TLC5944PWPRG4

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The TLC5944PWPRG4 is an LED driver integrated circuit (IC) with an adjustable 12-bit resolution current regulator, designed to drive up to 16 LED channels with a single I2C connection. The TLC5944PWPRG4 is a new generation of Power Rail-Green (PRG) devices, with an added dimming and color control capability. This makes the TLC5944PWPRG4 ideal for applications such as electronic billboards, LED light displays, and automotive lighting applications.

Features

The TLC5944PWPRG4 has a digitally programmable Constant Current Time (CCT), allowing for adjustable and variable light output. It also has a Programmable Power Save (PPS) function, allowing for an adjustable power save mode that can save up to 50 percent power when in use. The TLC5944PWPRG4 also has an independent fault detection and protection circuit, which can detect and protect the system from over-current, under-voltage and short-circuit conditions.

Application Fields

The TLC5944PWPRG4 has a wide range of applications. It can be used in electronic billboards, LED walls, vehicle headlamps, interior lighting systems, RGB lighting, and other lighting control applications. It can also be used in traffic control systems, projectors, architectural lighting, and LED stage lighting.

Working Principle

The TLC5944PWPRG4 uses a Constant Current Time (CCT) circuit to regulate the voltage and current of the LEDs. The CCT circuit is composed of an adjustable Multi-Level Converter, an I2C interface, an error amplifier, and an adjustable loop filter. The I2C interface provides the control and programming signals to the Multi-Level Converter, which determines the duty ratio of the output. The output of the Multi-Level Converter is coupled to the error amplifier, which compares the voltage of the output to the set reference voltage. The loop filter then filters out any residual ripple based on the response time of the circuit. The filtered signal is then compared to the reference voltage and Vout is adjusted accordingly.

Conclusion

The TLC5944PWPRG4 is an LED driver IC with an adjustable 12-bit resolution current regulator. It is ideal for applications such as electronic billboards, LED walls, vehicle headlamps, and interior lighting systems. The TLC5944PWPRG4 uses a Constant Current Time (CCT) circuit to regulate the voltage and current of the LEDs. The CCT circuit is composed of an adjustable Multi-Level Converter, an I2C interface, an error amplifier, and an adjustable loop filter. It has a programmable power save function and independent fault detection and protection circuit.

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