SLVS515D December 2004 – November 2015 TLC5940
The VCC power supply voltage should be decoupled by placing a 0.1uF ceramic capacitor close to VCC pin and GND plane. Depending on panel size, several electrolytic capacitors must be placed on board equally distributed to get a well regulated LED supply voltage (VLED). VLED voltage ripple should be less than 5% of its nominal value. Furthermore, the VLED should be set to the voltage calculated by equation:
VLED > VF + 0.4V ( 10mA constant current example) where Vf = maximum forward voltage of all LEDs.