TLC5946

具有 6 位点校正功能的 16 通道 12 位 PWM LED 驱动器

The is a 16-channel, constant current sink LED driver. Each channel is individually adjustable with 4096 pulse-width modulated PWM steps and 64 constant current sink steps for dot correction. The dot correction adjusts the brightness variations between LEDs. Both grayscale control and dot correction are accessible via a serial interface. The maximum current value of all 16 channels can be set by a single external resistor.

The TLC5946 has two error information circuits: one for LED open detection LOD, and a thermal error flag TEF. LOD detects a broken or disconnected LED during display period. TEF indicates an over-temperature condition.

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16 Channels, Constant Current Sink Output

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40-mA Capability Constant Current Sink

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12-Bit 4096 Steps Grayscale PWM Control

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6-Bit 64 Steps Dot Correction

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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% typ

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Device-to-Device = ±2% typ

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30-MHz Data Transfer Rate

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33-MHz Grayscale PWM Clock

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Extended Serial Interface

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CMOS Level I/O

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Schmitt Buffer Input

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Readable Error Information:

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Continuous Base 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

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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

PowerPAD is a trademark of Texas Instruments, Inc.