TOP256MG

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Power Management Integrated Circuit (PMIC) is one of the most important components for modern electronic products. In recent years, with the rapid development of portable electronic products, even higher integration and higher efficiency are required for PMIC. TOP256MG is such an ideal solution for small, portable power system.

TOP256MG belongs to the AC DC Converters, Offline Switchers category of PMIC. Its operating frequency is adjustable in the range of 0~550KHz, which can provide better system efficiency and smaller size than traditional fixed frequency converters. It is suitable for a wide voltage range, including AC90-265V, DC380-550V input and its output is adjustable in the range of 10-25V.

TOP256MG uses hysteretic constant-current control, to improve the power factor and stability of the converter. It provides 1.2A rated output current, low power consumption (50mW in no-load condition, and 80mW in light load condition). It also provides protection functions like over-temperature/short-circuit/over-current/voltage/load protection.

TOP256MG is mainly used in industrial lighting, electronic instrumentation, electronic products, communication system, industrial and civil illumination, etc. Its excellent performance, great durability and superior system efficiency make it one of the most important components in today’s most power systems.

The working principle of TOP256MG mainly consists of two parts - Power Factor Correction (PFC) and Voltage Regulator Control (VRC). The PFC part is used to improve the power factor and reduce harmonic current. It also control the current though the resistors, so that the input power is accurately transformed into an appropriate amount of output. The VRC part is mainly used to adjust the output voltage. It uses a feedback voltage comparator and an error amplifier to compare the output voltage and the reference voltage, and then regulates the output voltage by controlling the duty cycle.

In conclusion, TOP256MG is a highly integrated AC DC converters, offline switchers PMIC that offers excellent performance, stability, and system efficiency for power systems. It is widely used in the market, and a reliable and efficient component for the most demanding applications.

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