ZHCSQG6A March 2022 – May 2022 LP5891
PRODUCTION DATA
- 1 特性
- 2 應(yīng)用
- 3 說明
- 4 Revision History
- 5 Pin Configuration and Functions
- 6 Specifications
-
7 Detailed Description
- 7.1 Overview
- 7.2 Functional Block Diagram
- 7.3
Feature Description
- 7.3.1 Independent and Stackable Mode
- 7.3.2 Current Setting
- 7.3.3 Frequency Multiplier
- 7.3.4 Line Transitioning Sequence
- 7.3.5 Protections and Diagnostics
- 7.4 Device Functional Modes
- 7.5 Continuous Clock Series Interface
- 7.6 PWM Grayscale Control
- 7.7 Register Maps
- 8 Application and Implementation
- 9 Power Supply Recommendations
- 10Layout
- 11Device and Documentation Support
- 12Mechanical, Packaging, and Orderable Information
封裝選項(xiàng)
機(jī)械數(shù)據(jù) (封裝 | 引腳)
散熱焊盤機(jī)械數(shù)據(jù) (封裝 | 引腳)
- RRF|76
訂購信息
7.3.5.4.3 LSD Caterpillar Removal
Figure 7-15 shows the LSD caterpillar issue caused by short LED. Suppose the LED0-1 is a short LED. When it scans to the line1 and the OUT1 is turned off, the OUT1 voltage is the same with scan line0 voltage because of the short path of the LED0-1. At this time, there is a current path from the line0 to the GND through the LED1-1 and SW1-1, which causes LED1-1 light unwanted.
Figure 7-15 LED Short CaterpillarThe LP5891 device implements internal circuits that can eliminate the caterpillar issue by short LEDs. As is shown in Figure 7-15, the LED short caterpillar is caused by the voltage of the Vclamp on the line. So it can be solved by adjusting the LSD_RM_EN (see FC3 for more details) to let the voltage drop of the LED1-1 be smaller than LED forward voltage.