TLC5943

具有 7 位器件级亮度控制的 16 位 ES-PWM

The is a 16-channel, constant current sink driver. Each channel is individually adjustable with 65,536 enhanced spectrum pulse-width modulated PWM steps controlled by grayscale GS data. All output drivers are adjustable with 128 constant sink current steps at same value controlled by brightness control BC data. Both GS data and BC data are writable via a serial interface port. The maximum current value of all 16 channels can be set by a single external resistor.

The TLC5943 has two error detection circuits for LED open detection LOD and a thermal error flag TEF. LOD detects a broken or disconnected LED and shorted LED to GND during the display period. TEF indicates an over-temperature condition; when a TEF is set, all output drivers are turned off. When the TEF is cleared, all output drivers are restarted.

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16 Channels, Constant Current Sink Output

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50-mA Capability Constant Current Sink

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16-Bit 65,536 Steps Grayscale Control with Enhanced Spectrum ES PWM

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7-Bit 128 Steps Global Brightness Control for All Channels with Sink Current

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LED Power-Supply Voltage up to 17 V

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VCC = 3.0 V to 5.5 V

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Constant Current Accuracy:

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Channel-to-Channel = ±1.5%

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Device-to-Device = ±3%

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CMOS Level I/O

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30-MHz Data Transfer Rate

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33-MHz Grayscale Control Clock

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Auto Display Repeat

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Auto Data Refresh

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Continuous Base LED Open Detection LOD:

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Detect LED opening and LED short to GND during display

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Thermal Shutdown TSD:

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Automatic shutdown at high temperature conditions

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Restart under normal temperature

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Readable Error Information:

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LED Open Detection LOD

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Thermal Error Flag TEF

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Noise Reduction:

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4-channel grouped delay to prevent inrush current

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Operating Temperature: –40°C to +85°C

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APPLICA ONS

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Monochrome, Multicolor, Full-Color LED Displays

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LED Signboards

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Display Backlighting

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