ZHCSGN5A March 2017  – June 2017 LP8863-Q1

PRODUCTION DATA. 

  1. 特性
  2. 应用
  3. 说明
  4. 修订历史记录
  5. 器件比较表
  6. Pin Configuration and Functions
  7. Specifications
    1. 7.1 Absolute Maximum Ratings
    2. 7.2 ESD Ratings
    3. 7.3 Recommended Operating Conditions
    4. 7.4 Thermal Information
    5. 7.5 Electrical Characteristics
    6. 7.6 Protection Electrical Characteristics
    7. 7.7 LED Current Sink and LED PWM Electrical Characteristics
    8. 7.8 Power-Line FET and RISENSE Electrical Characteristics
    9. 7.9 Input PWM Electrical Characteristics
    10. 7.10Boost Converter Electrical Characteristics
    11. 7.11Oscillator
    12. 7.12Charge Pump
    13. 7.13Logic Interface Characteristics
    14. 7.14Timing Requirements for SPI Interface
    15. 7.15Timing Requirements for I2C Interface
    16. 7.16Typical Characteristics
  8. Detailed Description
    1. 8.1Overview
    2. 8.2Functional Block Diagram
    3. 8.3Feature Description
      1. 8.3.1Control Interface
      2. 8.3.2Boost Controller
        1. 8.3.2.1Boost Adaptive Voltage Control
          1. 8.3.2.1.1FB Divider Using Two-Resistor Method
          2. 8.3.2.1.2FB Divider Using Three-Resistor Method
        2. 8.3.2.2Boost Sync and Spread Spectrum
        3. 8.3.2.3Boost Output Discharge
      3. 8.3.32X Charge Pump
      4. 8.3.41.8-V LDO
      5. 8.3.5LED Current Sinks
        1. 8.3.5.1LED Output Current Setting
        2. 8.3.5.2 LED Output PWM Clock Generation
        3. 8.3.5.3LED Output String Configuration
          1. 8.3.5.3.1Independent Cluster Brightness Control Mode
      6. 8.3.6Brightness Control
        1. 8.3.6.1Brightness Control Signal Path
        2. 8.3.6.2Hybrid Dimming
        3. 8.3.6.3Sloper
        4. 8.3.6.4Dither
      7. 8.3.7Die Temperature Read-Out and Thermal Window Detector
      8. 8.3.8Protection and Fault Detections
        1. 8.3.8.1LED Faults
        2. 8.3.8.2Boost Faults
        3. 8.3.8.3Power-Line Faults
        4. 8.3.8.4VDD Undervoltage Fault
        5. 8.3.8.5Thermal Shutdown
        6. 8.3.8.6Overview of the Fault/Protection Schemes
    4. 8.4Device Functional Modes
      1. 8.4.1 State Diagram
      2. 8.4.2 Shutdown
      3. 8.4.3 Device Initialization
      4. 8.4.4 Standby Mode
      5. 8.4.5 Power-line FET Soft Start
      6. 8.4.6 Boost Start-Up
      7. 8.4.7 Normal Mode
      8. 8.4.8 Discharge Mode
      9. 8.4.9 Fault Recovery
      10. 8.4.10Latch Fault
      11. 8.4.11Start-Up Sequence
      12. 8.4.12Shutdown Sequence
    5. 8.5Programming
      1. 8.5.1Serial Interface Selection
      2. 8.5.2SPI Interface
      3. 8.5.3I2C-Compatible Interface
      4. 8.5.4Programming Examples
        1. 8.5.4.1General Configuration Registers
        2. 8.5.4.2Clearing Fault Interrupts
        3. 8.5.4.3Disabling Fault Interrupts
        4. 8.5.4.4Diagnostic Registers
        5. 8.5.4.5Cluster Mode Configuration and Control Registers
    6. 8.6Register Maps
      1. 8.6.1FULLMAP Registers
        1. 8.6.1.1 BL_MODE Register (Offset = 20h) [reset = 300h]
        2. 8.6.1.2 DISP_BRT Register (Offset = 28h) [reset = 0h]
        3. 8.6.1.3 GROUPING1 Register (Offset = 30h) [reset = 0h]
        4. 8.6.1.4 GROUPING2 Register (Offset = 32h) [reset = 0h]
        5. 8.6.1.5 USER_CONFIG1 Register (Offset = 40h) [reset = B0h]
        6. 8.6.1.6 USER_CONFIG2 Register (Offset = 42h) [reset = 0h]
        7. 8.6.1.7 INTERRUPT_ENABLE_3 Register (Offset = 4Eh) [reset = 200Ah]
        8. 8.6.1.8 INTERRUPT_ENABLE_1 Register (Offset = 50h) [reset = A02Ah]
        9. 8.6.1.9 INTERRUPT_ENABLE_2 Register (Offset = 52h) [reset = 80h]
        10. 8.6.1.10INTERRUPT_STATUS_1 Register (Offset = 54h) [reset = 0h]
        11. 8.6.1.11INTERRUPT_STATUS_2 Register (Offset = 56h) [reset = 0h]
        12. 8.6.1.12INTERRUPT_STATUS_3 Register (Offset = 58h) [reset = 0h]
        13. 8.6.1.13JUNCTION_TEMPERATURE Register (Offset = E8h) [reset = 0h]
        14. 8.6.1.14TEMPERATURE_LIMIT_HIGH Register (Offset = ECh) [reset = 7Dh]
        15. 8.6.1.15TEMPERATURE_LIMIT_LOW Register (Offset = EEh) [reset = 69h]
        16. 8.6.1.16CLUSTER1_BRT Register (Offset = 13Ch) [reset = FFFFh]
        17. 8.6.1.17CLUSTER2_BRT Register (Offset = 148h) [reset = FFFFh]
        18. 8.6.1.18CLUSTER3_BRT Register (Offset = 154h) [reset = FFFFh]
        19. 8.6.1.19CLUSTER4_BRT Register (Offset = 160h) [reset = FFFFh]
        20. 8.6.1.20CLUSTER5_BRT Register (Offset = 16Ch) [reset = FFFFh]
        21. 8.6.1.21BRT_DB_CONTROL Register (Offset = 178h) [reset = 0h]
        22. 8.6.1.22LED0_CURRENT Register (Offset = 1C2h) [reset = FFFh]
        23. 8.6.1.23LED1_CURRENT Register (Offset = 1C4h) [reset = FFFh]
        24. 8.6.1.24LED2_CURRENT Register (Offset = 1C6h) [reset = FFFh]
        25. 8.6.1.25LED3_CURRENT Register (Offset = 1C8h) [reset = FFFh]
        26. 8.6.1.26LED4_CURRENT Register (Offset = 1CAh) [reset = FFFh]
        27. 8.6.1.27LED5_CURRENT Register (Offset = 1CCh) [reset = FFFh]
        28. 8.6.1.28BOOST_CONTROL Register (Offset = 288h) [reset = 0h]
        29. 8.6.1.29SHORT_THRESH Register (Offset = 28Ah) [reset = 882h]
        30. 8.6.1.30FSM_DIAGNOSTICS Register (Offset = 2A4h) [reset = 0h]
        31. 8.6.1.31PWM_INPUT_DIAGNOSTICS Register (Offset = 2A6h) [reset = 0h]
        32. 8.6.1.32PWM_OUTPUT_DIAGNOSTICS Register (Offset = 2A8h) [reset = 0h]
        33. 8.6.1.33LED_CURR_DIAGNOSTICS Register (Offset = 2AAh) [reset = 0h]
        34. 8.6.1.34ADAPT_BOOST_DIAGNOSTICS Register (Offset = 2ACh) [reset = 0h]
        35. 8.6.1.35AUTO_DETECT_DIAGNOSTICS Register (Offset = 2AEh) [reset = 0h]
  9. Application and Implementation
    1. 9.1Application Information
    2. 9.2Typical Applications
      1. 9.2.1Full Feature Application for Display Backlight
        1. 9.2.1.1Design Requirements
        2. 9.2.1.2Detailed Design Procedure
          1. 9.2.1.2.1 Inductor Selection
          2. 9.2.1.2.2 Output Capacitor Selection
          3. 9.2.1.2.3 Input Capacitor Selection
          4. 9.2.1.2.4 Charge Pump Output Capacitor
          5. 9.2.1.2.5 Charge Pump Flying Capacitor
          6. 9.2.1.2.6 Output Diode
          7. 9.2.1.2.7 Switching FET
          8. 9.2.1.2.8 Boost Sense Resistor
          9. 9.2.1.2.9 Power-Line FET
          10. 9.2.1.2.10Input Current Sense Resistor
          11. 9.2.1.2.11Feedback Resistor Divider
          12. 9.2.1.2.12Critical Components for Design
        3. 9.2.1.3Application Curves
      2. 9.2.2Application With Basic/Minimal Operation
        1. 9.2.2.1Design Requirements
        2. 9.2.2.2Detailed Design Procedure
        3. 9.2.2.3Application Curves
      3. 9.2.3SEPIC Mode Application
        1. 9.2.3.1Design Requirements
        2. 9.2.3.2Detailed Design Procedure
          1. 9.2.3.2.1 Inductor Selection
          2. 9.2.3.2.2 Coupling Capacitor Selection
          3. 9.2.3.2.3 Output Capacitor Selection
          4. 9.2.3.2.4 Input Capacitor Selection
          5. 9.2.3.2.5 Charge Pump Output Capacitor
          6. 9.2.3.2.6 Charge Pump Flying Capacitor
          7. 9.2.3.2.7 Switching FET
          8. 9.2.3.2.8 Output Diode
          9. 9.2.3.2.9 Switching Sense Resistor
          10. 9.2.3.2.10Power-Line FET
          11. 9.2.3.2.11Input Current Sense Resistor
          12. 9.2.3.2.12Feedback Resistor Divider
          13. 9.2.3.2.13Critical Components for Design
        3. 9.2.3.3Application Curves
  10. 10Power Supply Recommendations
  11. 11Layout
    1. 11.1Layout Guidelines
    2. 11.2Layout Example
  12. 12器件和文档支持
    1. 12.1器件支持
      1. 12.1.1Third-Party Products Disclaimer
    2. 12.2接收文档更新通知
    3. 12.3社区资源
    4. 12.4商标
    5. 12.5静电放电警告
    6. 12.6Glossary
  13. 13机械、封装和可订购信息

封装选项

机械数据 (封装 | 引脚)
  • DCP|38
订购信息

特性

  • 符合汽车应用 要求
  • 具有符合 AEC-Q100 标准的下列结果:
    • 器件温度 1 级:-40℃ 至 +125℃ 的环境运行温度范围
  • 输入电压工作范围:3V 至 48V
  • 六路高精度电流阱
    • 电流匹配度为 1%(典型值)
    • 使用 152Hz LED 输出 PWM 频率时,调光比为 32000:1
    • 使用 SPI、I2C 或 PWM 输入时,最高 16 位 LED 调光分辨率
    • 自动检测使用过的 LED 灯串并调整 LED 通道相移
    • 每个通道的独立电流控制
  • 混合 PWM 和电流调光功能
  • 最高 47V VOUT 升压或 SEPIC 直流/直流控制器
    • 开关频率:300kHz 至 2.2MHz
    • 升压扩频功能可降低 EMI
    • 升压同步输入以从外部时钟设置升压开关频率
    • 集成电荷泵支持低 VIN 条件,如冷启动
    • 禁用升压时,输出电压自动放电
  • 详尽的故障诊断
  • 简化原理图

    LP8863-Q1 simpschem_snvsab6.gif

应用

  • 为以下应用提供背光:
    • 汽车信息娱乐系统
    • 汽车仪表盘
    • 智能车镜
    • 抬头显示屏 (HUD)
    • 中央信息显示屏 (CID)
    • 音视频导航 (AVN)

说明

LP8863-Q1 是带有升压控制器的汽车高效 LED 驱动器。六路高精度电流阱支持相移,它可根据使用的通道数自动调整。可通过 SPI 或 I2C 接口单独和全局控制电流阱亮度;也可以通过 PWM 输入全局控制亮度。

升压控制器具有基于 LED 电流阱余量电压的自适应输出电压控制。该特性可在所有条件下将电压调节到能够满足需要的最低水平,从而更大限度降低功耗。凭借宽范围可调频率,LP8863-Q1 能够避免 AM 无线电频带的干扰。

LP8863-Q1 支持内置混合 PWM 和电流调光,从而降低了 EMI、延长了 LED 使用寿命并提高了总光学效率。

器件信息(1)

器件型号封装封装尺寸(标称值)
LP8863-Q1HTSSOP (38)9.70mm x 4.40mm
  1. 要了解所有可用封装,请见数据表末尾的可订购产品附录。

系统效率

LP8863-Q1 D007_page1.gif

修订历史记录

Changes from * Revision (March 2017) to A Revision

  • 首次公开发布的完整产品说明书Go