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开关电源中的电阻和电容串联起来有那些作用？室外一体化电源机柜,高频开关电源，-48V开关电源回答：每部分的都有区别，在输入部分是用来吸收漏感尖峰的;在输出回路的是用来防止振铃产生造成输出纹波变大;在反馈回路是用来减小高频干扰增益防止输出电压不稳，同时也可避免振铃。其它信息： 按道理讲在输出端连接一个接地电容就可以起到去耦的作用了,为什么在并联一个电阻不知道？ - ------------------------------ 这种接法,常见于音频功放的输出负载处, 和SCR的保护. 实际是频率相关的阻抗器，用于吸收尖脉冲，平缓脉冲沿。因为，频率越高，阻抗越小，对很高的频率成份，阻抗就约等于那小电阻了。而对正常工作频率，阻抗并不小，所以并不会消耗了过多的有用功率。 在音频功放的输出处，由于喇叭的电感性，脉冲响应不好，容易出现高频杂音，此电路效果显著。
此回路常见于音频功放的输出级。其主要作用是高次谐波吸收和消自激振荡。因采用的是一个节点的网络，所以，此电路也只有一个极点。在实际应用时，R-C的值，决定了频率的吸收点，而电阻值则决定了吸收深度。对此，可参考阻-容振荡器中有关电阻-电容的选频原理部分
开关电源应用电路： Answer: there is a difference in each part. The input part is used to absorb the leakage peak; in the output circuit, it is used to prevent the ringing from producing the output ripple; the feedback loop is used to reduce the high frequency interference gain to prevent the output voltage instability and also to avoid the ringing. Other information: It is reasonable to say that connecting a grounding capacitor at the output can play a decoupling role. Why is it not possible to connect a resistor in parallel? - This method is commonly used in the output load of audio power amplifier and the protection of SCR. Actually, it is a frequency dependent impedance device, which is used to absorb sharp pulses and gentle pulse edges. Because the higher the frequency is, the smaller the impedance. For very high frequency components, the impedance is about equal to the small resistance. For normal working frequency, impedance is not small, so it does not consume too much useful power. At the output of the audio power amplifier, because of the electrical sensitivity of the horn, the impulse response is not good, and the high frequency noise is prone to occur. This circuit has a remarkable effect. This circuit is common in the output level of the audio power amplifier. Its main function is higher harmonic absorption and self excitation oscillation. Because there is a node network, so this circuit has only one pole. In practical applications, the value of R-C determines the absorption point of frequency, while the resistance value determines the depth of absorption. For this reason, reference to the frequency selective principle of resistance capacitance in resistance capacitance oscillator is possible. 通信电源,室内通信电源机柜,室外通信电源机柜,室外壁挂通信电源机柜,室内壁挂通信电源机柜,嵌入式通信电源系统,整流模块,监控模块,BBU,RRU,逆变器,室外一体化UPS电源,UPS不间断电源,48V50AH锂电池,蓄电池,蓄电池架,蓄电池柜,蓄电池巡检仪,蓄电池连接线, 交流配电单元,直流配电单元,交流配电箱, 局端嵌入式直流远供电源系统, 远端嵌入式直流远供电源系统 ,室外一体化电源机柜,高频开关电源，-48V开关电源 Switching power supply application circuit: |
