TLC5951 - 具有 7 位点校正和 8 位全局亮度控制功能的 24 通道、12 位 PWM LED 驱动器

TLC5951是TI德州仪器公司的一款标牌/线性产品，TLC5951是具有 7 位点校正和 8 位全局亮度控制功能的 24 通道、12 位 PWM LED 驱动器，本站介绍了TLC5951的封装应用图解、特点和优点、功能等，并给出了与TLC5951相关的TI元器件型号供参考。

TLC5951 - 具有 7 位点校正和 8 位全局亮度控制功能的 24 通道、12 位 PWM LED 驱动器 - 标牌/线性 - LED驱动器 - 德州仪器

产品描述

The TLC5951 is a 24-channel, constant-current sink driver. Each channel has an individually-adjustable, 4096-step, pulse width modulation (PWM) grayscale (GS) brightness control and 128 step constant-current dot correction (DC). The dot correction adjusts brightness deviation between channels and other LED drivers. The output channels are grouped into three groups of eight channels. Each channel group has a 256-step global brightness control (BC) function and an individual grayscale clock input.

GS, DC, and BC data are accessible via a serial interface port. DC and BC can be programmed via a dedicated serial interface port.

The TLC5951 has three error detection circuits for LED open detection (LOD), LED short detection (LSD), and thermal error flag (TEF). LOD detects a broken or disconnected LED while LSD detects a shorted LED. TEF indicates an over-temperature condition.

产品特性

24-Channel Constant-Current Sink Output
Current Capability: 40 mA
Selectable Grayscale (GS) Control with PWM: 12-Bit (4096 Step), 10-Bit (1024 Step), 8-Bit (256 Step)
Three Independent Grayscale Clocks for Three Color Groups
Dot Correction (DC): 7-Bit (128 Step)
Global Brightness Control (BC) for Each Color Group: 8-Bit (256 Step)
Auto Display Repeat Function
Independent Data Port for GS and BC/DC Data
Communication Path Between Each Data Port
LED Power-Supply Voltage up to 15 V
VCC = 3.0 V to 5.5 V
Constant-Current Accuracy:
- Channel-to-Channel = ±1.5%
- Device-to-Device = ±3%
CMOS Logic Level I/O
Data Transfer Rate: 30 MHz
33-MHz Grayscale Control Clock
Continuous Base LED Open Detection (LOD)
Continuous Base LED Short Detection (LSD)
Thermal Shutdown (TSD) with Auto Restart
Grouped Delay to Prevent Inrush Current
Operating Air Temperature: –40°C to +85°C
Packages: HTSSOP-38, QFN-40

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