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TLC5940 Datasheet(PDF) 1 Page - Texas Instruments |
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TLC5940 Datasheet(HTML) 1 Page - Texas Instruments |
1 / 29 page PWP RHB NT www.ti.com FEATURES APPLICATIONS DESCRIPTION Delay x0 12−Bit Grayscale PWM Control DC Register GS Register DC EEPROM Constant Current Driver LED Open Detection Temperature Error Flag (TEF) Max. OUTn Current Delay x1 12−Bit Grayscale PWM Control DC Register GS Register DC EEPROM Constant Current Driver LED Open Detection Delay x15 6−Bit Dot 12−Bit Grayscale PWM Control DC Register GS Register DC EEPROM Constant Current Driver LED Open Detection OUT0 OUT1 OUT15 SOUT SIN SCLK IREF XERR XLAT GSCLK BLANK DCPRG DCPRG DCPRG VPRG VPRG VPRG GND VCC VPRG Input Shift Register Input Shift Register VPRG 11 0 23 12 191 180 95 90 11 6 5 VPRG 0 0 95 96 191 LED Open Detection (LOD) 5 95 90 6 11 DCPRG 0 192 96 0 1 0 1 0 1 0 1 GS Counter CNT CNT CNT CNT 96 96 Status Information: LOD, TED, DC DATA 192 0 191 1 0 0 1 VREF =1.24 V Correction 6−Bit Dot Correction 6−Bit Dot Correction 0 1 Blank TLC5940 SLVS515A – DECEMBER 2004 – REVISED AUGUST 2005 16 CHANNEL LED DRIVER WITH DOT CORRECTION AND GRAYSCALE PWM CONTROL • Monocolor, Multicolor, Fullcolor LED Displays • 16 Channels • LED Signboards • 12 bit (4096 Steps) Grayscale PWM Control • Display Backlighting • Dot Correction • General, High-Current LED Drive – 6 bit (64 Steps) – Storable in Integrated EEPROM • Drive Capability (Constant Current Sink) The TLC5940 is a 16-channel constant-current sink – 0 mA to 60 mA (VCC < 3.6 V) LED driver. Each channel has an individually adjust- – 0 mA to 120 mA (VCC > 3.6 V) able 4096-step grayscale PWM brightness control and a 64-step constant-current sink (dot correction). • LED Power Supply Voltage up to 17 V The dot correction adjusts the brightness variations • VCC = 3 V to 5.5 V between LED channels and other LED drivers. The • Serial Data Interface, SPI comp. dot correction data is stored in an integrated EEPROM. Both grayscale control and dot correction • Controlled In-Rush Current are accessible via a serial interface. A single external • 30-MHz Data Transfer Rate resistor sets the maximum current value of all 16 • CMOS Level I/O channels. • Error Information The TLC5940 features two error information circuits. – LOD: LED Open Detection The LED open detection (LOD) indicates a broken or disconnected LED at an output terminal. The thermal – TEF: Thermal Error Flag error flag (TEF) indicates an overtemperature con- dition. Please be aware that an important notice concerning availability, standard warranty, and use in critical applications of Texas Instruments semiconductor products and disclaimers thereto appears at the end of this data sheet. PowerPAD is a trademark of Texas Instruments. PRODUCTION DATA information is current as of publication date. Copyright © 2004–2005, Texas Instruments Incorporated Products conform to specifications per the terms of the Texas Instruments standard warranty. Production processing does not necessarily include testing of all parameters. |
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