24-Channel, 12-Bit PWM LED Driver with Internal Oscillator - TLC5947

TLC5947 (ACTIVE)

24-Channel, 12-Bit PWM LED Driver with Internal Oscillator

Description

The TLC5947 is a 24-channel, constant current sink LED driver. Each channel is individually adjustable with 4096 pulse-width modulated (PWM) steps. PWM control is repeated automatically with the programmed grayscale (GS) data. GS data are written via a serial interface port. The current value of all 24 channels is set by a single external resistor.

The TLC5947 has a thermal shutdown (TSD) function that turns off all output drivers during an over-temperature condition. All of the output drivers automatically restart when the temperature returns to normal conditions.

Features

  • 24 Channels, Constant Current Sink Output
  • 30-mA Capability (Constant Current Sink)
  • 12-Bit (4096 Steps) PWM Grayscale Control
  • LED Power-Supply Voltage up to 30 V
  • VCC = 3.0 V to 5.5 V
  • Constant Current Accuracy:
    • Channel-to-Channel = ±2% (typ)
    • Device-to-Device = ±2% (typ)
  • CMOS Logic Level I/O
  • 30-MHz Data Transfer Rate (Standalone)
  • 15-MHz Data Transfer Rate (Cascaded Devices, SCLK Duty = 50%)
  • Shift Out Data Changes With Falling Edge to Avoid Data Shift Errors
  • Auto Display Repeat
  • 4-MHz Internal Oscillator
  • Thermal Shutdown (TSD):
    • Automatic shutdown at over temperature conditions
    • Restart under normal temperature
  • noise Reduction:
    • 4-channel grouped delay to prevent inrush current
  • Operating Temperature: -40°C to +85°C
  • APPLICATIONS
    • Static LED Displays
    • Message Boards
    • Amusement Illumination
    • TV Backlighting

View more

Parametrics Compare all products in Signage/Linear

 
Data Vin (Min) (V)
Data Vin (Max) (V)
Output Channels
Analog Dimming Steps
Data Input
Data Transfer Rate (Typ) (MHz)
Ch to Ch Accuracy (Typ) (+/- %)
Per Channel PWM Steps
Per Channel Drive (mA)
LED Voltage (Max) (V)
Special Features
Rating
Operating Temperature Range (C)
Pin/Package
Approx. Price (US$)
TLC5947 TLC5951 TLC5952
3     3     3    
5.5     5.5     5.5    
24     24     24    
  256     128    
Serial     Serial     Serial    
30     30     35    
2     1.5     1    
4096     4096      
30     40     35    
30     15     15    
Internal GS Clock
Thermal Shutdown    
Fault Reporting
LED Open Detection
Power Good/Error Flag
Thermal Shutdown    
Fault Reporting
LED Open Detection
Power Good/Error Flag
Thermal Shutdown    
Catalog     Catalog     Catalog    
-40 to 85     -40 to 85     -40 to 85    
32HTSSOP
32VQFN    
38HTSSOP
40VQFN    
32HTSSOP    
1.95 | 1ku     1.55 | 1ku     1.35 | 1ku    

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