TLC59461
www.ti.com.......................................................................................................
TLC59461
www.ti.com............................................................................................................................................... SLVS896A – NOVEMBER 2008 – REVISED MARCH 2009
16-Channel, 12-Bit PWM LED Driver with 6-Bit Dot Correction
FEATURES
1
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 informat...