TOP255GN

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Power management integrated circuit (PMIC) technologies are essential in helping to manage the overall electrical performance of an electronic system, and there are a myriad of PMIC power management products available to designers today. TOP255GN offline switcher is one such example.

TOP255GN is an off-line PWM switch IC offering high efficiency, low standby power and outstanding reliability. It operates from a universal AC input 90-264 Vac and offers adjustable or fixed output voltage from 3.3V to 24V. With built-in features like cycle-by-cycle current limiting, thermal protection and automatic clamping circuit, TOP255GN can achieve a smooth and reliable power conversion over a wide range of line and load conditions.

TOP255GN is commonly used in all kinds of power supplies, especially for LED lighting systems. Its features and specifications make it an ideal choice for these types of applications, such as indicator lamps and light bulbs. In addition, TOP255GN can be used in many other applications such as personal electronics, machines, energy-efficient appliances, medical devices and automotive products, etc.

The working principle of TOP255GN is pretty straightforward. In order to provide power to the load, the input voltage is fed to the primary side of the transformer and converted into a lower alternating current (AC) voltage on the secondary side. The output voltage is then regulated by the error amplifier and optocoupler circuit. This voltage is compared to the reference voltage and then drives the power MOSFET. The switching of the MOSFET is then regulated by the pulse width modulation (PWM) signal so that the output voltage is kept at the appropriate level.

Moreover, the TOP255GN is equipped with a number of features and protections for improved reliability and safety. It includes input voltage UVLO (under voltage lockout) which detects and cuts off the input voltage below a certain threshold to prevent overloading the power supply. Also, it incorporates current-limiting and over-temperature shutdown capability to protect against faults and excessive heat. Furthermore, its internal clamping circuit allows even higher line voltages up to 420V to be safely handled, and its overvoltage protection (OVP) feature disables the power supply output when an overvoltage condition occurs.

TOP255GN is a high-performance PWM off-line switcher, offering a cost-effective solution for all kinds of AC/DC power conversion needs. Its features, such as cycle-by-cycle current limiting, thermal protection and automatic clamping circuit, make it suitable for a wide range of applications. In addition, its built-in protections and safety features all contribute to improved reliability and long-term, hassle-free operations.

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