Overview

TLC5940 Booster Pack PCB (parts are not included.)

Details

Two TLC5940 16ch 12bit PWM constant current driver chips for a total of 32 channels.

BOM:

• IC1, IC2 - TLC5940NT
• R1, R2 - 2.2k (~18mA) see datasheet for other current values
• C1, C2 - 0.1uF

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 via a serial interface. A single external resistor sets the maximum current value of all 16 channels.