Application of TOPSwitch?Ⅱ in voltage stabilization power supply

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Application of TOPSwitch?Ⅱ in voltage stabilization power supply [Copy link]

Abstract: TOPSwitch-II device is a new type of integrated chip that combines PWM/MOSFET. Using it to make high-frequency switching power supply can not only simplify the circuit, but also improve the electromagnetic compatibility performance of the power supply and reduce the production cost. This article introduces an experimental voltage-stabilized power supply made of TOP225Y. The circuit uses PWM technology and linear voltage-stabilization technology, with novel design and certain practical value.

Keywords: TOPSwitch device, single-ended flyback topology, PWM circuit, electromagnetic compatibility

When conducting circuit and single-chip microcomputer experiments, experimental voltage stabilizer is one of the necessary equipment. For this type of voltage stabilizer, the power capacity is not required to be very large, but there must be multiple sets of output voltages, among which it is best to have a set of output voltages that can be continuously adjusted to meet the needs of different occasions. There are many types of experimental voltage stabilizers on the market, but basically they all use power frequency linear voltage stabilization. Its advantages are simplicity, easy manufacturing, and low price, and its disadvantages are bulky and low efficiency. The use of high-frequency switching power supply is an effective way to overcome the above shortcomings, but the general high-frequency switching power supply circuit is complex, with more components and the production cost will also increase, so it is still rare to use high-frequency switching technology in experimental voltage stabilizer. However, the high-frequency switching power supply made of new devices such as TOPSwitch can make the circuit as simple as the power frequency linear voltage stabilizer, with excellent performance and much higher efficiency than the latter, and the cost will not increase significantly.