1FEATURES

23· 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

· VCC = 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

DESCRIPTION

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.