Switching regulated power supply circuit

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There are many ways to classify voltage regulators; based on the type of output power, they can be divided into DC voltage regulators and AC voltage regulators； Based on the connection method between the voltage regulation circuit and the load, there are series voltage regulation power supplies and parallel voltage regulation power supplies ； Based on the operating mode of the regulating tube, there are linear voltage regulators and switching voltage regulators ； Classified by circuit type, there are simple voltage regulators and feedback-type voltage regulators, etc. With so many different classification methods, circuits also vary. Next, a technician from Zhonggang Yangsheng will share with you how the circuit of a switching regulated power supply is structured. 　　In terms of control methods, switch-mode voltage regulators are divided into pulse-width modulation and frequency modulation types. In practical applications, pulse-width modulation is more commonly used, and the vast majority of switch-mode power supply integrated circuits currently under development and in use are also of the pulse-width modulation type. Both volume and weight have been significantly reduced, offering the advantages of small size and high efficiency. This switching circuit has been widely used in various electronic devices. Although the linear voltage regulator based on the aforementioned linear voltage regulation circuit features a simple circuit structure and reliable operation, it has disadvantages such as low efficiency (only 30%-50%), large size, high consumption of copper and iron, high operating temperature, and a narrow adjustment range. To address the issue of high power consumption in linear voltage regulators, switching voltage regulators were developed. Switching regulators can achieve conversion efficiencies of 60% to over 85%, and they eliminate the need for a power-frequency transformer as well as the complex basic circuitry of large switching voltage regulators. After being rectified and filtered by the rectifier circuit and filter circuit, the alternating voltage is converted into a direct current voltage with certain pulsation components. This voltage then enters the high-frequency converter where it is transformed into a square wave with the desired voltage value, and finally this square wave voltage is again rectified and filtered to produce the required direct current voltage. The control circuit is a pulse width modulator, which is primarily composed of a sampler, a comparator, an oscillator, pulse width modulation circuits, and a reference voltage source. This part of the circuit has now been integrated, resulting in various integrated circuits for switching power supplies. The control circuit is used to adjust the switching time ratio of the high-frequency switching elements in order to achieve a stable output voltage. That’s all for the discussion on the circuits of switch-mode voltage regulators. At present, the technology behind switch-mode voltage regulators is still not very mature, which is why their use in everyday applications is limited. If anyone needs to purchase a switch-mode voltage regulator, it is advisable to learn more about Zhonggang Yangsheng voltage regulators.