TLC5945PWP

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TLC5945PWP belongs to PMIC – LED drivers. It is an integrated circuit that provides highly efficient control for multiple light emitting diode (LED) arrays. It is designed for medium power general purpose applications, including emergency lighting and commercial lighting systems. TLC5945PWP integrates solutions for electrically and optically regulating the varying brightness of several channels with specific input power level. It provides functions such as brightness control, PWM control, thermal management, etc.

A TLC5945PWP application main field includes commercial lighting, industrial lighting, street lamps, and so on. Its integrated solutions offer solutions for controlling the intensity of 4-channel LEDs. It is designed using state-of-the-art technologies and integrates the entire internal logic of a 4-channel, high efficiency, constant current, over-temperature protected, openloop dimming system. It provides features like light sensing, temperature sensing, and over temperature protection that can be used in high power LED lighting systems. In addition, it has integrated open loop dimming function which makes it suitable for brightness changing applications.

The TLC5945PWP working principle is based on a buck-boost switching network and proprietary feedback control techniques to provide high efficiency and low power dissipation. The switching network consists of a fixed frequency buck-boost converter, a differential amplifier and four LED channels. The LED current is set by an external current sense resistor, and the LED voltage is set by the voltage divider feedback circuit. The differential amplifier compares the incoming voltage with the output of the voltage divider circuit, and then controls the output current accordingly.

The internal PWM generator provides a convenient method of dimming and regulating the intensity of the LEDs. The PWM generator is adjustable via external resistance for most applications. An on-chip driver MOSFET is also available for easy control of each channel’s current flow.

In addition to the PWM control, the TLC5945PWP also provides an adjustable thermal protection feature by sensing the ambient temperature and controlling the LED current to reduce the temperature. This feature can prevent over-heating in applications that require a high amount of power.

Overall, the TLC5945PWP is an excellent choice for medium power LED lighting applications. Its integrated solutions and features make it suitable for a wide range of applications, including commercial lighting, industrial lighting, and street lamps.

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