TLC6984EVM

BOOSTERPACK TLC6984

Description The TLC6984 evaluation module is used as a reference for engineering demonstration and evaluation. Included in this user’s guide are setup instructions, a schematic diagram, printed board (PCB) layout and a bill of materials (BOM).

Features

• 48 current source channels from 0.2mA to 20mA

• 16 scan line Switches with 190mΩ RDS(ON)

• Ultra low power consumption

• High speed and low EMI continuous clock series interface (CCSI)

Applications

• Narrow Pixel Pitch (NPP) LED display

• Mini and micro-LED products

1 Evaluation Module Overview

1.1 Introduction

The TLC6984 is a highly integrated, common cathode matrix LED display driver with 48 constant current sources and 16 scanning FETs. One TLC6984 is capable of driving 16 × 16 RGB LED pixels, while stacking two TLC6984s can drive 32 × 32 RGB LED pixels, three TLC6984s are capable of driving 48 × 48 RGB LED pixels, and stacking four TLC6984s can drive 64 × 64 RGB LED pixels. To achieve low power consumption, the device supports separated power supplies for the red, green, and blue LEDs by the common cathode structure. Furthermore, the operation power of the TLC6984 is significantly reduced by ultra-low operation voltage range (Vcc down to 2.5V) and ultra-low operation current (Icc down to 3.6mA).

This user’s guide describes the TLC6984 evaluation module used as a reference for engineering demonstration and evaluation. Included in this user’s guide are setup instructions, a schematic diagram, printed board (PCB) layout, and a bill of materials (BOM).

1.2 Kit Contents

• One TLC6984EVM board

Note that this EVM requires a controller (for example, MCU), which is not included.

1.3 Specification

The TLC6984 device supports per-channel current from 0.2mA to 20mA, with typical 1% channel-to-channel current deviation and typical 1% device-to-device current deviation. The DC current value of all 48 channels is set by an external IREF resistor and can be adjusted by the 8-step global brightness control (BC) and the 256-step per-color group brightness control (CC_R/CC_G/CC_B).

1.4 Device Information

The TLC6984 implements a high speed, dual-edge transmission interface to support high device count daisychained and high refresh rate while minimizing electrical-magnetic interference (EMI). The device supports up to 25MHz SCLK (external) and up to 160MHz GCLK (internal). Meanwhile, the device integrates enhanced circuits and intelligent algorithms to solve the various display challenges in Narrow Pixel Pitch (NPP) LED display applications and mini and micro-LED products. The display challenges are dim at the fist scan line, upper and downside ghosting, non-uniformity in low gray scale, coupling, caterpillar caused by open or short LEDs, which make the TLC6984 an excellent choice in such applications.

The TLC6984 also implements LED open and weak, short and short detections and removals during operations and can also report this information out to the accompanying digital processor.

2 Hardware

2.1 TLC6984 EVM Board

The driver IC side of the TLC6984EVM board is shown in Figure 2-1.