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Texas Instruments TLC6984 48×16 Matrix LED Display Driver

Texas Instruments TLC6984 48×16 Matrix LED Display Driver is a highly-integrated common cathode matrix LED display driver with 48 constant current sources and 16 scanning FETs. Besides driving 16 × 16 and 32 × 32 RGB LED pixels as TLC6983, three TLC6984s are capable of driving 48 × 48 RGB LED pixels, and stacking four TLC6984s can drive 64 × 64 RGB LED pixels. The device supports separated power supplies for the red, green, and blue LEDs by its common cathode structure to achieve low power consumption. 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).

The Texas Instruments TLC6984 implements a high-speed, dual-edge transmission interface to support high device count daisy-chained and high refresh rate while minimizing electrical-magnetic interference (EMI). The device supports up to 25MHz SCLK (external) and 40MHz to 160MHz GCLK (internal, typical values) with different GCLK multiplier modes and frequencies. 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. These challenges include dim at the first scan line, upper and downside ghosting, non-uniformity in low grayscale, coupling, and caterpillar caused by open or short LEDs, which make the TLC6984 a perfect choice in such applications.

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

Features

Separated V_CC and V_R/G/B power supply
- 2.5V to 5.5V V_CC voltage range
- 2.5V to 5.5V V_R/G/B voltage range
48 current source channels from 0.2mA to 20mA
- Channel-to-channel accuracy: ±0.5% (typ.), ±2% (max.); device-to-device accuracy: ±0.5% (typ.), ±2% (max.)
- Low knee voltage (0.26V (max.) when I_OUT = 5mA)
- 3-bits (8 steps) global brightness control
- 8-bits (256 steps) color brightness control
- Maximum 16-bits (65536 steps) PWM grayscale control
16 scan line switches with 190mΩ R_DS(ON)
Ultra-low power consumption
- Independent V_CC down to 2.5V
- Lowest I_CC down to 3.6mA with 50MHz GCLK
- Intelligent power saving mode with I_CC down to 0.9mA
Built-in SRAM to support 1 – 64 multiplexing
- A single device with 16 multiplexing to support 48 × 16 LEDs or 16 × 16 RGB pixels
- Dual devices stackable with 32 multiplexing to support 96 × 32 LEDs or 32 × 32 RGB pixels
- Three devices stackable with 48 multiplexing to support 144 × 48 LEDs or 48 × 48 RGB pixels
- Four devices stackable with 64 multiplexing to support 192 × 64 LEDs or 64 × 64 RGB pixels

High speed and low EMI Continuous Clock Series Interface (CCSI)
- Only three wires: SCLK / SIN / SOUT
- External 25MHz (max.) SCLK with dual-edge transmission mechanism (internal 50MHz)
- Internal frequency multiplier to support high GCLK frequency
Optimized display performance
- Programmable scan line sequence
- Upside and downside ghosting removal
- Low grayscale enhancement
- LED open, short, and weak short detection and removal

Applications

Narrow Pixel Pitch (NPP) LED display
Mini and micro-LED products

Texas Instruments TLC6984 48×16 Matrix LED Display Driver

Features

Applications

Functional Block Diagram

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