ZHCSE87A October   2015  – September 2023 DLPA3000

PRODUCTION DATA  

  1.   1
  2. 1 特性
  3. 2 应用
  4. 3 说明
  5. 4 Revision History
  6. 5 说明（续）
  7. 6 Pin Configuration and Functions
  8. 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 SPI Timing Parameters
  9. 8 Detailed Description
    1. 8.1 Overview
    2. 8.2 功能方框图
    3. 8.3 Feature Description
      1. 8.3.1 Supply and Monitoring
        1. 8.3.1.1 Supply
        2. 8.3.1.2 Monitoring
          1. 8.3.1.2.1 Block Faults
          2. 8.3.1.2.2 Low Battery and UVLO
          3. 8.3.1.2.3 Auto LED Turn Off Functionality
          4. 8.3.1.2.4 Thermal Protection
      2. 8.3.2 Illumination
        1. 8.3.2.1 Programmable Gain Block
        2. 8.3.2.2 LDO Illum
        3. 8.3.2.3 Illumination Driver A
        4. 8.3.2.4 RGB Strobe Decoder
          1. 8.3.2.4.1 Break Before Make (BBM)
          2. 8.3.2.4.2 Openloop Voltage
          3. 8.3.2.4.3 Transient Current Limit
        5. 8.3.2.5 Illumination Monitoring
          1. 8.3.2.5.1 Power Good
          2. 8.3.2.5.2 Ratio Metric Overvoltage Protection
        6. 8.3.2.6 Load Current and Supply Voltage
        7. 8.3.2.7 Illumination Driver Plus Power FETS Efficiency
      3. 8.3.3 DMD Supplies
        1. 8.3.3.1 LDO DMD
        2. 8.3.3.2 DMD HV Regulator
          1. 8.3.3.2.1 Power-Up and Power-Down Timing
        3. 8.3.3.3 DMD/DLPC Buck Converters
        4. 8.3.3.4 DMD Monitoring
          1. 8.3.3.4.1 Power Good
          2. 8.3.3.4.2 Overvoltage Fault
      4. 8.3.4 Buck Converters
        1. 8.3.4.1 LDO Bucks
        2. 8.3.4.2 General Purpose Buck Converters
        3. 8.3.4.3 Buck Converter Monitoring
          1. 8.3.4.3.1 Power Good
          2. 8.3.4.3.2 Overvoltage Fault
        4. 8.3.4.4 Buck Converter Efficiency
      5. 8.3.5 Auxiliary LDOs
      6. 8.3.6 Measurement System
      7. 8.3.7 Digital Control
        1. 8.3.7.1 SPI
        2. 8.3.7.2 Interrupt
        3. 8.3.7.3 Fast-Shutdown in Case of Fault
    4. 8.4 Device Functional Modes
    5. 8.5 Register Maps
  10. 9 Application and Implementation
    1. 9.1 Application Information
    2. 9.2 Typical Applications
      1. 9.2.1 Typical Application Setup Using DLPA3000
        1. 9.2.1.1 Design Requirements
        2. 9.2.1.2 Detailed Design Procedure
        3. 9.2.1.3 Application Curve
      2. 9.2.2 Typical Application with DLPA3000 Internal Block Diagram
  11. 10Power Supply Recommendations
  12. 11Layout
    1. 11.1 Layout Guidelines
    2. 11.2 Layout Example
    3. 11.3 SPI Connections
    4. 11.4 RLIM Routing
    5. 11.5 LED Connection
    6. 11.6 Thermal Considerations
  13. 12Device and Documentation Support
    1. 12.1 第三方产品免责声明
    2. 12.2 Device Support
      1. 12.2.1 Device Nomenclature
    3. 12.3 Related Links
    4. 12.4 接收文档更新通知
    5. 12.5 支持资源
    6. 12.6 Trademarks
    7. 12.7 支持资源
    8. 12.8 静电放电警告
    9. 12.9 术语表
  14. 13Mechanical, Packaging, and Orderable Information

封装选项

机械数据 (封装 | 引脚)
散热焊盘机械数据 (封装 | 引脚)
订购信息
8.3.1.2.3 Auto LED Turn Off Functionality

The DLPA3000 can be supplied from either a battery pack or an adapter. The DLPA3000 uses several warning and detection levels to prevent system damage when the supply voltage drops below the predefined level or an interruption occurs.

For example, interruption of the supply voltage occurs when the adapter switches to another main outlet. If a battery pack is installed, the system power control should switch to the battery pack. A change of supply voltage from, for instance, 20 V to 8 V can occur, and thus the OVP level (which is ratio-metric; see Ratio Metric Overvoltage Protection) could become lower than VLED. An OVP fault will be triggered and the system will switch off.

The ILLUM_LED_AUTO_OFF_EN (0x01, bit 2) function can be used to prevent the system from turning off in these circumstances. This function disables the LEDs when the supply voltage drops below LED auto off level. Keep the LED auto off level the same as the BAT_LOW_WARN (0x0C, bit 2) level. When the ILLUM_LED_AUTO_OFF_EN (0x01, bit 2) function is enabled, once a supply voltage drop is detected to below LED auto off level, the LEDs switch off and the system starts sending lower current levels to have a lower VLED. After using lower currents, the LEDs can be switched on again by disabling the ILLUM_LED_AUTO_OFF_EN (0x01, bit 2) function. As a result, the system can continue working at the lower supply voltage using a lower intensity. The system monitors the BAT_LOW_WARN (0x0C, bit2) status, and once the main adapter is plugged in again (seen by BAT_LOW_WARN(0x0C, bit2) being low), the ILLUM_LED_AUTO_OFF_EN (0x01, bit 2) function can be enabled again. The LED currents can be restored to their original levels from before the supply voltage drop.