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TI TLC59731DR 3-Channel 8-Bit PWM LED Driver With Single-Wire Interface

Lighting and display technologies are constantly advancing, whether it be the indicator lights on our daily-use smart devices, automotive lighting systems, or large outdoor displays. Behind all of these applications lies the need for high-performance LED driver chips to ensure precise brightness control and vibrant colour reproduction.

Shenzhen Mingjiada Electronics Co., Ltd., a globally renowned distributor of electronic components, offers the TLC59731DR LED driver in stock. This chip is a 3-channel, 8-bit PWM LED driver featuring a single-wire interface (EasySet) design, significantly simplifying system wiring complexity.

Product Overview Of TLC59731DR

The TLC59731DR device is an easy-to-use 3-channel, 50 mA sink-current LED driver. Its single-wire 600 kbps serial interface (EasySet) effectively reduces wiring costs. The TLC59731DR LED driver supports 8-bit pulse width modulation (PWM) resolution and features simple gamma correction functionality. The display repetition rate can reach up to 3.1 kHz (typical value) using an integrated 6 MHz grey scale (GS) clock oscillator. The TLC59731DR driver also supports unlimited cascading functionality.  

The output sink current can be set via an external resistor connected in series to the OUTn terminal. The TLC59731DR integrates an internal current shunt regulator, enabling use in applications with higher VCC power supply voltages.

The TLC59731DR is packaged in an 8-SOIC package, providing up to 50 mA sink current capability per channel, supporting a wide input voltage range from 3 V to 6 V, and delivering an output voltage up to 21 V.

The TLC59731DR integrates a 6MHz grey-scale clock oscillator with a typical display repetition rate of 3.1kHz, offering 8-bit (256-level) PWM grey-scale control with a simple gamma correction function to enhance display consistency.

The TLC59731DR features a single-wire interface with a data transfer rate of up to 600 kbps, supporting unlimited cascading capability, making it easy to expand and drive more LED channels, ideal for large-scale LED array applications.

Specifications Of TLC59731DR

Product Category: LED Lighting Driver IC

Mounting Method: SMD/SMT

Package/Case: SOIC-8

Number of Outputs: 3 outputs

Output Current: 50 mA  

Input Voltage - Maximum: 6 V  

Input Voltage - Minimum: 3 V  

Topology: Boost  

Operating Frequency: 600 kHz  

Output Voltage: 21 V  

Minimum Operating Temperature: -40°C  

Maximum Operating Temperature: +125°C  

Features: Internal GS clock, single-wire interface, shunt regulator

Input Voltage:    3 V to 6 V

Number of Channels:    3 channels

Operating Supply Voltage:    3 V to 6 V

Features Of TLC59731DR

Three sink current channels

Current capability:

– 50 mA per channel

Gray Scale (GS) control and PWM:

– 8-bit (256 levels) with simple gamma correction

Single-wire interface (EasySet™)

Power Supply (VCC) Voltage Range:

– No internal shunt regulator mode: 3 V to 5.5 V

– Internal shunt regulator mode: 3 V to 6 V

Maximum Output Terminal Voltage: Up to 21 V

Integrated Shunt Regulator

Maximum Data Transfer Rate:

– Bits per second (bps): 600 kbps

Internal GS Clock Oscillator: 6 MHz (typical)

Display repetition rate: 3.1 kHz (typical)  

Output delay switching to prevent inrush current  

Unlimited device cascading  

Operating temperature: –40°C to 85°C

Application Of TLC59731DR

The TLC59731DR is suitable for a variety of application scenarios, particularly excelling in RGB LED cluster light displays.

In the automotive electronics sector, the TLC59731DR can be used for interior ambient lighting, instrument panel backlighting, and vehicle status indicators; in consumer electronics, it can drive status indicator lights and decorative lighting for smart devices.

In industrial applications, the TLC59731DR is suitable for backlighting large displays, status indicator panels, and industrial control panels; in IoT devices, it can provide rich visual feedback for smart home products.