TLC5947 24-Channel, 12-Bit PWM LED Driver with Internal Oscillator | TI.com

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

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)
TLC5947 Order now Internal GS Clock
PWM LED Driver
Thermal Shutdown    		   30     2     HTSSOP | 32
VQFN | 32    		 32HTSSOP: 89 mm2: 8.1 x 11 (HTSSOP | 32)
32VQFN: 25 mm2: 5 x 5 (VQFN | 32)    		 Catalog     -40 to 85    
TLC5951 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    		 256     30     1.5     HTSSOP | 38
VQFN | 40
WQFN | 40    		 38HTSSOP: 101 mm2: 8.1 x 12.5 (HTSSOP | 38)
40VQFN: 36 mm2: 6 x 6 (VQFN | 40)
40WQFN: 36 mm2: 6 x 6 (WQFN | 40)    		 Catalog     -40 to 85    
TLC5952 Order now Error Flag
Fault Detection
LED Open Detection
LED Short to Ground Detection
LED Short to VLED Detection
ON/OFF LED Driver
Power Good
Thermal Shutdown    		 128     35     1     HTSSOP | 32     32HTSSOP: 89 mm2: 8.1 x 11 (HTSSOP | 32)     Catalog     -40 to 85