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.