UCC2570NG4

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The UCC2570NG4 is an integrated offline AC-DC converter IC (integrated circuit) specifically designed for use in household electronics and industrial applications. The device provides a complete solution for the reliable and efficient power conversion of AC input into DC output, and its integrated protection and control functions make it ideal for low power applications. This article will discuss the application field, working principle, and general features of the UCC2570NG4.

Application Field

The UCC2570NG4 protects and controls low power household appliances and industrial devices. It is suitable for applications such as AC/DC adapter, white goods, TV sets, and chargers for smart phones and other portable electronics. The device features an integrated buck converter, allowing for space-efficient design and enabling the implementation of complete, low cost AC/DC power supplies in small form factors. The UCC2570NG4 is designed to meet the requirements of EMC (electromagnetic compatibility) standards for designed for conducted and radiated interference.

Working Principle

The primary working principle of the UCC2570NG4 is to provide a complete solution for efficient power conversion from AC input to DC output. The device is made up of integrated circuits, providing power conversion with integrated control, protection and monitoring functions. The internal synchronous rectifier circuit ensures high power conversion efficiency, while the integrated safety function helps protect against over-temperature, over-voltage and short-circuit. During operation, the integrated pre-regulator section monitors the voltage and current of the source and supports over-current protection and standby power consumption reduction. The main rectifier block is composed of an high-side MOSFET, a low-side MOSFET, a fast PWM zero-voltage switching (ZVS) auto-reclosing function, and is capable of handling power levels up to 25W.

General Features

The UCC2570NG4 integrated AC-DC converter chip features high efficiency over the entire operating range. It is designed to reduce overall system costs and minimize development time, and has a wide input voltage range of 85-265VAC (or 64-296VAC). The chip integrates built-in protection features such as overtemperature protection, overvoltage protection and short-circuit protection. It also has an integrated variable off-time control, allowing for variable operating frequency and voltage control. The fast ZVS auto-reclosing function helps reduce power dissipation.

In summary, the UCC2570NG4 AC-DC converter chip is a complete solution for reliable and efficient power conversion of AC input into DC output. It is designed for low power applications such as AC/DC adapter, white goods, and chargers for portable electronics. The device integrates integrated protection and control functions, enabling space-efficient design and helping reduce system costs and development time. Its high efficiency over the entire operating range and built-in protection features make it ideal for low power applications.

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