UCC28630DR

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The UCC28630DR is a primary side regulation quasi-resonant flyback controller designed to provide high levels of integration, while maximizing system efficiency, to reduce system cost and total footprint. This device offers an integrated MOSFET current sense, ultra-fast and accurate valley current-mode control and includes several additional features for compliance with safety regulations. With the integrated features of the UCC28630DR, system reliability is improved and power density is increased.

UCC28630DR is classified as PMIC - AC DC converters, offline switchers. It is used as a universal converter in home and office electrical appliances, such as microwave ovens, coffee makers, water heaters, fans, and more. This converter comprises a high-voltage for forward conversion and a low-voltage switch for flyback conversion. Its forward conversion provides power to drive loads which require a higher voltage, such as lamps or heaters, while its flyback converter provides the higher currents needed by the system.

The working principle of the UCC28630DR AC to DC converter is based on the Quasi-Resonant Primary-Side Control (QRPC) technique. The QRPC technique utilizes a high-voltage slewing driver which is integrated with a sensing and trip circuit to sense current and voltage of the output. Using this method, the controller can accurately regulate voltage by measuring current and voltage on the load side.

The UCC28630DR controller also utilizes an External Voltage Feedback (EVF) technique to allow for dynamic regulation of output voltage. With the EVF, the controller constantly monitors the output voltage and adjusts its flyback duty cycle to regulate the output voltage. It also includes an input voltage line protection to prevent over voltage conditions, and an integrated over temperature protection circuit for system safety.

The UCC28630DR controller offers a wide range of features for an efficient, robust and cost effective system solution. It supports a wide operating temperature range from -40°C to +105°C and ensures a wide input voltage range from 90 to 265V AC. It also supports a wide output voltage range from 3.2 to 55V DC. The controller has a few other features such as a high frequency of 65kHz and low switching losses, making it well suited for offline power supplies.

Overall, the UCC28630DR is a well integrated and highly effective controller for universal AC-DC powered applications. With its integrated features such as MOSFET current sense and valley current-mode control, it is a reliable and efficient choice for the offline power market. With a wide operating temperature range and input voltage range, the controller offers high levels of quality, reliability, and cost effectiveness to the users.

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