TLC59401
www.ti.com
SBVS137 – DECEMBER 2009
16-CHANNEL LED DRIVER WITH DOT CORRECTION AND GRAYSCALE PWM CONTROL
Chec...
TLC59401
www.ti.com
SBVS137 – DECEMBER 2009
16-CHANNEL LED DRIVER WITH DOT CORRECTION AND GRAYSCALE PWM CONTROL
Check for Samples: TLC59401
FEATURES
1
23 16 Channels 12-Bit (4096 Steps) Grayscale PWM Control Dot Correction
– 6-Bit (64 Steps) Drive Capability (Constant-Current Sink)
– 0 mA to 80 mA (VCC ≤ 3.6 V) – 0 mA to 120 mA (VCC > 3.6 V) LED Power-Supply
Voltage up to 17 V VCC = 3.0 V to 5.5 V Serial Data Interface Controlled Inrush Current 30-MHz Data Transfer Rate
CMOS Level I/O Error Information – LOD: LED Open Detection – TEF: Thermal Error Flag
APPLICATIONS
Monocolor, Multicolor, Full-Color LED Displays
LED Signboards
Display Back-Lighting
DESCRIPTION
The TLC59401 is a 16-channel, constant-current sink, LED driver. Each channel has an individually adjustable 4096-step grayscale PWM brightness control and a 64-step constant-current sink (dot correction). The dot correction adjusts the brightness variations between LED channels and other LED drivers. Both grayscale control and dot correction are accessible via a serial interface. A single external resistor sets the maximum current value of all 16 channels.
The TLC59401 features two error information circuits. The LED open detection (LOD) indicates a broken or disconnected LED at an output terminal. The thermal error flag (TEF) indicates an over-temperature condition.
VCC GND
SCLK
SIN
XLAT
IREF
Max. OUTn VREF
Current
=1.24V
GSCLK BLANK
GS Counter CNT
0 Status Information:
LOD,...