UCC35701PWTRG4

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PMIC or power management integrated circuits are the backbone of modern power system designs. They integrate critical components such as voltage regulators, switching regulators, and system protection circuits, into a single cohesive package. The UCC35701PWTRG4 is a part of this family, and focuses on the task of providing high efficiency, low noise AC-DC conversion solutions. In this article, we will discuss the application field and working principle of the UCC35701PWTRG4.

Application Field

The UCC35701PWTRG4 is an offline switcher designed for use in adapters, chargers, lighting systems, and any other application requiring high efficiency AC-DC conversion. This part uses integrated power MOSFETs in a flyback topology for power conversion up to 40W of output power. The UCC35701PWTRG4 provides a wide range of options for optimization of power conversion efficiency, noise, and size. By providing functions such as primary-side feedback, primary-side regulation, cycle-by-cycle current limit, user selectable frequency, and soft-start/restart, this part offers a high-performance, integrated solution with minimal external components.

Working Principle

The UCC35701PWTRG4 works based off of the flyback principle. Input power is rectified, and switched on and off with a high frequency switch inside the part. When the switch is “on,” the energy from the rectified AC current is stored in the primary side of the transformer. When the switch is “off,” the energy stored in the transformer is released, and is then rectified and regulated on the secondary side to give the desired output voltage. The frequency of the switching can be adjusted using the FREQ pin for optimization. In addition, the UCC35701PWTRG4 offers primary-side feedback, primary side regulation, and cycle-by-cycle current limit for further optimization and protection.

Conclusion

The UCC35701PWTRG4 is a high performance, high efficiency offline switcher rated up to 40W. It provides a wide range of features, such as integrated power MOSFETs, cycle-by-cycle current limit, and primary side feedback/regulation. By strategically adjusting the frequency of operation and other settings, the user can further optimize their design for maximized efficiency, noise levels, and power output. The UCC35701PWTRG4 is ideal for applications such as adapters, chargers, and lighting systems, and speaks to TI’s commitment to providing highly integrated and readily customizable solutions for power conversion.

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