LM2754SQEV

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Evaluation Boards - LED Drivers technology has evolved to keep pace with the digital world, providing an alternative to can lighting that is energy efficient and cost effective, while also offering greater reliability and aesthetic allure. The LM2754SQEV is one of the most advanced LED drivers, delivering a high level of performance and features. The following will provide an overview of the LM2754SQEV application field and working principle.

Application Field

The LM2754SQEV is a highly integrated evaluation board for developing low-voltage, high-power LED applications. It features a low total parts count, high efficiency, and low standby current for power-aware designs. The board is ideal for applications such as street lighting, general lighting, and automotive lighting. The LM2754SQEV can support systems from 60-400W, with up to 32 channels. The maximum peak current output is 3A.

The evaluation board can be used with a variety of LED devices and offers a variety of programming options, such as a flexible PWM function and dimming control, adjustable boost peak current, and open-loop feedback current control. It also offers a variety of protection features, including short-circuit, undervoltage, and overvoltage protection, as well as over temperature protection.

Working Principle

The LM2754SQEV evaluation board consists of two main components: the controller and the synchronous buck converter. The controller is responsible for regulating the output of the LED string, and protecting it from possible faults. The synchronous buck converter is responsible for providing constant current to the LED string, ensuring excellent efficiency and power savings.

The controller operates in two modes: open loop and closed loop. In open loop mode, the controller sets the boost peak current according to the desired output current. In closed loop mode, the controller constantly monitors the output current and adjusts the boost peak current to maintain the desired output current. The controller also provides feedback control, allowing it to be specifically targeted for a variety of applications.

The synchronous buck converter consists of a controller, an inductor, and two switches. When the switch is turned on, the inductor stores energy, which is then delivered to the output via the two switches. The two switches are usually MOSFETs, and the converter operates in continuous conduction mode; the output voltage can be adjusted by controlling the duty cycle at which the two switches operate. The synchronous buck converter provides high efficiency and maintains a constant current over varying LED string lengths.

The LM2754SQEV evaluation board also provides several other features, such as various diagnostic and programming options, making it ideal for a variety of applications. It can be used with single- and multi-string LED configurations and is compatible with a wide range of LED types. With its high efficiency and low parts count, it provides an ideal solution for LED applications, while at the same time offering a high level of protection.

The LM2754SQEV evaluation board is a highly efficient and feature-rich LED driver that is suitable for a variety of LED applications. Its low parts count and high efficiency make it an ideal choice for applications in street lighting, general lighting, and automotive lighting. Its synchronous buck converter provides a constant current over varying LED string lengths, and its controller provides adjustable boost peak current, feedback current control, and a variety of protection features. The LM2754SQEV evaluation board is a great solution for LED applications and offers a high level of performance and features.

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