TLC5946 16-Channel, 12-bit PWM LED Driver with 6-Bit Dot Correction | TI.com

TLC5946 (ACTIVE) 16-Channel, 12-bit PWM LED Driver with 6-Bit Dot Correction

 

Description

The TLC5946 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 a serial interface. The maximum current value of all 16 channels can be set by a single external resistor.

The TLC5946 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.

Features

  • 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

PowerPAD is a trademark of Texas Instruments, Inc.

Parametrics

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Part number Order Features Analog dimming steps Data transfer rate (Typ) (MHz) Ch to ch accuracy (Typ) (+/- %) Package Group Package size: mm2:W x L (PKG) Rating Operating temperature range (C)
TLC5946 Order now Dot Correction
Error Flag
Fault Detection
LED Open Detection
LED Short to Ground Detection
LED Short to VLED Detection
PWM LED Driver
Power Good    
64     30     1     HTSSOP | 28
TSSOP | 28
VQFN | 32    
28HTSSOP: 43 mm2: 4.4 x 9.7 (HTSSOP | 28)
28TSSOP: 62 mm2: 6.4 x 9.7 (TSSOP | 28)
32VQFN: 25 mm2: 5 x 5 (VQFN | 32)    
Catalog     -40 to 85    
TLC5940 Order now Dot Correction
Error Flag
Fault Detection
LED Open Detection
LED Short to Ground Detection
LED Short to VLED Detection
PWM LED Driver
Power Good    
64     30     1     HTSSOP | 28
VQFN | 32    
28HTSSOP: 43 mm2: 4.4 x 9.7 (HTSSOP | 28)
32VQFN: 25 mm2: 5 x 5 (VQFN | 32)    
Catalog     -40 to 85    
TLC59401 Order now Dot Correction
Error Flag
Fault Detection
LED Open Detection
LED Short to Ground Detection
LED Short to VLED Detection
PWM LED Driver
Power Good    
64     30     1     HTSSOP | 28
VQFN | 32    
28HTSSOP: 43 mm2: 4.4 x 9.7 (HTSSOP | 28)
32VQFN: 25 mm2: 5 x 5 (VQFN | 32)    
Catalog     -40 to 85    
TLC5941 Order now Dot Correction
Error Flag
Fault Detection
LED Open Detection
LED Short to Ground Detection
LED Short to VLED Detection
PWM LED Driver
Power Good    
64     30     1     HTSSOP | 28
VQFN | 32    
28HTSSOP: 43 mm2: 4.4 x 9.7 (HTSSOP | 28)
32VQFN: 25 mm2: 5 x 5 (VQFN | 32)    
Catalog     -40 to 85    
TLC5943 Order now Error Flag
Fault Detection
LED Open Detection
LED Short to Ground Detection
LED Short to VLED Detection
PWM LED Driver
Power Good
Thermal Shutdown    
128     30     1.5     HTSSOP | 28
VQFN | 32    
28HTSSOP: 43 mm2: 4.4 x 9.7 (HTSSOP | 28)
32VQFN: 25 mm2: 5 x 5 (VQFN | 32)    
Catalog     -40 to 85    
TLC5944 Samples not available Dot Correction
Error Flag
Fault Detection
LED Open Detection
LED Short to Ground Detection
LED Short to VLED Detection
PWM LED Driver
Power Good
Thermal Shutdown    
64     30     1     HTSSOP | 28
VQFN | 32    
28HTSSOP: 43 mm2: 4.4 x 9.7 (HTSSOP | 28)
32VQFN: 25 mm2: 5 x 5 (VQFN | 32)    
Catalog     -40 to 85    
TLC5945 Order now Dot Correction
Error Flag
Fault Detection
LED Open Detection
LED Short to Ground Detection
LED Short to VLED Detection
PWM LED Driver
Power Good    
64     30     1     HTSSOP | 28
VQFN | 32    
28HTSSOP: 43 mm2: 4.4 x 9.7 (HTSSOP | 28)
32VQFN: 25 mm2: 5 x 5 (VQFN | 32)    
Catalog     -40 to 85    
TLC59461 Samples not available Dot Correction
Error Flag
Fault Detection
LED Open Detection
LED Short to Ground Detection
LED Short to VLED Detection
PWM LED Driver
Power Good    
64     30     1     HTSSOP | 28     28HTSSOP: 43 mm2: 4.4 x 9.7 (HTSSOP | 28)     Catalog     -40 to 85    
TLC59482 Order now PWM LED Driver     64     33     1     SSOP | 24     24SSOP: 52 mm2: 6 x 8.65 (SSOP | 24)     Catalog     -40 to 85    
TLC5948A Order now Dot Correction
Error Flag
Fault Detection
LED Open Detection
LED Short to Ground Detection
LED Short to VLED Detection
PWM LED Driver
Power Good
Thermal Shutdown    
128     33     1.5     HTSSOP | 24
SSOP | 24    
24HTSSOP: 34 mm2: 4.4 x 7.8 (HTSSOP | 24)
24SSOP: 52 mm2: 6 x 8.65 (SSOP | 24)    
Catalog     -40 to 85    
TLC5949 Order now Error Flag
Fault Detection
LED Open Detection
LED Short to Ground Detection
LED Short to VLED Detection
PWM LED Driver
Power Good
Thermal Shutdown    
128     33     0.6     HTSSOP | 24
SSOP | 24    
24HTSSOP: 34 mm2: 4.4 x 7.8 (HTSSOP | 24)
24SSOP: 52 mm2: 6 x 8.65 (SSOP | 24)