ZHCSJT3B May   2019  – August 2020 LP5009 , LP5012

PRODUCTION DATA  

  1. 1 特性
  2. 2 应用
  3. 3 说明
  4. 4 Revision History
  5. 5 Description (continued)
  6. 6 Pin Configuration and Functions
    1.     Pin Functions
  7. 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 Timing Characteristics
    7. 7.7 Typical Characteristics
  8. 8 Detailed Description
    1. 8.1 Overview
    2. 8.2 Functional Block Diagram
    3. 8.3 Feature Description
      1. 8.3.1 PWM Control for Each Channel
        1. 8.3.1.1 Independent Color Mixing Per RGB LED Module
        2. 8.3.1.2 Independent Intensity Control Per RGB LED Module
          1. 8.3.1.2.1 Intensity-Control Register Configuration
          2. 8.3.1.2.2 Logarithmic- or Linear-Scale Intensity Control
        3. 8.3.1.3 12-Bit, 29-kHz PWM Generator Per Channel
          1. 8.3.1.3.1 PWM Generator
        4. 8.3.1.4 PWM Phase-Shifting
      2. 8.3.2 LED Bank Control
      3. 8.3.3 Current Range Setting
      4. 8.3.4 Automatic Power-Save Mode
      5. 8.3.5 Protection Features
        1. 8.3.5.1 Thermal Shutdown
        2. 8.3.5.2 UVLO
    4. 8.4 Device Functional Modes
    5. 8.5 Programming
      1. 8.5.1 I2C Interface
        1. 8.5.1.1 Data Validity
        2. 8.5.1.2 Start and Stop Conditions
        3. 8.5.1.3 Transferring Data
        4. 8.5.1.4 I2C Slave Addressing
        5. 8.5.1.5 Control-Register Write Cycle
        6. 8.5.1.6 Control-Register Read Cycle
        7. 8.5.1.7 Auto-Increment Feature
    6. 8.6 Register Maps
      1.      45
      2. 8.6.1  DEVICE_CONFIG0 (Address = 0h) [reset = 0h]
      3. 8.6.2  DEVICE_CONFIG1 (Address = 1h) [reset = 3Ch]
      4. 8.6.3  LED_CONFIG0 (Address = 2h) [reset = 00h]
      5. 8.6.4  BANK_BRIGHTNESS (Address = 3h) [reset = FFh]
      6. 8.6.5  BANK_A_COLOR (Address = 4h) [reset = 00h]
      7. 8.6.6  BANK_B_COLOR (Address = 5h) [reset = 00h]
      8. 8.6.7  BANK_C_COLOR (Address = 6h) [reset = 00h]
      9. 8.6.8  LED0_BRIGHTNESS (Address = 7h) [reset = FFh]
      10. 8.6.9  LED1_BRIGHTNESS (Address = 8h) [reset = FFh]
      11. 8.6.10 LED2_BRIGHTNESS (Address = 9h) [reset = FFh]
      12. 8.6.11 LED3_BRIGHTNESS (Address = 0Ah) [reset = FFh]
      13. 8.6.12 OUT0_COLOR (Address = 0Bh) [reset = 00h]
      14. 8.6.13 OUT1_COLOR (Address = 0Ch) [reset = 00h]
      15. 8.6.14 OUT2_COLOR (Address = 0Dh) [reset = 00h]
      16. 8.6.15 OUT3_COLOR (Address = 0Eh) [reset = 00h]
      17. 8.6.16 OUT4_COLOR (Address = 0Fh) [reset = 00h]
      18. 8.6.17 OUT5_COLOR (Address = 10h) [reset = 00h]
      19. 8.6.18 OUT6_COLOR (Address = 11h) [reset = 00h]
      20. 8.6.19 OUT7_COLOR (Address = 12h) [reset = 00h]
      21. 8.6.20 OUT8_COLOR (Address = 13h) [reset = 00h]
      22. 8.6.21 OUT9_COLOR (Address = 14h) [reset = 00h]
      23. 8.6.22 OUT10_COLOR (Address = 15h) [reset = 00h]
      24. 8.6.23 OUT11_COLOR (Address = 16h) [reset = 00h]
      25. 8.6.24 RESET (Address = 17h) [reset = 00h]
  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
      3. 9.2.3 Application Curves
  10. 10Power Supply Recommendations
  11. 11Layout
    1. 11.1 Layout Guidelines
    2. 11.2 Layout Examples
  12. 12Device and Documentation Support
    1. 12.1 Related Links
    2. 12.2 Receiving Notification of Documentation Updates
    3. 12.3 支持资源
    4. 12.4 Trademarks
    5. 12.5 静电放电警告
    6. 12.6 术语表
  13. 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

8.3.1.4 PWM Phase-Shifting

A PWM phase-shifting scheme allows delaying the time when each LED driver is active. When the LED drivers are not activated simultaneously, the peak load current from the pre-stage power supply is significantly decreased. The scheme also reduces input-current ripple and ceramic-capacitor audible ringing. LED drivers are grouped into three different phases.

  • Phase 1—the rising edge of the PWM pulse is fixed. The falling edge of the pulse is changed when the duty cycle changes. Phase 1 is applied to LED0, LED3, LED6, LED9.
  • Phase 2—the middle point of the PWM pulse is fixed. The pulse spreads in both directions when the PWM duty cycle is increased. Phase 2 is applied to LED1, LED4, LED7, LED10.
  • Phase 3—the falling edge of the PWM pulse is fixed. The rising edge of the pulse is changed when the duty cycle changes. Phase 3 is applied to LED2, LED5, LED8, LED11.
GUID-AAD85FF8-ED19-4D27-9DFC-958ED014D7F8-low.gifFigure 8-4 PWM Phase-Shifting