TLC59291_16 Datasheet, PDF (38/46 Pages) Texas Instruments – 8/16-Channel, Constant Current LED Driver

TLC59291
SLVSA96A – SEPTEMBER 2015 – REVISED MARCH 2016
9.2.3 Application Curves
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Time = 400 ns/div
Figure 37. Output Waveform When BLANK_Mode = 0
Time = 400 ns/div
Figure 38. Output Waveform When BLANK_Mode = 1
10 Power Supply Recommendations
The VCC power supply voltage should be decoupled by placing a 0.1-µF ceramic capacitor close to the VCC pin
and GND plane. Depending on the panel size, several electrolytic capacitors must be placed on the board
equally distributed to get a well regulated LED supply voltage (V_LED). The V_LED voltage ripple must be less than
5% of it nominal value. Futhremore, the V_LED must be set to the voltage calculated by Equation 3.
V_LED > V_F + 0.4 V (10-mA constant-current example)
(3)
Where
• V_F = maximum forward voltage of all LEDs.
38
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