Features for the TLC5973
- Three Constant Sink Current Channels
- Current Capability:
- 2 mA to 35 mA per Channel (VCC ≤ 4.0 V)
- 2 mA to 50 mA per Channel (VCC > 4.0 V)
- Grayscale (GS) Control with PWM:
- 12-Bit (4096 Steps)
- Single-Wire Interface (EasySet)
- Power-Supply (VCC) Voltage Range:
- 3 V to 6 V
- OUT Pins Maximum Voltage: Up to 21 V
- Integrated Shunt Regulator
- Data Transfer Maximum Rate:
- Bits per Second (bps): 3 Mbps
- 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
Description for the TLC5973
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 LED driver provides 12-bit pulse width modulation (PWM) resolution. The display repeat rate is achieved at 2.9 kHz (typ) with an integrated 12-MHz grayscale (GS) clock oscillator. The driver also provides unlimited cascading capability.
All output sink constant currents can be set by an external resistor. The TLC5973 has an internal shunt regulator that can be used for higher VCC power-supply voltage applications.