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What Are the General Classifications of Power Adapters?

At present, electronic instruments and equipment are more safe and reliable in performance, continuously enhanced in functions, and more and more automated in use. The continuous development of these electronic technologies and their applications is inseparable from power adapters. Power adapters have been widely used in computers, communications, aerospace, home appliances, etc., and there are more and more power adapter types. Do you know what are the classifications of power adapters?


1. Power adapters are classified according to the modulation method


(1) Pulse width modulation switching stabilized power adapter. The oscillating frequency remains unchanged, and the output voltage is changed and adjusted by changing the pulse width. Sometimes it is composed of a sampling circuit, a coupling circuit, etc., and a feedback closed loop is used to stabilize the amplitude of the output voltage.

(2) Frequency modulation switching stabilized power adapter. The duty cycle remains unchanged, and the amplitude of the output voltage is adjusted and stabilized by changing the oscillation frequency of the oscillator.

(3) Hybrid modulation switching stabilized power adapter. By adjusting the oscillation frequency of the conducting time, the amplitude of the output voltage can be adjusted and stabilized.


2. Power adapter is classified according to the excitation method


(1) Separately excited switching stabilized power adapter. There is an oscillator for the excitation signal in the circuit.

(2) Self-excited switching stabilized power adapter. The switch tube doubles as the oscillating tube in the oscillator.


3. Power adapter is classified according to the circuit structure


(1) Spare parts switching stabilized power adapter. The entire switching stabilized power adapter circuit is composed of discrete components, and its structure is complicated and its reliability is poor.

(2) Integrated circuit switching stabilized power adapter. The whole switching stabilized power adapter circuit or part of the circuit is composed of integrated circuits, which are usually thick film circuits. Some thick film integrated circuits include switching tubes, while others do not. The characteristics of this switching power adapter are simple circuit structure, convenient debugging and high reliability.

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