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The STMicroelectronics VIPER22AS is a highly integrated switched-mode power converter that operates in the primary side of offline AC/DC converters. It is designed for a wide range of applications including power adapters, chargers, and auxiliary power supplies. Functions: - Primary-side regulation. - PWM controller with integrated high-voltage startup. - Integrated MOSFET for power switching. - Overvoltage and overload protections. - Frequency jitter for low EMI. Applications: - Power adapters. - Chargers. - Auxiliary power supplies. - LED lighting drivers. - Household appliances. Alternative Components: - ON Semiconductor NCP1014. - Infineon ICE2QS03G. - Texas Instruments UCC28630. Embedded Modules: - Voltage regulator. - PWM controller. - Overvoltage protection circuit. - MOSFET for power switching. Related Q&A 1. What is the efficiency of the VIPER22AS in power conversion applications? - The VIPER22AS offers high efficiency, typically above 85%, making it suitable for energy-efficient power supply designs. 2. How does the overvoltage protection feature of the VIPER22AS work? - The VIPER22AS monitors the output voltage and shuts off the power conversion process if the voltage exceeds a safe threshold, helping to protect connected devices. 3. Can the VIPER22AS be used in dimmable LED lighting applications? - Yes, the VIPER22AS can be employed in LED lighting drivers, including dimmable designs, thanks to its primary-side regulation capabilities. 4. What are the key advantages of using the VIPER22AS in power adapter designs? - The VIPER22AS offers a compact and cost-effective solution with integrated components, simplifying the design process and reducing overall system complexity. 5. How does the frequency jitter feature of the VIPER22AS help in reducing electromagnetic interference (EMI)? - By modulating the operating frequency slightly, the frequency jitter helps spread out the EMI spectrum, making it easier to comply with regulatory standards for electromagnetic compatibility.