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| TLC59291_15 Datasheet, PDF (37/45 Pages) Texas Instruments – TLC59291 8/16-Channel, Constant Current LED Driver with 7-bit Brightness Control Low Quiescent Current and Full Self Diagnosis for LED Lamp | |||
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9.2.3 Application Curves
TLC59291
SLVSA96 â SEPTEMBER 2015
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 (VLED). The VLED voltage ripple must be less than
5% of it nominal value. Futhremore, the VLED must be set to the voltage calculated by Equation 3.
VLED > VF + 0.4 V (10-mA constant-current example)
(3)
Where
⢠VF = maximum forward voltage of all LEDs.
Copyright © 2015, Texas Instruments Incorporated
Product Folder Links: TLC59291
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