TLC5917QDRQ1屬于集成電路（IC）的LED驅動器。由美國德州儀器公司制造生產(chǎn)的TLC5917QDRQ1LED 驅動器器件屬于 LED 驅動器電源管理集成電路 (PMIC) 系列，可通過標稱固定電壓的電源為負載（通常為發(fā)光二極管）提供電流，并且電流可控。它與用于電壓調節(jié)的類似產(chǎn)品的主要區(qū)別在于，這類器件提供較低的反饋電壓（以提高系統(tǒng)能效），而且通常可對器件工作點進行外部控制，可在照明應用中用于實現(xiàn)調光功能。

1 Features

1? Qualified for Automotive Applications

? AEC-Q100 Qualified With the Following Results:

– Device Temperature Grade 1: –40°C to 125°C

Ambient Operating Temperature Range

– Device HBM ESD Classification Level 1C

– Device CDM ESD Classification Level C4

? Eight Constant-Current Output Channels

? Output Current Adjusted Through External

Resistor

? Constant Output Current Range: 5 mA to 120 mA

? Constant Output Current Invariant to Load Voltage

Change

? Open Load, Short Load, and Overtemperature

Detection

? 256-Step Programmable Global Current Gain

? Excellent Output Current Accuracy:

– Between Channels: < ±3% (Maximum)

– Between ICs: < ±6% (Maximum)

? Fast Response of Output Current

? 30-MHz Clock Frequency

? Schmitt Trigger Input

? 3.3-V or 5-V Supply Voltage

? Thermal Shutdown for Overtemperature

Protection

2 Applications

? General LED Lighting Applications

? LED Display Systems

? LED Signage

? Automotive LED Lighting

? White Goods

? Gaming Machines and Entertainment

3 Description

The TLC591x-Q1 Constant-Current LED Sink Drivers

is designed to work alone or cascaded. Because each output is independently controlled, they can be

programmed to be on or off by the user. The high

LED voltage (VLED) allows for the use of one LED

per output or multiple LEDs on a single string. With

independently controlled outputs supplied with

constant current, the LEDs can be combined in parallel to create higher currents on a single string.

The constant sink current for all channels is set

through a single external resistor. This allows

different LED drivers in the same application to sink various currents which provides optional

implementation of multicolor LEDs. An additional

advantage of the independent outputs is the ability to

leave unused channels floating. The flexibility of the

TLC591x-Q1 LED driver is ideal for applications such as (but not limited to): automotive LED lighting, 7-

segment displays, scrolling single-color displays,

gaming machines, white goods, video billboards, and

video panels.