TOP256EN

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TOP256EN is a member of the TOPSwitch-GX family of integrated off-line switcher ICs. Developed by Power Integrations, TOP256EN offers a wide range of features and benefits that help system designers achieve performance and cost savings. The device is capable of providing up to 25 W of power conversion and is designed for use with a wide array of power systems, such as switching power supplies, AC-DC converters, and offline switching applications.

TOP256EN offers designers a low-cost and easy-to-use solution for many of their application design needs. LED drivers, adaptor applications, and motor control systems are examples of some of the AC/DC converter applications that can benefit from the use of the TOP256EN. Popular low-voltage applications like those used in consumer electronics and white goods such as washing machines, refrigerators and air conditioners are just a few application examples where TOP256EN can be effectively used.

TOP256EN offers a reliable and versatile solution to a variety of power supply design needs. The device has been tested and qualified according to a wide range of industry standards and is UL recognized. Its maximum power dissipation is 30 Watts, the operating temperature range is -40°C to +85°C and its 1.2 MHz operating frequency ensures high power efficiency and low power dissipation.

The internal circuitry of the TOP256EN includes an 850 V avalanche guaranteed avalanche-rated, high voltage power MOSFET, as well as an optically coupled feedback circuit. The feedback circuit allows the device to detect and regulate the output voltage according to a desired set point. Together with six additional internal protection circuits, including short-circuit, over-load, and over-temperature protection, TOP256EN offers superior protection from unexpected conditions or fault conditions.

TOP256EN can be connected to either a full-wave or a half-wave input rectification scheme, where the rectified sinusoidal input voltage is then used to drive a switching power stage. This switching power stage is connected to the load through a transformer and is referred to as a Flyback converter. The internal feedback circuit continuously monitors the output voltage and adjusts it accordingly. When the output voltage reaches the target set point, the device stops switching and thus shuts down the power stage.

The TOP256EN is designed with a variety of output configurations with adjustable outputs from 6 V to 57 V, and is capable of delivering up to 25 W of output power. The device is also capable of providing continuous or burst mode operation, and is designed with an on-chip device temperature sensing circuit.

In summary, TOP256EN is a highly integrated and easy-to-use off-line switcher IC which is well suited for a variety of AC/DC converter and offline switching applications. The device offers high power efficiency, low power dissipation, and six additional internal protection circuits. TOP256EN is an optimal solution for a range of application designs that require efficient and reliable performance.

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