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.
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.
Data Vin (Min) (V): 3
Data Vin (Max) (V): 5.5
Output Channels: 16
Analog Dimming Steps: 64
Data Input: Serial
Data Transfer Rate (Typ) (MHz): 30
Ch to Ch Accuracy (Typ) (+/- %): 1
Per Channel PWM Steps: 4096
Per Channel Drive (mA): 120
LED Voltage (Max) (V): 17
Special Features: Fault Reporting, LED Open Detection, Power Good/Error Flag
Operating Temperature Range (C): -40 to 85 C
Package: 28 PDIP
1 x TLC5940NT chip