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3-Channel, 12-Bit PWM Constant Current LED Driver


Package | PIN: D | 8
Temp: Q (-40 to 125)
Carrier: Partial Tube
Qty Price
1-9 $0.91
10-24 $0.82
25-99 $0.76
100-249 $0.66
250-499 $0.61
500-749 $0.51
750-999 $0.42
1000+ $0.38


  • Three Constant Sink Current Channels
  • Current Capability:
    • 2 mA to 35 mA per Channel (VCC ≤ 4.0V)
    • 2 mA to 50 mA per Channel (VCC > 4.0V)
  • Grayscale (GS) Control with PWM:
    • 12-Bit (4096Steps)
  • Single-Wire Interface (EasySet)
  • Power-Supply (VCC) Voltage Range:
    • 3 V to 6V
  • OUT Pins Maximum Voltage: Up to 21 V
  • Integrated Shunt Regulator
  • Data Transfer Maximum Rate:
    • Bits per Second (bps): 3Mbps
  • Internal GS Clock Oscillator: 12 MHz (typ)
  • Display Repeat Rate: 2.9 kHz (typ)
  • Output Delay Switching to Prevent Inrush Current
  • Unlimited Device Cascading
  • Operating Temperature: –40°C to 85°C

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Texas Instruments  TLC5973D

The TLC5973 is an easy-to-use,3-channel, 50-mA constant sink current LED driver. The single-wire,
3-Mbps serial interface (EasySet) provides a solution for minimizing wiring cost. The LEDdriver provides 12-bit pulse width modulation (PWM) resolution. The display repeat rate is achievedat 2.9 kHz (typ) with an integrated 12-MHz grayscale (GS) clock oscillator. The driver alsoprovides unlimited cascading capability.

All output sink constant currents can be set by an external resistor. The TLC5973 has aninternal shunt regulator that can be used for higher VCC power-supply voltage applications.