TPS54900PWR

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TPS54900PWR Application Field and Working Principle

Introduction

TPS54900PWR is a family of high-frequency DC-DC switching power converters that are developed for applications requiring ultra-high efficiency performance and extremely low noise. Configured as synchronous buck regulators and utilizing a 28 V power input, the fully integrated device provides up to 45 A with no component derating over a wide temperature range, making them ideal for cost-sensitive networking, telecommunications and computer applications.

Application field

The TPS54900PWR family is designed to provide a wide range of switching frequency and output voltage, making them suitable for many different applications. The common use cases of TPS54900PWR include:

• Notebooks, tablets and other portable devices
• Telecommunications equipment
• Networking gear (e.g. routers and switches)
• Enterprise servers
• Industrial and automotive applications

Working Principle

The TPS54900PWR family of devices operates according to the two-phase synchronous buck converter topology. As an constant on-time (COT) control method, the devices modulate the output voltage via a frequency modulated voltage regulator loop. This loop is based on a switching frequency that is modulated on the reference voltage, such that the switching frequency of the buck converter is inversely proportional to the output voltage.

The devices integrate an array of power switches and a dual phase controller, which makes the circuit suitable for low noise and high efficiency buck converter solutions. The device uses two output channels - a switch and a synchronous rectifier - and hence offer a high level of output current in a very small and cost-effective solution. The device also features voltage tracking across the two channels, ensuring no step changes when transitioning from light to heavy load operation.

Conclusion

The TPS54900PWR family is a highly efficient and low power solution for applications requiring high current, low noise and ultra-high efficiency. With its wide range of features, the family is suitable for a wide range of applications including notebooks, tablets, telecommunications equipment and industrial applications.

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