LM3150-750EVAL

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The LM3150-750EVAL evaluation board is a powerful tool for testing and research in the field of direct current (DC) to direct current (DC) and alternating current (AC) to direct current (DC) Switch Mode Power Supplies (SMPS). The purpose of this document is to provide an overview of the LM3150-750EVAL, its application fields and its working principle.

The LM3150-750EVAL evaluation board was developed to assess the performance of the LM3150 series, a controller IC specifically designed for DC/DC and AC/DC SMPS designs. It provides a conveniently testable platform to research and evaluate the performance of the LM3150. The LM3150 is an integrated circuit designed to provide a controlled increase or decrease in the DC voltage. It consists of an Control Loop, a Feedback Loop and a PWM Generator. The Control Loop senses the output voltage and forces the duty cycle of the switching element to achieve a desired output voltage. The Feedback Loop is responsible for detecting the actual output voltage and compares it to the intended output voltage, thereby transmitting the necessary information to the control loop in order to alter the duty cycle of the switching element.

The LM3150-750EVAL evaluation board was designed to provide high efficiency, low power losses in aircraft, automotive, and low power off line SMPS applications. It can operate in wide input voltage ranges from 30 VAC to 156 VDC, ideal for SMPS applications where the input voltage is highly variable. Additionally, the board provides numerous output voltage choices ranging from 4.5 VDC to 24 VDC, typically used in the field of communications and medical instrumentation. The board is capable of delivering up to 750 mA and over 90% peak efficiency, making it especially suitable for applications with high power demand.

The LM3150-750EVAL evaluation board has a wide range of features, making it highly useful for SMPS research and testing. The board is equipped with an on-board isolated power supply that provides a regulated voltage of 6 to 30 VDC, which is used to drive the controller IC. Additionally, the board includes an isolated voltage monitor feedback circuit, an adjustable output voltage selection input with soft-start, a logic programming input, and a logic sense input to monitor current or feedback. The board also contains an EMI filter, which helps to reduce EMI emissions, an on-board output power sensing circuit, and an output voltage trimming pin.

In terms of performance the board is capable of providing high efficiency even at peak power levels. The board includes an over-current and short circuit protection circuit, which will shut down the output power when tripped. Additionally, the board provides a wide input voltage range, allowing it to be used in various applications, and a wide output voltage selection rangeminimizing the need for voltage regulation. The board also incorporates an active frequency modulation, which adjusts the switching frequency in order to reduce peak switching losses.

The LM3150-750EVAL evaluation board is a valuable tool for research and development in the field of DC/DC and AC/DC SMPS. The board provides an ideal platform to study and evaluate the performance of the LM3150 controller IC, allowing for precise control over operating parameters such as load current, output voltage, and input voltage. It also incorporates features such as an adjustable output voltage selection, soft-start, output power sensing, as well as several protection circuits, making it ideal for research in the field of DC/DC and AC/DC SMPS applications.

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