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 output terminal. The thermal error flag (TEF)
indicates an overtemperature condition.
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