1 Features

1? Three Sink Current Channels

? Current Capability:

– 50 mA per Channel

? Grayscale (GS) Control With PWM:

– 8-Bit (256 Steps) 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

? OUT Terminals Maximum Voltage: Up to 21 V

? Integrated Shunt Regulator

? Data Transfer Maximum Rate:

– Bits per Second (bps): 600 kbps

? Internal GS Clock Oscillator: 6 MHz (Typical)

? Display Repeat Rate: 3.1 kHz (Typical)

? Output Delay Switching to Prevent Inrush Current

? Unlimited Device Cascading

? Operating Temperature: –40°C to 85°C

2 Applications

RGB LED Cluster Lamp Displays

3 Description

The TLC59731 device is an easy-to-use, 3-channel,

50-mA sink current LED driver. The single-wire, 600-

kbps serial interface (EasySet) provides a solution for

minimizing wiring cost. The LED driver provides 8-bit

pulse width modulation (PWM) resolution and a

simple gamma correction feature. The display repeat

rate is achieved at 3.1 kHz (typical) with an integrated

6-MHz grayscale (GS) clock oscillator. The driver also

provides unlimited cascading capability.

Output sink current can be set by each external

resistor connected to the OUTn terminal in series.

The TLC59731 has an internal shunt regulator that

can be used for higher VCC power-supply voltage

applications.