开关电源原理图
常见几种开关电源工作原理及电路图
常见几种开关电源工作原理及电路图图二开关电源基本电路框图开关式稳压电源的基本电路框图如图二所示。
交流电压经整流电路及滤波电路整流滤波后，变成含有一定脉动成份的直流电压，该电压进人高频变换器被转换成所需电压值的方波，最后再将这个方波电压经整流滤波变为所需要的直流电压。
控制电路为一脉冲宽度调制器，它主要由取样器、比较器、振荡器、脉宽调制及基准电压等电路构成。
这部分电路目前已集成化，制成了各种开关电源用集成电路。
控制电路用来调整高频开关元件的开关时间比例，以达到稳定输出电压的目的。
２．单端反激式开关电源单端反激式开关电源的典型电路如图三所示。
电路中所谓的单端是指高频变换器的磁芯仅工作在磁滞回线的一侧。
所谓的反激，是指当开关管VT1 导通时，高频变压器Ｔ初级绕组的感应电压为上正下负，整流二极管VD1处于截止状态，在初级绕组中储存能量。
当开关管VT1截止时，变压器Ｔ初级绕组中存储的能量，通过次级绕组及VD1 整流和电容Ｃ滤波后向负载输出。
单端反激式开关电源是一种成本最低的电源电路，输出功率为20－100Ｗ，可以同时输出不同的电压，且有较好的电压调整率。
唯一的缺点是输出的纹波电压较大，外特性差，适用于相对固定的负载。
单端反激式开关电源使用的开关管VT1 承受的最大反向电压是电路工作电压值的两倍，工作频率在20－200kHz之间。
３．单端正激式开关电源单端正激式开关电源的典型电路如图四所示。
这种电路在形式上与单端反激式电路相似，但工作情形不同。
当开关管VT1导通时，VD2也导通，这时电网向负载传送能量，滤波电感Ｌ储存能量；当开关管VT1截止时，电感Ｌ通过续流二极管VD3 继续向负载释放能量。
在电路中还设有钳位线圈与二极管VD2，它可以将开关管VT1的最高电压限制在两倍电源电压之间。
为满足磁芯复位条件，即磁通建立和复位时间应相等，所以电路中脉冲的占空比不能大于５０％。
由于这种电路在开关管VT1导通时，通过变压器向负载传送能量，所以输出功率范围大，可输出50－200 Ｗ的功率。
常见几种开关电源工作原理及电路图
一、开关式稳压电源的根本工作原理开关式稳压电源接控制方式分为调宽式和调频式两种，在实际的应用中，调宽式使用得较多，在目前开发和使用的开关电源集成电路中，绝大多数也为脉宽调制型。
因此下面就主要介绍调宽式开关稳压电源。
调宽式开关稳压电源的根本原理可参见下列图。
对于单极性矩形脉冲来说，其直流平均电压Uo取决于矩形脉冲的宽度，脉冲越宽，其直流平均电压值就越高。
直流平均电压Ｕ。
可由公式计算，即Uo=Um×T1/T式中Um为矩形脉冲最大电压值；T为矩形脉冲周期；T1为矩形脉冲宽度。
从上式可以看出，当Um 与T 不变时，直流平均电压Uo 将与脉冲宽度T1 成正比。
这样，只要我们设法使脉冲宽度随稳压电源输出电压的增高而变窄，就可以到达稳定电压的目的。
二、开关式稳压电源的原理电路1、根本电路图二开关电源根本电路框图开关式稳压电源的根本电路框图如图二所示。
交流电压经整流电路及滤波电路整流滤波后，变成含有一定脉动成份的直流电压，该电压进人高频变换器被转换成所需电压值的方波，最后再将这个方波电压经整流滤波变为所需要的直流电压。
控制电路为一脉冲宽度调制器，它主要由取样器、比拟器、振荡器、脉宽调制及基准电压等电路构成。
这局部电路目前已集成化，制成了各种开关电源用集成电路。
控制电路用来调整高频开关元件的开关时间比例，以到达稳定输出电压的目的。
２．单端反激式开关电源单端反激式开关电源的典型电路如图三所示。
电路中所谓的单端是指高频变换器的磁芯仅工作在磁滞回线的一侧。
所谓的反激，是指当开关管VT1 导通时，高频变压器Ｔ初级绕组的感应电压为上正下负，整流二极管VD1处于截止状态，在初级绕组中储存能量。
当开关管VT1截止时，变压器Ｔ初级绕组中存储的能量，通过次级绕组及VD1 整流和电容Ｃ滤波后向负载输出。
单端反激式开关电源是一种本钱最低的电源电路，输出功率为20－100Ｗ，可以同时输出不同的电压，且有较好的电压调整率。
唯一的缺点是输出的纹波电压较大，外特性差，适用于相对固定的负载。
开关电源制作设计(电路原理图+PCB)
一、工作原理我们先熟悉一款开关电源的工作原理，该电源可输出5V电压，如图1所示。
1. 抗干扰电路在电网输入端首先设置一个NTC5D-9负温度系数热敏电阻，作用是保护后面的整流桥，刚开机时热敏电阻处于冷态，阻值比较大，可以限制输入电流，正常工作时，电阻比较小。
这样对开机时的浪涌电流起到有效的缓冲作用。
电容CY1、CY2、CY3、CY4用以滤除从工频电网上进入开关稳压电源和从开关稳压电源进入工频电网的不对称杂散信号，电容CX1、CX2用以滤除从工频电网上进入开关稳压电源和从开关稳压电源进入工频电网的对称杂散信号，用电感L1抑制从工频电网上进入开关稳压电源和从开关稳压电源进入工频电网的频率相同、相位相反的杂散干扰电流信号。
采用高频特性好的瓷片电容和铁芯电感，实现开关稳压电源电路中的高频辐射不污染工频电网和工频电网上的杂散电磁波不会窜入开关稳压电源电路中而干扰和影响其工作，对高频分量或工频的谐波分量具有急剧阻止通过功能，而对于几百赫兹以下的低频分量近似一条短路线。
图1 开关电源的工作原理图2. 整流滤波电路在电路中D1、D2、D3、D4组成全桥整流电路，把输入的交流电压进行全波整流，然后用C1进行滤波，最后变成直流输出供电电压，为后级的功率变换器供电，整流滤波后的电压约为300V。
3. UC3842供电与振荡300V的脉动直流电压，此电压经R12降压后给C4充电，供电UC3842的7脚，当C4的电压达到UC3842的启动电压门槛值时，UC3842开始工作并提供驱动脉冲，由6脚输出推动开关管工作。
一旦开关管工作，反馈绕组的能量经过D6整流，C4滤波，又供电到UC3842的7脚，这时可以不需要R12的启动了。
C9、R11接UC3842的定时端，和内部电路构成振荡电路，振荡的工作频率计算为：f=1.8/（Rt*Ct）代入数据可计算工作频率：f=68.18K4. 稳压电路该电路主要由精密稳压源T L 4 3 1 和线性光耦P C 8 1 7 组成，假设输出电压↑→经过R 1 6 、R 1 9 、R20、RES3的取样电压↑→TL431的1脚电压↑，当该脚电压大于TL431的基准电压2.5V时，TL431的2、3脚导通，→通过光电耦合到UC3842的2脚，于是UC3842的6脚驱动脉冲的占空比↓→开关变压器T1绕组上的能量↓→输出电压↓，达到稳压作用；反之，假设输出电压下降，则稳压过程与上相反。
开关电源各模块原理实图讲解
开关电源各模块原理实图讲解————————————————————————————————作者：————————————————————————————————日期：防雷单元 EMI电路 整流、滤波 功率变换 整流、滤波 输出PFC单元输入过欠压保护单元PWM短路保护取样输出过压保护控制器限流保护稳压环路开关电源电路方框图输入滤波、整流回路原理图CASE NMOV2FDGC3F1MOV1LF2MOV3C1L1C2C6C5C7RT1R2BRG1GNDR1C4+F3L2防雷单元整流、滤波电磁干扰滤波器（EMI）开关电源原理一、 开关电源的电路组成：开关电源的主要电路是由输入电磁干扰滤波器（EMI ）、整流滤波电路、功率变换电路、PWM 控制器电路、输出整流滤波电路组成。
辅助电路有输入过欠压保护电路、输出过欠压保护电路、输出过流保护电路、输出短路保护电路等。
开关电源的电路组成方框图如下：二、 输入电路的原理及常见电路：1、AC 输入整流滤波电路原理：① 防雷电路：当有雷击，产生高压经电网导入电源时，由MOV1、MOV2、MOV3：F1、F2、F3、FDG1组成的电路进行保护。
当加在压敏电阻两端的电压超过其工作电压时，其阻值降低，使高压能量消耗在压敏电阻上，若电流过大，F1、F2、F3会烧毁保护后级电路。
② 输入滤波电路：C1、L1、C2、C3组成的双π型滤波网络主要是对输入电源的电磁噪声及杂波信号进行抑制，防止对电源干扰，同时也防止电源本身产生的高频杂波对电网干扰。
当电源开启瞬间，要对C5充电，由于瞬间电流大，加RT1（热敏电阻）就能有效的防止浪涌电流。
因瞬时能量全消耗在RT1电阻上，一定时间后温度升高后RT1阻值减小（RT1是负温系数元件），这时它消耗的能量非常小，后级电路可正常工作。
③ 整流滤波电路：交流电压经BRG1整流后，经C5滤波后得到较为纯净的直流电压。
若C5容量变小，输出的交流纹波将增大。
开关电源原理及原理图
金星D2902、D2912等机型的电源采用了三根公司的电源厚膜块STR-S6708，该电源具有适应电网电压宽（90V-270V）、保护电路完善、外围元件少等特点，该电路能改变开关电源脉冲宽度，在待机时采用窄脉冲方式工作，在正常开机时采用宽脉冲方式工作，因而无须另设待机时的辅助电源。
开关电路振荡过STR-S6708的（9）脚是电源供应脚，只有（9）脚供电正常，厚膜电路才会正常工作。
VD908从220V交流电上直接整流，经R903、R917限流、C909滤波后得到8V左右的直流电压，加到IC901的（9）脚，IC901开始工作，开关电源开始振荡，由VD908整流得到的电压能量较小，不能维持IC901的正常工作，但是当开关电源开始振荡后，开关变压器T901的（V2）脚将输出电压，经VD903整流、C909滤波后可得到稳定的8V电压，向IC901供电。
光有VD903整流后的电压仍然是不行的，因为当电视机进入待机状态时，整机的主电压将从127V下降到30V左右，此时，开关变压器的（V2）脚输出电压也将大幅度下降，经VD903整流后的电压根本达不到8V，这时就要靠V901这一回路来继续维持供电了。
在正常开机状态，开关变压器的（V3）脚输出电压，经VD902整流、C908滤波后得到约45V左右的直流电压，加到V901的C极，但是，由于这时的V901的发射极电压为8V，而基极接有稳压管VD920，VD920的稳压值是7.2V，所以V901的基极电压比发射极电压低，V901不会导通，IC901的（9）脚供电由VD903提供。
当整机进入待机状态时，开关变压器的（V3）脚输出电压经VD902整流后的到11V左右的电压，此时，由于VD903输出的电压很低，V901得到正偏开始导通，其发射极输出电压为6.7V左右，继续为IC901的（9）脚提供电源。
V901回路的另一个作用是，当电网电压降低时，VD903整流后的电压也将降低，当降低到6.6V以下时，V901会导通，继续向STR-S6708的（9）脚供电，所以，这种开关电源适应电网电压的范围很宽。
开关电源工作原理分析及图解
开关电源工作原理分析及图解
开关电源就是用通过电路控制开关管进行高速的导通与截止。
将直流电转化为高频率的交流电提供给变压器进行变压，从而产生所需要的一组或多组电压！转为高频交流电的原因是高频交流在变压器变压电路中的效率要比50HZ高很多．所以开关变压器可以做的很小，而且工作时不是很热！！成本很低．如果不将50HZ变为高频那开关电源就没有意义。
开关电源的工作流程是：
电源→输入滤波器→全桥整流→直流滤波→开关管（振荡逆变）→开关变压器→输出整流与滤波。
交流电源输入经整流滤波成直流
通过高频PWM（脉冲宽度调制）信号控制开关管，将那个直流加到开关变压器初级上。
常见几种开关电源工作原理及电路图
开关式稳压电源接控制方式分为调宽式和调频式两种，在实际的应用中，调宽式使用得较多，在目前开发和使用的开关电源集成电路中，绝大多数也为脉宽调制型。
因此下面就主要介绍调宽式开关稳压电源。
调宽式开关稳压电源的基本原理可参见下图。
对于单极性矩形脉冲来说，其直流平均电压Uo取决于矩形脉冲的宽度，脉冲越宽，其直流平均电压值就越高。
直流平均电压Ｕ。
可由公式计算，即Uo=Um×T1/T式中Um为矩形脉冲最大电压值；T为矩形脉冲周期；T1为矩形脉冲宽度。
从上式可以看出，当Um 与T 不变时，直流平均电压Uo 将与脉冲宽度T1 成正比。
这样，只要我们设法使脉冲宽度随稳压电源输出电压的增高而变窄，就可以达到稳定电压的目的。
二、开关式稳压电源的原理电路1、基本电路图二开关电源基本电路框图开关式稳压电源的基本电路框图如图二所示。
交流电压经整流电路及滤波电路整流滤波后，变成含有一定脉动成份的直流电压，该电压进人高频变换器被转换成所需电压值的方波，最后再将这个方波电压经整流滤波变为所需要的直流电压。
控制电路为一脉冲宽度调制器，它主要由取样器、比较器、振荡器、脉宽调制及基准电压等电路构成。
这部分电路目前已集成化，制成了各种开关电源用集成电路。
控制电路用来调整高频开关元件的开关时间比例，以达到稳定输出电压的目的。
２．单端反激式开关电源单端反激式开关电源的典型电路如图三所示。
电路中所谓的单端是指高频变换器的磁芯仅工作在磁滞回线的一侧。
所谓的反激，是指当开关管VT1 导通时，高频变压器Ｔ初级绕组的感应电压为上正下负，整流二极管VD1处于截止状态，在初级绕组中储存能量。
当开关管VT1截止时，变压器Ｔ初级绕组中存储的能量，通过次级绕组及VD1 整流和电容Ｃ滤波后向负载输出。
单端反激式开关电源是一种成本最低的电源电路，输出功率为20－100Ｗ，可以同时输出不同的电压，且有较好的电压调整率。
唯一的缺点是输出的纹波电压较大，外特性差，适用于相对固定的负载。
400W开关电源原理图
AN983/DA Simplified Power Supply Design Using the TL494Control CircuitPrepared by: Jade H. Alberkrack ON Semiconductor Bipolar IC DivisionThis bulletin describes the operation and characteristics of the TL494 SWITCHMODE t V oltage Regulator and shows its application in a 400–watt off–line power supply.The TL494 is a fixed–frequency pulse width modulation control circuit, incorporating the primary building blocks required for the control of a switching power supply. (See Figure 1). An internal linear sawtooth oscillator is frequency–programmable by two external components, R T and C T . The oscillator frequency is determined by:f osc ^ 1.1R T @C TOutput pulse width modulation is accomplished by comparison of the positive sawtooth waveform across capacitor C T to either of two control signals. The NOR gates,which drive output transistors Q1 and Q2, are enabled only when the flip–flop clock–input line is in low state. Thishappens only during that portion of time when the sawtooth voltage is greater than the control signals. Therefore, an increase in control–signal amplitude causes a corresponding linear decrease of output pulse width. (Refer to the timing diagram shown in Figure 2).The control signals are external inputs that can be fed into the dead–time control (Figure 1, Pin 4), the error amplifier inputs (Pins 1, 2, 15, 16), or the feedback input (Pin 3). The dead–time control comparator has an effective 120 mV input offset which limits the minimum output dead time to approximately the first 4% of the sawtooth–cycle time. This would result in a maximum duty cycle of 96% with the output mode control (Pin 13) grounded, and 48% with it connected to the reference line. Additional dead time may be imposed on the output by setting the dead–time control input to a fixed voltage, ranging between 0 to 3.3 V .Figure 1. TL494 Block DiagramThis document may contain references to devices which are no longer offered. Please contact your ON Semiconductor representative for information on possible replacement devices.APPLICATION NOTEFigure 2. TL494 Timing DiagramCapacitor CFeedback/P The pulse width modulator comparator provides a means for the error amplifiers to adjust the output pulse width from the maximum percent on–time, established by the dead–time control input, down to zero, as the voltage at the feedback pin varies from 0.5 to 3.5 V . Both error amplifiers have a common mode input range from –0.3 V to (V CC –2V), and may be used to sense power supply output voltage and current. The error amplifier outputs are active high and are ORed together at the inverting input of the pulse width modulator comparator. With this configuration, the amplifier that demands minimum output on time, dominates control of the loop.When capacitor C T is discharged, a positive pulse is generated on the output of the dead–time comparator, which clocks the pulse steering flip–flop and inhibits the output transistors, Q1 and Q2. With the output mode control connected to the reference line, the pulse–steering flip–flop directs the modulated pulses to each of the two output transistors alternately for push–pull operation. The output frequency is equal to half that of the oscillator. Output drive can also be taken from Q1 or Q2, when single–ended operation with a maximum on–time of less than 50% is required. This is desirable when the output transformer has a ringback winding with a catch diode used for snubbing.When higher output drive currents are required for single–ended operation, Q1 and Q2 may be connected in parallel, and the output mode control pin must be tied to ground to disable the flip–flop. The output frequency will now be equal to that of the oscillator.The TL494 has an internal 5 V reference capable of sourcing up to 10 mA of load currents for external bias circuits. The reference has an internal accuracy of ±5% witha thermal drift of less than 50 mV over an operating temperature range of 0 to 70°C.APPLICATION OF THE TL494 IN A 400 OFF–LINE POWER SUPPLYA 5 V , 80 A line operated 25 kHz switching power supply,designed around the TL494, is shown in Figure 3, and the performance data is shown in Table 1. A brief explanation of each section of the power supply is as follows:AC Input SectionThe operating ac line voltage is selectable for nominal of 115 or 230 volts by moving the jumper links to their appropriate positions. The input circuit is a full wave voltage doubler when connected for 115 V AC operation with both halves of the bridge connected in parallel for added line–surge capability. When connected for 230 V AC operation, the input circuit forms a standard full wave bridge.The line voltage tolerance for proper operation is –10,+20% of nominal. The ac line inrush current, during power up, is limited by resistor R1. It is shorted out of the circuit by triac Q1, only after capacitors C1 and C2 are fully charged,and the high frequency output transformer T1, commences operation.Power SectionThe high frequency output transformer is driven in a half–bridge configuration by transistors Q3 and Q5. Each transistor is protected from inductive turn–off voltage transients by an R–C snubber and a fast recovery clamp rectifier. Transistors Q2 and Q4 provide turn–off drive to Q3and Q5, respectively. In order to describe the operation of Q2, consider that Q6 and Q3 are turned on. Energy iscoupled from the primary to the secondary of T3, forward biasing the base–emitter of Q3, and charging C3 through CR1. Resistor R3 provides a dc path for the ‘on’ drive after C3 is fully charged. Note that the emitter–base of Q2 is reverse biased during this time. Turn–off drive to Q3 commences during the dead–time period, when both Q6 and Q7 are off. During this time, capacitor C3 will forward bias the base–emitter of Q2 through R3 and R2 causing it to turn on. The base–emitter of Q3 will now be reverse biased by the charge stored in C3 coupled through the collector–emitter of Q2.Output SectionThe ac voltage present at the secondaries of T1 is rectified by four MBR 6035 Schottky devices connected in a full wave center tapped configuration. Each device is protected from excessive switching voltage spikes by an R–C snubber, and output current sharing is aided by having separate secondary windings. Output current limit protection is achieved by incorporating a current sense transformer T4. The out–of–phase secondary halves of T1 are cross connected through the core of T4, forming a 1–turn primary. The 50 kHz output is filtered by inductor L1, and capacitor C4. Resistor R4 is used to guarantee that the power supply will have a minimum output load current of 1 ampere. This prevents the output transistors Q3 and/or Q5 from cycle skipping, as the required on–time to maintain regulation into an open circuit load is less than that of the devices storage time. Transformer T5 is used to reduce output switching spikes by providing common mode noise rejection, and its use is optional.The MC3423, U1, is used to sense an overvoltage condition at the output, and will trigger the crowbar SCR, Q8. The trip voltage is centered at 6.4 V with a programmed delay of 40 m s. In the event that a fault condition has caused the crowbar to fire, a signal is sent to the control section via jumper ‘A’ or ‘B.’ This signal is needed to shut down the output, which will prevent the crowbar SCR from destruction due to over dissipation. Automatic over voltage reset is achieved by connecting jumper ‘A’. The control section will cycle the power supply output every 2 seconds until the fault has cleared. If jumper ‘B’ is connected, SCR Q12 will inhibit the output until the ac line is disconnected. Low Voltage Supply SectionA low current internal power supply is used to keep the control circuitry active and independent from external loading of the output section. Transformer T2, Q9 and CR2 form a simple 14.3 V series pass regulator.Control SectionThe TL494 provides the pulse width modulation control for the power supply. The minimum output dead–time is set to approximately 4% by grounding Pin 4 through R5. The soft start is controlled by C5 and R5. Transistor Q11 is used to discharge C5 and to inhibit the operation of the power supply if a low ac line voltage condition is sensed indirectly by Q10, or the output inhibit line is grounded.Error amplifier 1 and 2 are used for output voltage and current–level sensing, respectively. The inverting inputs of both amplifiers are connected together to a 2.5 V reference derived from Pin 14. By connecting the two inputs together, only one R–C feedback network is needed to set the voltage gain and roll off characteristics for both amplifiers. Remote output voltage sensing capability is provided, and the supply will compensate for a combined total of 0.5 V drop in the power busses to the load. The secondary of the output current sense transformer T4, is terminated into 36 W and peak detected by BR1 and C6. The current limit adjust is set for a maximum output current of 85 amperes.The oscillator frequency is set to 50 kHz by the timing components R T and C T. This results in a 25 kHz two phase output drive signal, when the output mode (Pin 13) is connected to the reference output (Pin 14).Table 1. 400 Watt Switcher Performance DataFigure 3. 400 Watt Switchmode Power SupplyTransformer DataT1Core:Bobbin:Windings:Ferroxcube EC 70–3C8, 0.002″ gap in each legFerroxcube 70PTBPrimary (Q3, Q5):Primary (Q1):Secondary, 4 each:Shield, 2 each:50 turns total, #17 AWG Split wound about secondary.4 turns, #17 AWG.3 turns, #14 AWG Quad Filar wound.Made from soft alloy copper 0.002″ thick.T2Core:Bobbin:Windings:Allegheny Ludlum EI–75–M6, 29 gaugeBobbin Cosmo EI 75Primary, 2 each:Secondary:1000 turns, #36 AWG.200 turns, #24 AWG.T3Core:Windings:Ferroxcube 846 T250–3C8Primary, 2 each:Secondary, 2 each:30 turns, #30 AWG Bifilar wound.12 turns, #20 AWG Bifilar wound.T4Core:Windings:Magnetics Inc. 55059–A2Primary, 2 each:Secondary:1 turn, #14 AWG Quad Filar wound. Taken from secondary to T1.500 turns, #30 AWG.T5Core:Windings:Magnetics Inc. 55071–A2Primary:Secondary:4 turns, #16 AWG Hex Filar wound.4 turns, #16 AWG Hex Filar wound.L1Core:Windings:TDK H7C2 DR 56 x 355 turns, soft alloy copper strap, 0.9″ wide x 0.020″ thick,6 m H.SWITCHMODE is a trademark of Semiconductor Components Industries, LLC.ON Semiconductor and are registered trademarks of Semiconductor Components Industries, LLC (SCILLC). SCILLC reserves the right to make changes without further notice to any products herein. SCILLC makes no warranty, representation or guarantee regarding the suitability of its products for any particular purpose, nor does SCILLC assume any liability arising out of the application or use of any product or circuit, and specifically disclaims any and all liability, including without limitation special, consequential or incidental damages. “Typical” parameters which may be provided in SCILLC data sheets and/or specifications can and do vary in different applications and actual performance may vary over time. All operating parameters, including “Typicals” must be validated for each customer application by customer’s technical experts. SCILLC does not convey any license under its patent rights nor the rights of others.SCILLC products are not designed, intended, or authorized for use as components in systems intended for surgical implant into the body, or other applications intended to support or sustain life, or for any other application in which the failure of the SCILLC product could create a situation where personal injury or death may occur. Should Buyer purchase or use SCILLC products for any such unintended or unauthorized application, Buyer shall indemnify and hold SCILLC and its officers, employees, subsidiaries, affiliates, and distributors harmless against all claims, costs, damages, and expenses, and reasonable attorney fees arising out of, directly or indirectly, any claim of personal injury or death associated with such unintended or unauthorized use, even if such claim alleges that SCILLC was negligent regarding the design or manufacture of the part. SCILLC is an Equal Opportunity/Affirmative Action Employer. PUBLICATION ORDERING INFORMATIONJAPAN: ON Semiconductor, Japan Customer Focus Center2–9–1 Kamimeguro, Meguro–ku, Tokyo, Japan 153–0051Phone: 81–3–5773–3850Email: r14525@。
开关电源工作原理图文
开关电源的组成部分
开关电源由输入滤波器、整流器、变压器、开关管、控制电路等多个组件构 成。每个组件在电源系统中发挥着关键的作用，确保电源正常运行。
开关电源的工作过程
开关电源的工作过程可以分为开关管导通和关断两个状态。通过控制开关管 的导通时间比例，可以调整输出电压的大小和稳定性。
开关电源的发展趋势和前景
随着科技的发展，开关电源的功率密度、效率、可靠性等性能得到不断提升。 未来开关电源将更加小型化、高效化，并适应更多应用场景。
开关电源的优点和应用领域
开关电源具有高效、稳定、紧凑的特点，广泛应用于通信、计算机、工业自动化等领域。它为电 子设备提供可靠的电源支持，提升了系统性能和可靠性。
开关电源的常见问题与解决方 法
开关电源在使用过程中可能、加强屏蔽等方法来解决。
开关电源工作原理图文
开关电源是一种能够对输入电源进行高效转换和稳定输出的电源系统。它由 多个组件组成，采用特定的工作原理，广泛应用于各种电子设备中。
开关电源的概述
开关电源是现代电子设备中最常用的电源类型之一。它通过采用高频开关器 件来转换输入电源到所需的输出电压，提供稳定、高效的能量转换。
开关电源的基本工作原理