PT5821C

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DC DC Converters

DC-DC converters are devices that are used to convert the electrical energy from one DC voltage level to another. One of the most widely used DC-DC converters is the PT5821C. It is an adjustable and synchronous buck-boost converter with a wide input voltage range.

Application Field of PT5821C

The PT5821C is an ideal choice for a variety of applications where both a boost and buck configuration are needed. It can easily handle both step-up and step-down operations, as well as output voltage tracking and voltage regulation. The buck/boost capability of the PT5821C makes it a great solution for applications requiring input voltage conversion from one level to another, regardless of the original polarity. Additionally, the high input voltage range allows it to withstand up to 50V, making it the perfect choice for automotive, industrial, and other high voltage applications.

Working Principle of PT5821C

At its core, the PT5821C is a buck-boost converter, meaning that it can operate across a wide input voltage range from 18V to 50V. In buck mode, the top two switches (SWA and SWB) operate in parallel, allowing the converter to regulate and step down the input voltage. Similarly, in boost mode, the bottom two switches (SWB and SWC) operate in parallel, allowing the converter to boost the input voltage. The operating mode is determined by the operating frequency; in buck mode, the operating frequency will be below 30kHz, while in boost mode, the frequency will be above 30kHz.

The PT5821C is also able to provide a wide output voltage range from 0.9V-55V, making it an ideal solution for applications requiring input voltage conversion from one level to another, regardless of the original polarity. Additionally, its adaptive loop control and internal compensation structure allows for easy tracking and regulation of the output voltage, ensuring smooth and precise results.

Conclusion

The PT5821C is a widely used and highly reliable buck-boost converter that is suitable for a variety of applications. It combines a wide input voltage range of 18V-50V with a wide output voltage range of 0.9V-55V, ensuring that it can be used for a variety of different applications. Additionally, its adaptive loop control and internal compensation structure allows for easy tracking and regulation of the output voltage, ensuring smooth and precise results.

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