LM5576BLDT/NOPB

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The LM5576BLDT/NOPB is an evaluation board designed to illustrate the performance of the LM5576 integrated circuit. This evaluation board is designed for use as an off-line switch mode power supply (SMPS) and is classified as belonging to the Evaluation Boards - DC/DC & AC/DC (Off-Line) SMPS category. This article discusses the application field and working principle of the LM5576BLDT/NOPB.

The LM5576BLDT/NOPB is used as a single-ended primary-indexed (SEPIC) regulator with a maximum load current of 1.2A. This evaluation board is based on the monolithic LM5576 integrated circuit, which is a 200KHz non-synchronous buck-boost converter with 1.2A IOUT capability. The LM5576 features an input voltage range of 2.2V to 16V and an output voltage range of 0.8V to 16V, making it an ideal solution for powering low-voltage systems from low-voltage supplies.

The LM5576BLDT/NOPB includes a preset V OUT voltage of 5V which can be adjusted via the onboard potentiometer. It also includes an external bootstrap capacitor and an external catch diode to enhance both input and output line transient immunity. Furthermore, the LM5576BLDT/NOPB features a soft-start circuit to reduce inrush current on start up, and an adjustable soft-stop feature to prevent overshoot at full load. Finally, the LM5576BLDT/NOPB provides over-temperature protection, output over-voltage protection, short-circuit protection, input under-voltage lock-out, and output current limit protection.

The LM5576BLDT/NOPB is an ideal solution for a wide range of applications, including automotive, consumer electronics, industrial appliances, white goods, and lighting systems. It is capable of driving resistive, capacitive, and inductive loads accepting an input voltage range of 2.2V to 16V. This makes it perfect for applications where wide input voltage ranges are encountered. Furthermore, the LM5576BLDT/NOPB can be used in applications that require tight regulation, such as wireless station equipment and other telecom equipment.

The working principle of the LM5576BLDT/NOPB is based on buck-boost topology. The LM5576 integrated circuit includes three high-side switches, three low-side switches, and a diode. The input voltage is compared to a fixed reference voltage to control the oscillator. The oscillator then drives the high-side and low-side switches which, in turn, either charge or discharge a storage capacitor, generating the output voltage. This continuous cycle can be adjusted via the onboard potentiometer to provide the desired output voltage.

In summary, the LM5576BLDT/NOPB is an evaluation board designed for use as an off-line switch mode power supply (SMPS). It is classified as belonging to the Evaluation Boards - DC/DC & AC/DC (Off-Line) SMPS category. The LM5576BLDT/NOPB is used as a single-ended primary-indexed (SEPIC) regulator with a maximum load current of 1.2A. It is capable of driving resistive, capacitive, and inductive loads and features a number of protections, such as over-temperature protection, output over-voltage protection, short-circuit protection, input under-voltage lock-out, and output current limit protection. The working principle of the LM5576BLDT/NOPB is based on buck-boost topology and includes a preset V OUT voltage that can be adjusted via the onboard potentiometer. The LM5576BLDT/NOPB is ideal for use in a wide range of applications, including automotive, consumer electronics, industrial appliances, white goods, and lighting systems.

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