TLC5973 Datasheet, PDF (28/34 Pages) Texas Instruments – TLC5973 3-Channel, 12-Bit, PWM Constant-Current LED Driver with Single-Wire Interface (EasySet)

TLC5973
SBVS225B – MARCH 2013 – REVISED MAY 2014
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10 Power Supply Recommendations
The power supply voltage should be well regulated. An electrolytic capacitor must be used to reduce the voltage
ripple to less than 5% of the input voltage.
11 Layout
11.1 Layout Guidelines
• The resistor used for the output current setting should be placed near the IREF and GND pins of the device.
• The decoupling capacitor and the shunt regulator resistor should be placed near the VCC pin of the device.
11.2 Layout Example
Via
Top-Side PCB Pattern
Bottom-Side PCB Pattern
OUT0
OUT1
OUT2
GND
VCC
IREF
SDI
SDO
Figure 30. Layout Example
28
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