TLC5954RTQR集成电路（IC）的LED驱动器规格书PDF中文资料

TLC5954RTQR属于集成电路（IC）的LED驱动器。由德州仪器制造生产的TLC5954RTQRLED 驱动器器件属于 LED 驱动器电源管理集成电路 (PMIC) 系列，可通过标称固定电压的电源为负载（通常为发光二极管）提供电流，并且电流可控。它与用于电压调节的类似产品的主要区别在于，这类器件提供较低的反馈电压（以提高系统能效），而且通常可对器件工作点进行外部控制，可在照明应用中用于实现调光功能。

1 Features

1. 48 Constant-Current Sink Output Channels with

On or Off Control

. Current Capability:

. 34.9 mA for 32 Channels

. 24.4 mA 16 Channels

. No External Resistor for Current Setting

. Maximum Current Control (MC): 3 Bits (8 Steps)

. Global Brightness Control (BC) for Each Color

Group: 7 Bits (128 Steps), Three Groups

. LED Power-Supply Voltage: Up to 10 V

. VCC = 3.0 V to 3.6 V

. Constant-Current Accuracy:

. Channel-to-Channel = ±1% (typ), ±3% (max)

. Device-to-Device = ±2% (typ), ±4% (max)

. Data Transfer Rate: 30 MHz

. BLANK Pulse Duration: 40 ns (min)

. LED Open Detection (LOD)

. LED Short Detection (LSD)

. Power-Save Mode (PSM): 7-μA Consumption,

High-Speed Recovery

. Undervoltage Lockout Sets Default Data

. Delayed Switching Minimizes Inrush Current

. Operating Temperature: .40°C to +85°C

2 Applications

. LED Video Displays

. Variable Message Signs (VMS)

. Illumination

3 Description

The TLC5954 is a 48-channel, constant-current sink

LED driver. Each channel can be turned on or off by

writing data to an internal register. The output

channels (OUTXn) are grouped into three groups of

16 channels. Each channel group (R, G, and B) has a

128-step global brightness control (BC) function. The

maximum current value of all 48 channels can be set with an 8-step maximum current control (MC)

function. The device has two error flags: LED open

detection (LOD) and LED short detection (LSD). The

error flags can be read via a serial interface port. The device also has a power-save mode that sets the

total current consumption to 7 μA (typ) when all

outputs are off.