开关电源电路原理

Principle of switching power supply circuit

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1
本文介绍了以电流控制型脉宽调制芯片uc 3842构成的开关电源的原理，分析了其保护电路的缺陷，并提出了一种改进的思路。
The paper introduces the principle of switch power which is composed by current control type PMW UC3842 and analyzes the shortage of protective circuit and proposes an improving idea.
2
研究了微机中具有代表性的半桥脉宽式开关电源的电路原理和特点，提出了简捷、合理的检修方法和步骤，以及关键测试点的经验数据和波形图。
The circuit principle and features of the typical half - bridge switching power source, the reasonable overhauling methods and steps and the key test data waveshapes in computer are discussed.
3
主要介绍医疗设备开关电源的电路原理与故障的检修方法。
Describes mainly the circuit principle of switch power supply for medical equipment and troubleshooting of common malfunctions.

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