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BD7673AG-GTR application field and working principle

AC/DC Converters

AC/DC converters are one type of power management integrated circuit (PMIC), which convert alternating current (AC) to direct current (DC). The BD7673AG-GTR is a step-down (buck) mode AC/DC converter designed for embedded systems. It supports an input voltage of up to 26V DC and delivers a wide output voltage range of 3V to 28V DC. The maximum output current is 400mA, and the maximum switching frequency is 150kHz.

Features

The BD7673AG-GTR can be used in both constant voltage and constant current operation, making it suitable for a wide range of applications. Its built-in over-current and over-temperature protection features help protect the circuit from damage caused by surges or excessive heat. It also includes a soft-start function which helps provide a smooth transition between input and output voltage. In addition, it is also capable of synchronizing its output frequency to match the external clock.

Working Principle

The BD7673AG-GTR AC/DC converter utilizes a buck-boost switching configuration to efficiently convert the input voltage to a compatible output voltage. The integrated Pulse Width Modulation (PWM) system ensures that the output voltage remains within the set range. A diode bridge rectifier is used to convert the input AC voltage to a DC voltage, which is then fed into the main stepping regulator IC. The IC then regulates the output voltage by varying the duty cycle of the pulses applied to the power transistors. Finally, the output voltage is rectified and smoothed to the correct load voltage.

Applications

The BD7673AG-GTR AC/DC converter is suitable for a wide range of applications, such as embedded systems, electric toys, HVAC systems, portable communication devices and industrial automation. Additionally, it is suited for any application that requires a reliable power supply with a wide input voltage range and a wide output voltage range.

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