TLC5940

Product Folder Sample & Buy Technical Documents Tools & Software Support & Community TLC5940 SLVS515D – DECEMBER 2004 – REVISED NOVEMBER 2015 TLC5940 16-Channel LED Driver With DOT Correction and Grayscale PWM Control 1 Features 1 16 Channels 12 bit (4096 Steps) Grayscale PWM Control Dot Correction – 6 bit (64 Steps) – Storable in Integrated EEPROM Drive Capability (Constant-Current Sink) – 0 mA to 60 mA (VCC < 3.6 V) – 0 mA to 120 mA (VCC > 3.6 V) LED Power Supply Voltage up to 17 V VCC = 3 V to 5.5 V Serial Data Interface Controlled In-Rush Current 30 MHz Data Transfer Rate CMOS Level I/O Error Information – LOD: LED Open Detection – TEF: Thermal Error Flag 2 Applications Monocolor, Multicolor, Full-Color LED Displays LED Signboards Display Backlighting General, High-Current LED Drive 3 Description The TLC5940 is a 16-channel, constant-current sink LED driver. Each channel has an individually adjustable 4096-step grayscale PWM brightness control and a 64-step, constant-current sink (dot correction). The dot correction adjusts the brightness variations between LED channels and other LED drivers. The dot correction data is stored in an integrated EEPROM. Both grayscale control and dot correction are accessible through a serial interface. A single external resistor sets the maximum current value of all 16 channels. The TLC5940 features two error information circuits. The LED open detection (LOD) indicates a broken or disconnected LED at an o...