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% (Typical)
    • Device-to-Device = ±2% (Typical)
  • 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 OverTemperature Conditions
    • Restart Under Normal Temperature
  • Noise Reduction:
    • 4-Channel Grouped Delay to Prevent Inrush Current
  • Operating Temperature: –40°C to 85°C

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Parametrics Compare all products in Signage/Linear

 
Special Features
Analog Dimming Steps
Data Transfer Rate (Typ) (MHz)
Ch to Ch Accuracy (Typ) (+/- %)
Rating
Operating Temperature Range (C)
Pin/Package
TLC5947 TLC5951 TLC5952
Internal GS Clock
Thermal Shutdown   
Error Flag
Fault Detection
LED Open Detection
Power Good
Thermal Shutdown   
Error Flag
Fault Detection
LED Open Detection
Power Good
Thermal Shutdown   
  256    128   
30    30    35   
2    1.5    1   
Catalog    Catalog    Catalog   
-40 to 85    -40 to 85    -40 to 85   
32HTSSOP
32VQFN   
38HTSSOP
40VQFN   
32HTSSOP   

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