Product category:
Power Supply ICs and Controllers
News Release from: Texas Instruments (April 2006-) | Subject: TLC5943
Edited by the Electronicstalk Editorial
Team on 17 April 2008
LED driver powers up colour displays
Enhanced spectrum pulsewidth modulation improves image quality and reduces flicker noise in monochrome, multicolour and full-colour LED displays.
Texas Instruments has developed a 16-channel, 50mA constant-current sink LED driver that runs from an input voltage up to 17V The TLC5943's integrated enhanced spectrum pulsewidth modulation (PWM) improves image quality and reduces flicker noise in monochrome, multicolour and full-colour LED displays, as well as LED signboards and display backlighting
This article was originally published on Electronicstalk on 4 Apr 2006 at 8.00am (UK)
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Each of the TLC5943's 16 channels has an individually adjustable 16bit (64K-step) greyscale PWM brightness control feature with an auto-data refresh and display repeat function.
The channels are divided into four groups, and each group has an associated turn-on delay to maximise system voltage stability.
All 16 channels can be adjusted with the device's 7bit brightness control feature.
A designer can use a single external resistor to set the maximum current value for all channels.
The device's brightness control feature, which can be accessed through a common 30MHz interface, adjusts the average current levels to compensate for brightness variations that occur from one LED to the next.
The TLC5943 features two error information circuits.
The device's LED open detection indicates a broken or disconnected LED at an output terminal.
A thermal error flag indicates an overtemperature condition.
The TLC5943 is available now in a 28-pin, HSSTOP package or in a 32-pin, QFN package.
Suggested resale price starts at US $2.00 in 1000-unit quantities for the HSSTOP package and $2.20 for the QFN package.
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