TLC5946

TLC5946 www.ti.com .......................................................................................................................................................... SLVS824B – MARCH 2008 – REVISED JUNE 2008 16-Channel, 12-Bit PWM LED Driver with 6-Bit Dot Correction FEATURES 1 23 16 Channels, Constant Current Sink Output 40-mA Capability (Constant Current Sink) 12-Bit (4096 Steps) Grayscale PWM Control 6-Bit (64 Steps) Dot Correction LED Power-Supply Voltage up to 17 V VCC = 3.0 V to 5.5 V Constant Current Accuracy: – Channel-to-Channel = ±1% (typ) – Device-to-Device = ±2% (typ) 30-MHz Data Transfer Rate 33-MHz Grayscale PWM Clock Extended Serial Interface CMOS Level I/O Schmitt Buffer Input Readable Error Information: – Continuous Base LED Open Detection (LOD) – Thermal Error Flag (TEF) Noise Reduction: – 4-Channel Grouped Delay Operating Temperature: –40°C to +85°C APPLICATIONS Monochrome, Multicolor, Full-Color LED Displays LED Signboards Display Backlighting DESCRIPTION The TLC5946 is a 16-channel, constant current sink LED driver. Each channel is individually adjustable with 4096 pulse-width modulated (PWM) steps and 64 constant current sink steps for dot correction. The dot correction adjusts the brightness variations between LEDs. Both grayscale control and dot correction are accessible via a serial interface. The maximum current value of all 16 channels can be set by a single external resistor. The TLC5946 has two error i...