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

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   
1.50 | 1ku    1.55 | 1ku    1.20 | 1ku   

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