STMicroelectronics VIPER12AS

The STMicroelectronics VIPER12AS is a monolithic power IC designed for low-cost switching applications such as power converters. It integrates the main components of a switch-mode power supply in a single package, including the high-voltage power MOSFET, a PWM controller, and an auxiliary circuit for various functions. Functions - High-Voltage Start-Up: The VIPER12AS can be powered directly from the AC line, eliminating the need for an external high-voltage start-up circuit. - Dimming and Control: The IC includes features for efficient control of output voltage and can support dimming applications. - Current Limiting: It provides overcurrent protection to prevent damage to the circuit during fault conditions. - Thermal Shutdown: If the chip overheats, it automatically shuts down to protect itself and the connected components. Applications - Flyback Converters: Commonly used in flyback topologies for AC-DC power converters. - Charger Circuits: Suitable for battery charger applications due to its low standby power consumption. - LED Drivers: Designed for driving LEDs in various configurations, with dimming capabilities. - Household Appliances: Used in appliances requiring efficient and reliable power supplies. Alternative Parts - VIPER11AS: A similar part with slightly lower performance specifications. - VIPER20: A higher-rated version with greater output power capability. - LNK304PN: From the LinkSwitch family, which offers an integrated solution for power converters. Embedded Modules The VIPER12AS can be integrated into power supply modules that could include: - PCB mounting modules for easy integration into existing designs. - Evaluation Boards to help developers assess performance and incorporate the VIPER12AS into their applications efficiently. Related Q&A 1. Q: What is the maximum output power of the VIPER12AS? A: The VIPER12AS typically supports output power up to 12 W, depending on the design and thermal management. 2. Q: Can the VIPER12AS be used for LED driver applications? A: Yes, the VIPER12AS is suitable for LED driver applications, offering features like dimming control and high efficiency. 3. Q: What protection features does the VIPER12AS offer? A: The VIPER12AS includes overcurrent protection, thermal shutdown, and under-voltage lockout features to enhance reliability. 4. Q: How does the VIPER12AS achieve high efficiency in power conversion? A: The VIPER12AS achieves high efficiency through its integrated high-voltage power MOSFET and optimized control circuitry designed for switch-mode power supply applications. 5. Q: What kinds of feedback systems can be used with VIPER12AS? A: The VIPER12AS can utilize both voltage feedback and current feedback systems, allowing it to maintain stable output during load changes.