TLC59461 Texas instruments

TLC59461

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TLC59461

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Описание

The TLC59461 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 serial interface. The maximum current value of all 16 channels can be set by a single external resistor. The TLC59461 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.To allow lower power dissipation, the TLC59461 does not implement the Auto Output Off function available in the TLC5946.

16 Channels, Constant Current Sink Output
40-mA Capability (Constant Current Sink)
12-Bit (4096 Steps) Grayscale PWM Control
6-Bit (64 Steps) Dot Correction
LED Power-Supply Voltage up to 17 V
V_CC = 3.0 V to 5.5 V
Constant Current Accuracy:
- Channel-to-Channel = ±1% (typ)
- Device-to-Device = ±2% (typ)
30-MHz Data Transfer Rate
33-MHz Grayscale PWM Clock
Extended Serial Interface
CMOS Level I/O
Schmitt Buffer Input
Readable Error Information:
- Continuous Base LED Open Detection (LOD)
- Thermal Error Flag (TEF)
Noise Reduction:
- 4-Channel Grouped Delay
Operating Temperature: -40°C to +85°C
APPLICATIONS
- Monochrome, Multicolor, Full-Color LED Displays
- LED Signboards
- Display Backlighting

Features	Dot Correction, Error Flag, Fault Detection, LED Open Detection, LED Short to Ground Detection, LED Short to VLED Detection, PWM LED Driver, Power good
Analog dimming steps	64
Data transfer rate (typ) (MHz)	30
Ch to ch accuracy (typ) (±%)	1
Rating	Catalog
Operating temperature range (°C)	-40 to 85