PT6881C

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DC DC converters are among the most versatile electrical components. They are used to convert direct current (DC) from one voltage level to another. The PT6881C is a single-phase chip DC DC converter designed to provide galvanic and thermal isolation between the input and output. It is a high efficiency and high performance device that operates up to 1MHz and can provide up to 30W power.

The PT6881C comprises two control chips - a driver chip and a power chip. The driver chip features all analog functions such as line and load regulation, and over-temperature protection. The power chip consists of two key components: a switching element and isolation magnetics. The switching element supplies input current to the output, while the isolation magnetics transfer energy from the input to the output. The isolated magnetic core is constructed of two layers of ferrite core material and provides the required galvanic isolation.

The PT6881C is designed for application fields such as communications, industrial, motor control and medical. It is ideal for a wide range of DC-DC converters, including single output and multiple outputs, isolated and non-isolated, and powered over wide input voltage ranges. It is also suitable for an extremely wide range of input and output voltages.

The working principle of the PT6881C is based on buck-boost technology. In this topology, the switching element is used to step down the input voltage, while the induced voltage in the isolation transformer helps to step up the voltage. When the voltage difference between the input and output exceeds a certain limit, the feedback circuit senses the change and switches the voltage level (buck and boost modes) to maintain the output voltage within a specified range. The PT6881C has an excellent line and load regulation capability, and it quickly adapts the output power to the changing conditions.

The PT6881C also has comprehensive protection features, such as over-current, over-voltage and under-voltage protect. It also features an over-temperature protection system, which shuts down the converter if the chip\'s temperature reaches a dangerously high level. It also has several additional features, such as an adjustable soft start, adjustable output voltage, adjustable switching frequency, power good signal, and high reliability.

The PT6881C is a highly efficient, cost-effective, and reliable DC DC converter designed to meet the needs of a wide range of applications. Its high performance, fast response time, and comprehensive protection features make it an ideal solution for industrial, medical, communications, and motor control applications.

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