ZHCSJT3B May 2019 – August 2020 LP5009 , LP5012
PRODUCTION DATA
- 1 特性
- 2 应用
- 3 说明
- 4 Revision History
- 5 Description (continued)
- 6 Pin Configuration and Functions
- 7 Specifications
-
8 Detailed Description
- 8.1 Overview
- 8.2 Functional Block Diagram
- 8.3
Feature Description
- 8.3.1 PWM Control for Each Channel
- 8.3.2 LED Bank Control
- 8.3.3 Current Range Setting
- 8.3.4 Automatic Power-Save Mode
- 8.3.5 Protection Features
- 8.4 Device Functional Modes
- 8.5 Programming
- 8.6
Register Maps
- 45
- 8.6.1 DEVICE_CONFIG0 (Address = 0h) [reset = 0h]
- 8.6.2 DEVICE_CONFIG1 (Address = 1h) [reset = 3Ch]
- 8.6.3 LED_CONFIG0 (Address = 2h) [reset = 00h]
- 8.6.4 BANK_BRIGHTNESS (Address = 3h) [reset = FFh]
- 8.6.5 BANK_A_COLOR (Address = 4h) [reset = 00h]
- 8.6.6 BANK_B_COLOR (Address = 5h) [reset = 00h]
- 8.6.7 BANK_C_COLOR (Address = 6h) [reset = 00h]
- 8.6.8 LED0_BRIGHTNESS (Address = 7h) [reset = FFh]
- 8.6.9 LED1_BRIGHTNESS (Address = 8h) [reset = FFh]
- 8.6.10 LED2_BRIGHTNESS (Address = 9h) [reset = FFh]
- 8.6.11 LED3_BRIGHTNESS (Address = 0Ah) [reset = FFh]
- 8.6.12 OUT0_COLOR (Address = 0Bh) [reset = 00h]
- 8.6.13 OUT1_COLOR (Address = 0Ch) [reset = 00h]
- 8.6.14 OUT2_COLOR (Address = 0Dh) [reset = 00h]
- 8.6.15 OUT3_COLOR (Address = 0Eh) [reset = 00h]
- 8.6.16 OUT4_COLOR (Address = 0Fh) [reset = 00h]
- 8.6.17 OUT5_COLOR (Address = 10h) [reset = 00h]
- 8.6.18 OUT6_COLOR (Address = 11h) [reset = 00h]
- 8.6.19 OUT7_COLOR (Address = 12h) [reset = 00h]
- 8.6.20 OUT8_COLOR (Address = 13h) [reset = 00h]
- 8.6.21 OUT9_COLOR (Address = 14h) [reset = 00h]
- 8.6.22 OUT10_COLOR (Address = 15h) [reset = 00h]
- 8.6.23 OUT11_COLOR (Address = 16h) [reset = 00h]
- 8.6.24 RESET (Address = 17h) [reset = 00h]
- 9 Application and Implementation
- 10Power Supply Recommendations
- 11Layout
- 12Device and Documentation Support
- 13Mechanical, Packaging, and Orderable Information
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机械数据 (封装 | 引脚)
散热焊盘机械数据 (封装 | 引脚)
- RUK|20
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.
Figure 8-4 PWM Phase-Shifting