TLC5942

具有 7 位点校正功能的 16 通道 12 位 PWM

The is a 16-channel, constant current sink driver. Each channel is individually adjustable with 4096 pulse-width modulated PWM steps and 128 constant current sink steps for dot correction. Dot correction adjusts the brightness variations between LEDs. Both grayscale control and dot correction are accessible via separate, dedicated serial interface ports. The maximum current value of all 16 channels can be set by a single external resistor.

The TLC5942 has two error detection circuits for LED open detection LOD and a thermal error flag TEF. LOD detects a broken or disconnected LED 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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12-Bit 4096 Steps Grayscale Control with PWM

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7-Bit 128 Steps Dot Correction with Sink Current

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LED Power-Supply Voltage up to 17 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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VCC = 3.0 V to 5.5 V

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CMOS Level I/O

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30-MHz Data Transfer Rate

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30-MHz Grayscale Control Clock

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Dedicated Ports for Grayscale and Dot Correction

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Continuous Base LED Open Detection LOD

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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

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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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