VNEG Bias Register Field Descriptions
      15. 7.6.15 Flags Register (Address = 0x0F)[Reset = 0x00]
        1. Table 25. Flags Register Field Descriptions
      16. 7.6.16 Option 1 Register (Address = 0x10)[Reset = 0x06]
        1. Table 26. Option 1 Register Field Descriptions
      17. 7.6.17 Option 2 Register (Address = 0x11)[Reset = 0x35]
        1. Table 27. Option 2 Register Field Descriptions
      18. 7.6.18 PWM-to-Digital Code Readback LSB Register (Address = 0x12)[Reset = 0x00]
        1. Table 28. PWM-to-Digital Code Readback LSB Register Field Descriptions
      19. 7.6.19 PWM-to-Digital Code Readback MSB Register (Address = 0x13)[Reset = 0x00]
        1. Table 29. PWM-to-Digital Code Readback MSB Register Field Descriptions
  8. Application and Implementation
    1. 8.1 Application Information
    2. 8.2 Typical Application
      1. 8.2.1 Design Requirements
      2. 8.2.2 Detailed Design Procedure
        1. 8.2.2.1 Component Selection
          1. 8.2.2.1.1 Inductor Selection
          2. 8.2.2.1.2 Boost Output Capacitor Selection
          3. 8.2.2.1.3 Input Capacitor Selection
      3. 8.2.3 Application Curves
        1. 8.2.3.1 Backlight Curves
          1. 8.2.3.1.1 Two LED Strings
          2. 8.2.3.1.2 Three LED Strings
        2. 8.2.3.2 LCM Bias Curves
  9. Power Supply Recommendations
  10. 10Layout
    1. 10.1 Layout Guidelines
    2. 10.2 Layout Example
  11. 11デバイスおよびドキュメントのサポート
    1. 11.1 デバイス・サポート
      1. 11.1.1 デベロッパー・ネットワークの製品に関する免責事項
      2. 11.1.2 開発サポート
    2. 11.2 ドキュメントのサポート
      1. 11.2.1 関連資料
    3. 11.3 ドキュメントの更新通知を受け取る方法
    4. 11.4 コミュニティ・リソース
    5. 11.5 商標
    6. 11.6 静電気放電に関する注意事項
    7. 11.7 Glossary
  12. 12メカニカル、パッケージ、および注文情報

パッケージ・オプション

メカニカル・データ(パッケージ|ピン)
サーマルパッド・メカニカル・データ
発注情報

Two LED Strings

LM36273 D201_SNVSAC0.gif
2p8s ƒ = 1 MHz L = 10 µH
Figure 69. Backlight Boost Efficiency
LM36273 D203_SNVSAC0.gif
2p8s ƒ = 500 kHz L = 10 µH
Figure 71. Backlight Boost Efficiency
LM36273 D205_SNVSAC0.gif
2p8s ƒ = 250 kHz L = 10 µH
Figure 73. Backlight Boost Efficiency
LM36273 D207_SNVSAC0.gif
2p8s ƒ = 1 MHz L = 10 µH
Figure 75. Backlight Boost Efficiency
LM36273 D209_SNVSAC0.gif
2p8s ƒ = 500 kHz L = 10 µH
Figure 77. Backlight Boost Efficiency
LM36273 D211_SNVSAC0.gif
2p7s ƒ = 1 MHz L = 10 µH
Figure 79. Backlight Boost Efficiency
LM36273 D213_SNVSAC0.gif
2p7s ƒ = 500 kHz L = 10 µH
Figure 81. Backlight Boost Efficiency
LM36273 D215_SNVSAC0.gif
2p7s ƒ = 250 kHz L = 10 µH
Figure 83. Backlight Boost Efficiency
LM36273 D217_SNVSAC0.gif
2p7s ƒ = 1 MHz L = 10 µH
Figure 85. Backlight Boost Efficiency
LM36273 D219_SNVSAC0.gif
2p7s ƒ = 500 kHz L = 10 µH
Figure 87. Backlight Boost Efficiency
LM36273 D221_SNVSAC0.gif
2p6s ƒ = 1 MHz L = 10 µH
Figure 89. Backlight Boost Efficiency
LM36273 D223_SNVSAC0.gif
2p6s ƒ = 500 kHz L = 10 µH
Figure 91. Backlight Boost Efficiency
LM36273 D225_SNVSAC0.gif
2p6s ƒ = 250 kHz L = 10 µH
Figure 93. Backlight Boost Efficiency
LM36273 D227_SNVSAC0.gif
2p6s ƒ = 1 MHz L = 10 µH
Figure 95. Backlight Boost Efficiency
LM36273 D229_SNVSAC0.gif
2p6s ƒ = 500 kHz L = 10 µH
Figure 97. Backlight Boost Efficiency
LM36273 D231_SNVSAC0.gif
2p8s ƒ = 1 MHz L = 4.7 µH
Figure 99. Backlight Boost Efficiency
LM36273 D233_SNVSAC0.gif
2p8s ƒ = 500 kHz L = 4.7 µH
Figure 101. Backlight Boost Efficiency
LM36273 D235_SNVSAC0.gif
2p8s ƒ = 1 MHz L = 4.7 µH
Figure 103. Backlight Boost Efficiency
LM36273 D237_SNVSAC0.gif
2p8s ƒ = 500 kHz L = 4.7 µH
Figure 105. Backlight Boost Efficiency
LM36273 D239_SNVSAC0.gif
2p6s ƒ = 1 MHz L = 4.7 µH
Figure 107. Backlight Boost Efficiency
LM36273 D241_SNVSAC0.gif
2p6s ƒ = 500 kHz L = 4.7 µH
Figure 109. Backlight Boost Efficiency
LM36273 D243_SNVSAC0.gif
2p6s ƒ = 1 MHz L = 4.7 µH
Figure 111. Backlight Boost Efficiency
LM36273 D245_SNVSAC0.gif
2p6s ƒ = 500 kHz L = 4.7 µH
Figure 113. Backlight Boost Efficiency
LM36273 D202_SNVSAC0.gif
2p8s ƒ = 1 MHz L = 10 µH
Figure 70. Backlight System Efficiency
LM36273 D204_SNVSAC0.gif
2p8s ƒ = 500 kHz L = 10 µH
Figure 72. Backlight System Efficiency
LM36273 D206_SNVSAC0.gif
2p8s ƒ = 250 kHz L = 10 µH
Figure 74. Backlight System Efficiency
LM36273 D208_SNVSAC0.gif
2p8s ƒ = 1 MHz L = 10 µH
Figure 76. Backlight System Efficiency
LM36273 D210_SNVSAC0.gif
2p8s ƒ = 500 kHz L = 10 µH
Figure 78. Backlight System Efficiency
LM36273 D212_SNVSAC0.gif
2p7s ƒ = 1 MHz L = 10 µH
Figure 80. Backlight System Efficiency
LM36273 D214_SNVSAC0.gif
2p7s ƒ = 500 kHz L = 10 µH
Figure 82. Backlight System Efficiency
LM36273 D216_SNVSAC0.gif
2p7s ƒ = 250 kHz L = 10 µH
Figure 84. Backlight System Efficiency
LM36273 D218_SNVSAC0.gif
2p7s ƒ = 1 MHz L = 10 µH
Figure 86. Backlight System Efficiency
LM36273 D220_SNVSAC0.gif
2p7s ƒ = 500 kHz L = 10 µH
Figure 88. Backlight System Efficiency
LM36273 D222_SNVSAC0.gif
2p6s ƒ = 1 MHz L = 10 µH
Figure 90. Backlight System Efficiency
LM36273 D224_SNVSAC0.gif
2p6s ƒ = 500 kHz L = 10 µH
Figure 92. Backlight System Efficiency
LM36273 D226_SNVSAC0.gif
2p6s ƒ = 250 kHz L = 10 µH
Figure 94. Backlight System Efficiency
LM36273 D228_SNVSAC0.gif
2p6s ƒ = 1 MHz L = 10 µH
Figure 96. Backlight System Efficiency
LM36273 D230_SNVSAC0.gif
2p6s ƒ = 500 kHz L = 10 µH
Figure 98. Backlight System Efficiency
LM36273 D232_SNVSAC0.gif
2p8s ƒ = 1 MHz L = 4.7 µH
Figure 100. Backlight System Efficiency
LM36273 D234_SNVSAC0.gif
2p8s ƒ = 500 kHz L = 4.7 µH
Figure 102. Backlight System Efficiency
LM36273 D236_SNVSAC0.gif
2p8s ƒ = 1 MHz L = 4.7 µH
Figure 104. Backlight System Efficiency
LM36273 D238_SNVSAC0.gif
2p8s ƒ = 500 kHz L = 4.7 µH
Figure 106. Backlight System Efficiency
LM36273 D240_SNVSAC0.gif
2p6s ƒ = 1 MHz L = 4.7 µH
Figure 108. Backlight System Efficiency
LM36273 D242_SNVSAC0.gif
2p6s ƒ = 500 kHz L = 4.7 µH
Figure 110. Backlight System Efficiency
LM36273 D244_SNVSAC0.gif
2p6s ƒ = 1 MHz L = 4.7 µH
Figure 112. Backlight System Efficiency
LM36273 D246_SNVSAC0.gif
2p6s ƒ = 500 kHz L = 4.7 µH
Figure 114. Backlight System Efficiency