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Overview of STMicroelectronics L6561D: The L6561D is a power factor corrector (PFC) controller IC from STMicroelectronics. It is designed to provide high power factor correction and accurate control of the input current. This IC operates in the continuous conduction mode (CCM) and is primarily used in switch-mode power supplies. Functions of STMicroelectronics L6561D: 1. Power Factor Correction: The L6561D ensures high power factor correction by dynamically adjusting the input current waveform to closely follow the input voltage waveform. 2. Accurate Control: It provides precise control over the input current, ensuring efficient use of power. 3. Overvoltage Protection: The IC includes integrated features to protect against overvoltage conditions and voltage spikes. 4. Feedback Loop Control: The L6561D includes a feedback loop for excellent load regulation and line regulation. Applications of STMicroelectronics L6561D: 1. Switch-mode Power Supplies: This IC is commonly used in power supplies for various applications such as office equipment, home appliances, LED lighting, and industrial equipment. 2. Uninterruptible Power Supplies (UPS): The high power factor correction capability of L6561D makes it suitable for UPS applications. 3. Motor Control: It can be used in motor control circuits to provide efficient power factor correction and accurate current control. Alternative Parts for L6561D: 1. ON Semiconductor NCP1605: This PFC controller IC offers similar features and performance to the L6561D. 2. Infineon Technologies ICE3B0365J: This IC is another alternative with power factor correction capabilities. 3. Texas Instruments UCC28070: It is a digital PFC controller IC suitable for high-performance power factor correction applications. Embedded Modules Supporting L6561D: 1. STMicroelectronics STEVAL-IAW001V1 Evaluation Board: This board includes the L6561D IC and the necessary components for evaluating its performance in a power factor correction application. 2. Power Integrations HVLED001A LED Driver Reference Design: An embedded module integrating the L6561D IC for LED lighting applications with power factor correction functionality. Related Q&A: 1. What are the advantages of using the L6561D power factor corrector over traditional PFC solutions? 2. Can the L6561D operate in discontinuous conduction mode (DCM)? 3. What are the key design considerations when using the L6561D in switch-mode power supply applications? 4. How does the L6561D provide overvoltage protection in power supply circuits? 5. Can the L6561D be used in three-phase power factor correction applications?