LMR70503EVM/NOPB

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The Evaluation Board LMR70503EVM/NOPB is specifically designed to demonstrate the capabilities of the widely used LMR70503 SMPS Controller ICs. It provides information about the board’s circuit design, enabling engineers to test the features of the controller before selecting and building it into their final design.

Evaluation Boards - DC/DC & AC/DC (Off-Line) SMPS are used to convert direct current (DC) to an alternating current (AC) or vice versa. Typically such boards are used to create efficient power supply systems as they provide low output power ripple. The ability to work both offline and synchronous rectification make the Evaluation Board LMR70503EVM/NOPB a powerful option for design projects.

The LMR70503EVM/NOPB board has a wide range of applications since it can be used to create power supplies for various consumer electronics such as TVs, Hi-Fi systems, and gaming consoles. It is also suitable for use in industrial, medical and aerospace applications where precise power delivery is required.

The LMR70503EVM/NOPB has a circuit design that provides many features, some of which are discussed below:

• High efficiency: the LMR70503EVM/NOPB board has a high efficiency of more than 90%, which is achieved through the use of synchrectrified DC/DC conversion. This offers the benefit of lower power losses and reduced heat dissipation.

• Fault protection: The board has fault detection circuitry which stops the board in case of an over current or over voltage problem. This feature provides the board with longer operation lifetime and improved reliability.

• Output current adjustability: The LMR70503EVM/NOPB board features adjustable output current control, allowing for an accurate and stable output current, making it suitable for a range of applications.

• Operating frequency adjustment: The board has an adjustable operating frequency, making it suitable for a variety of applications.

• Over voltage protection: The board also has a built-in over voltage protection which prevents it from failing in extreme conditions.

The LMR70503EVM/NOPB evaluation board has two main components, the controller and the regulator, as illustrated in the schematic below. The regulator is used to convert the input voltage from the DC power supply to the desired output voltage. The controller is a specialized piece of circuitry designed to monitor the output voltage and adjust the internal parameters of the regulator accordingly. It operates by adjusting the duty cycle of the voltage regulator which in turn changes the output voltage.

The LMR70503 is designed to control the voltage regulator while maintaining the output voltage within the prescribed range. This is accomplished by using a feedback loop in which the controller monitors the output voltage and adjust the duty cycle of the voltage regulator accordingly.

The LMR70503EVM/NOPB evaluation board is well-suited for applications where high efficiency, high accuracy and excellent reliability are essential. Its adjustable operating frequency, wide input range and precise output voltage control mean that the board can be used for many applications. Additionally, the powerful fault protection features ensure that the board is not only reliable and efficient but also safe.

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