VIPER011LS

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Power Management Integrated Circuits (PMICs) are a class of integrated circuits used for the efficient management and conversion of energy sources. As energy management systems become more powerful and complex, there is an increasing need for efficient and reliable power management circuitry. For system designers, one way to address this need is through the use of PMICs. VIPER011LS is an integrated PMIC from STMicroelectronics that integrates many of the functions necessary for offline applications, such as AC/DC converters, offline switchers and voltage references. The VIPER011LS integrates two different operating modes: the burst mode (BM) and the continuous conduction mode (CCM). These modes allow the designer to tailor the system performance according to the application requirements.The VIPER011LS features low power consumption, low EMI and output overvoltage protection. It is contained in a small, 8-pin package and has integrated protection features such as overvoltage, thermal shut-down, and undervoltage lock-out. Additionally, the VIPER011LS has an adjustable current limit, enabling designers to optimize for power efficiency. The VIPER011LS AC/DC converter is designed for a wide range of offline applications, such as power supplies for white goods, lighting, or industrial equipment. It is also used in a variety of commercial applications, including air conditioners, vending machines, and printers. The VIPER011LS application field and working principle is based on the Burst Mode (BM) and Continuous Conduction Mode (CCM) operation. In BM operation, the VIPER011LS switches the power transistor at a constant frequency (e.g. 100kHz) and with a fixed duty cycle, thus providing a constant output frequency and a controllable output voltage. The BM operation allows the internal oscillator to be synchronized with an external clock signal, thus providing greater stability and improved EMI performance.The VIPER011LS is an offline switcher, which works by operating in CCM when the load is light (e.g. below its selected peak current) and in BM when the load is heavy (e.g. above its selected peak current). This helps the VIPER011LS to achieve higher efficiency by operating in CCM at a reduced frequency. The VIPER011LS can also be configured to operate with hysteretic current regulation, thus improving the output voltage accuracy.To ensure reliable operation, the VIPER011LS has several protective functions such as overvoltage protection (OVP), overcurrent protection (OCP), and thermal protection (OTP). The OVP limits the output voltage to a safe level, protecting the converter from excessive load. The OCP ensures that the output current is kept within safe limits, and the OTP prevents the IC from overheating.In summary, the VIPER011LS from STMicroelectronics is a versatile, high-efficiency AC/DC converter and offline switcher. It is suitable for a wide range of applications, from white goods to commercial equipment. It features low power consumption, low EMI, integrated protection features, and adjustable current limit. Its BM and CCM operation allow system designers to tailor the system performance according to their application requirements.

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