TLC59116F_15 Datasheet, PDF (23/38 Pages) Texas Instruments – 16-Channel Fast-Mode Plus I2C Bus LED Driver

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9 Application and Implementation
TLC59116F
SCLS714C – MARCH 2009 – REVISED SEPTEMBER 2015
NOTE
Information in the following applications sections is not part of the TI component
specification, and TI does not warrant its accuracy or completeness. TI’s customers are
responsible for determining suitability of components for their purposes. Customers should
validate and test their design implementation to confirm system functionality.
9.1 Application Information
This section highlights some of the design considerations for implementing this device in various applications.
9.1.1 Setting LED Current
The LED current is primarily dependent on the supply voltage, the forward voltage of the LED, and the series
resistor (R_SET). In many applications the supply voltage and LED forward voltage cannot be adjusted. Hence,
R_SET is utilized to adjust the LED current. This calculation is discussed in detail in the typical application example.
9.1.2 PWM Brightness Dimming
The perceived brightness of the LEDs can be adjusted by use of PWM dimming. For example, an LED driven at
50% duty cycle will appear less bright than it would at 100% duty cycle. The TLC59116F offers duty cycle control
for each individual channel and also offers group duty cycle control. Refer to the Register Map for details
regarding programmable duty cycle.
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