MAX1771EVKIT-SO

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The MAX1771EVKIT-SO is an evaluation board for the MAX1771, a high-performance, high-frequency monolithic synchronous DC-DC converter. This board is used to evaluate power design as an off-line SMPS (switched-mode power supply). It is suitable for applications such as RF power amplifiers, battery charging circuits, voltage retiming, High-Speed Ethernet, and other general-purpose DC/DC applications.

MAX1771EVKIT-SO is supplied with a 0.25oz copper-clad Printed Circuit Board (PCB) and is designed to be connected to a 230V AC switch mode power input source. It functions as a high frequency DC/DC converter providing 3A continuous output current over an adjustable output voltage range of 0.9V to 5.5V. The board\'s circuit design includes a power transformer, power MOSFET, current mode PWM controller, and a shielded flyback core.

The device converts the AC input power into an average DC voltage, which is regulated by the power MOSFET. When the load is decreased, the average voltage is increased and when the load is increased, the average voltage is decreased. The average voltage control loop regulates the output voltage to maintain a certain average DC voltage. The device utilizes the current mode PWM controller for better current control, allowing it to maintain a constant voltage while operating low-power or high-current applications.

The MAX1771EVKIT-SO board has a total of two voltage selectors, with each selector being adjustable between 0.9V and 5.5V. The output voltage ranges from 0.9V to 5.5V, with an accuracy of ±2%. The board also has a load current indicator, which is used to monitor the amount of power being supplied by the device. This indicator is useful for debugging and monitoring of the device.

The MAX1771EVKIT-SO board also has a frequency adjust pot, which is used to adjust the switching frequency. The switching frequency of the device can be adjusted between 60kHz and 250kHz. It also has two enable/disable pins, which can be used to enable or disable the device. The board has an operating temperature range of -20°C to 85°C and is suitable for use in industrial, stero, and automotive applications.

In summary, the MAX1771EVKIT-SO board is an evaluation board for High-performance, High-frequency Monolithic synchronous DC-DC converters. It is used to evaluate power designs as an off-line SMPS (switched-mode power supply). The board can deliver 3A continuous output current over an adjustable output voltage range of 0.9V to 5.5V. It is featuring a load current indicator, two voltage selectors, two enable/disable pins, a frequency adjust pot, and an operating temperature range of -20°C to 85°C.

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