技术领域technical field
本实用新型涉及手机充电器。The utility model relates to a mobile phone charger.
背景技术Background technique
随着国家对家用电子产品安全的重视，国家对手机充电器的标准更严，同时现有很多充电器的效率不高，安全性低、容易短路。市场就出现了对高标准的手机充电器的需求。As the country attaches great importance to the safety of household electronic products, the country has stricter standards for mobile phone chargers. At the same time, many existing chargers are not efficient, safe, and easy to short circuit. There is a demand for high-standard mobile phone chargers in the market.
实用新型内容Utility model content
本实用新型的目的在于提供一种低成本、低功耗、高效率的手机充电器。The purpose of the utility model is to provide a mobile phone charger with low cost, low power consumption and high efficiency.
本实用新型的手机充电器，包括输入整流滤波电路、DC-DC变换电路、主控电路、电源电路、变压器、次级整流滤波电路、USB输出电路、电压控制电路。The mobile phone charger of the utility model includes an input rectification and filter circuit, a DC-DC conversion circuit, a main control circuit, a power supply circuit, a transformer, a secondary rectification and filter circuit, a USB output circuit, and a voltage control circuit.
输入整流滤波电路发送滤波信号至DC-DC变换电路。The input rectification filter circuit sends the filter signal to the DC-DC conversion circuit.
DC-DC变换电路发送开关变换信号至变压器。The DC-DC conversion circuit sends the switching conversion signal to the transformer.
变压器发送变压信号至次级整流滤波电路和电源电路。The transformer sends the transformed signal to the secondary rectification filter circuit and the power supply circuit.
次级整流滤波电路发送滤波信号至USB输出电路。The secondary rectification and filtering circuit sends the filtered signal to the USB output circuit.
USB输出电路发送电输出信号至电压控制电路。The USB output circuit sends an electrical output signal to the voltage control circuit.
电源电路与电压控制电路分别发送电源信号与控制信号至主控电路。The power supply circuit and the voltage control circuit respectively send a power supply signal and a control signal to the main control circuit.
主控电路发送控制信号至DC-DC变换电路。The main control circuit sends a control signal to the DC-DC conversion circuit.
本实用新型中的输入整流滤波电路将交流电变成直流电后输入DC-DC变换电路，DC-DC变换电路发挥稳流作用，控制功率，保护直流电路，稳流后的电压信号进入变压器后，由电能转为磁场能储存，再转变为电能，以不同的电压输进次级整流滤波电路，再一次转变成直流电，由USB输出电路输出稳定电压，实现对手机的充电，并且USB输出电路也将充电电压信号发送至电压控制电路，电压控制电路控制稳定的充电电压，向主控电路发送控制信号，主控电路检测电路中的电流信号与处理电压控制电路反馈来的电压信号后，向DC-DC变换电路发送控制信号，控制DC-DC变换电路进一步稳流稳压；同时，变压器转变电压后的信号发送至电源电路，电源电路对主控电路进行供电。本实用新型可实现给手机稳流稳压、高效率充电。The input rectification and filter circuit in the utility model converts the alternating current into direct current and then inputs it into the DC-DC conversion circuit. The DC-DC conversion circuit plays a role of stabilizing the current, controlling the power and protecting the DC circuit. After the stabilized voltage signal enters the transformer, it is The electric energy is converted into magnetic field energy storage, and then converted into electric energy, which is input into the secondary rectification filter circuit with different voltages, and then converted into direct current again, and the stable voltage is output by the USB output circuit to realize the charging of the mobile phone, and the USB output circuit will also be The charging voltage signal is sent to the voltage control circuit. The voltage control circuit controls the stable charging voltage and sends a control signal to the main control circuit. After the main control circuit detects the current signal in the circuit and processes the voltage signal fed back by the voltage control circuit, it sends to DC The DC conversion circuit sends a control signal to control the DC-DC conversion circuit to further stabilize the current and voltage; at the same time, the signal after the transformer transforms the voltage is sent to the power circuit, and the power circuit supplies power to the main control circuit. The utility model can realize stable current, voltage and high-efficiency charging for mobile phones.
在一些实施方式中，输入整流滤波电路包括外壳上的国标第一扁插脚L、国标第二扁插脚N、保险F1、X电容CX1、整流桥BD1、第一滤波电容C1、第二滤波电容C2、滤波电感L1，第一扁插脚L为相线输入与保险F1的一端相连；保险F1的另一端与整流桥BD1的第一输入端、X电容CX1的一端连接；整流桥BD1的另一输入端与国标第二扁插脚N及X电容CX1的另一端连接，其中N为零线；整流桥BD1的正极端与第一滤波电容C1、第二滤波电容C2、滤波电感L1组成的滤波电路的正极端连接；整流桥BD1的负极端与第一滤波电容C1、第二滤波电容C2、滤波电感L1组成的滤波电路的负极端连接。由此，交流电从两插脚输入后，通过整流桥BD1对其整流成脉动直流电，再经滤波电容和滤波电感，产生稳压的直流电，可为DC-DC变换电路的正常工作提供电源，同时，保险F1起到保护电路的作用，X电容CX1抑制充电器对电网的传导骚扰。In some embodiments, the input rectification and filtering circuit includes the first flat pin L of the national standard on the housing, the second flat pin N of the national standard, insurance F1, X capacitor CX1, rectifier bridge BD1, first filter capacitor C1, and second filter capacitor C2 , Filter inductor L1, the first flat pin L is the phase line input connected to one end of the insurance F1; the other end of the insurance F1 is connected to the first input end of the rectifier bridge BD1 and one end of the X capacitor CX1; the other input of the rectifier bridge BD1 The end is connected to the second flat pin N of the national standard and the other end of the X capacitor CX1, where N is the zero line; the positive end of the rectifier bridge BD1 is connected to the filter circuit composed of the first filter capacitor C1, the second filter capacitor C2, and the filter inductor L1 The positive terminal is connected; the negative terminal of the rectifier bridge BD1 is connected to the negative terminal of the filter circuit composed of the first filter capacitor C1, the second filter capacitor C2 and the filter inductor L1. Therefore, after the alternating current is input from the two pins, it is rectified into a pulsating direct current through the rectifier bridge BD1, and then a regulated direct current is generated through the filter capacitor and the filter inductor, which can provide power for the normal operation of the DC-DC conversion circuit. At the same time, The insurance F1 plays the role of protecting the circuit, and the X capacitor CX1 suppresses the conduction disturbance of the charger to the power grid.
在一些实施方式中，DC-DC变换电路包括MOS管Q1、电阻R6、电容C9、二极管D3组成的浪涌吸收电路，MOS管Q1的源极与变压器初级的同名端第二端口相连；MOS管Q1的栅极与主控电路连接；MOS管Q1的漏极与电流检测电阻R21的一端连接；浪涌吸收电路接在MOS管Q1的源极与滤波电路的正极端之间。由此，浪涌吸收电路可吸收浪涌电流和浪涌电流，MOS可稳定电压，它们可以将电能转换为磁场能贮存于变压器内，并利用变压器将磁场能转换为电能供给次级整流滤波电路。In some embodiments, the DC-DC conversion circuit includes a surge absorbing circuit composed of a MOS transistor Q1, a resistor R6, a capacitor C9, and a diode D3. The source of the MOS transistor Q1 is connected to the second port of the primary end of the transformer with the same name; the MOS transistor The gate of Q1 is connected to the main control circuit; the drain of MOS transistor Q1 is connected to one end of the current detection resistor R21; the surge absorbing circuit is connected between the source of MOS transistor Q1 and the positive terminal of the filter circuit. Therefore, the surge absorption circuit can absorb the surge current and the surge current, and the MOS can stabilize the voltage. They can convert the electric energy into magnetic field energy and store it in the transformer, and use the transformer to convert the magnetic field energy into electric energy for the secondary rectification filter circuit. .
在一些实施方式中，主控电路包括PMW调制器U1、电流检测电阻R21、高电压检测第十二电阻R12、高电压检测第十三电阻R13、启动第三电阻R3、启动第四电阻R4；启动第三电阻R3的一端与输入整流滤波电路的正极端连接，其另一端与启动第四电阻R4连接；启动第四电阻R4的另一端与PWM调制器U1相连；电流检测电阻R21检测到的电流信号由PWM调制器U1处理；PWM调制器U1同时还处理电压控制电路反馈来的电压信号。由此，通过PWM调制器U1自动调节脉冲占空比控制DC-DC变换电路的工作，控制通过MOS管Q1的电流，以免损坏MOS管，同时通过高电压检测第十二电阻R12、第十三R13监测变压器的工作，而启动第三电阻R3和启动第四电阻R4启动U1所用。In some embodiments, the main control circuit includes a PMW modulator U1, a current detection resistor R21, a high voltage detection twelfth resistor R12, a high voltage detection thirteenth resistor R13, a third startup resistor R3, and a fourth startup resistor R4; One end of the starting third resistor R3 is connected to the positive terminal of the input rectification filter circuit, and the other end is connected to the starting fourth resistor R4; the other end of the starting fourth resistor R4 is connected to the PWM modulator U1; the current detection resistor R21 detects The current signal is processed by the PWM modulator U1; the PWM modulator U1 also processes the voltage signal fed back from the voltage control circuit. Thus, the PWM modulator U1 automatically adjusts the pulse duty ratio to control the operation of the DC-DC conversion circuit, and controls the current passing through the MOS transistor Q1 to avoid damage to the MOS transistor. At the same time, the twelfth resistor R12 and the thirteenth resistor R13 monitors the operation of the transformer, and the third resistor R3 and the fourth resistor R4 are used to start U1.
在一些实施方式中，电源电路由输入端、整流滤波电路、稳压电路，其中整流滤波电路包括第四二极管D4和第五电容器C5，稳压电路包括第五电阻R5、第十电阻R10、第二三极管Q2、第三稳压管ZD3、第三电容C3；输入端即变压器反馈绕组同名端第四端口与整流滤波电路连接；整流滤波电路与稳压电路连接；稳压电路与主控电路连接。由此，变压器内的磁场能经绕组转为电能后，经电源电路内的整流滤波电路后转变为直流电源，再经稳压电路稳压，在主控电路启动工作后为PWM调制器U1提供工作电压。In some embodiments, the power supply circuit is composed of an input terminal, a rectification and filtering circuit, and a voltage stabilizing circuit, wherein the rectification and filtering circuit includes a fourth diode D4 and a fifth capacitor C5, and the voltage stabilizing circuit includes a fifth resistor R5 and a tenth resistor R10 , the second triode Q2, the third voltage regulator tube ZD3, the third capacitor C3; the input terminal is the fourth port of the transformer feedback winding with the same name connected to the rectifier filter circuit; the rectifier filter circuit is connected to the voltage regulator circuit; the voltage regulator circuit is connected to the voltage regulator circuit Main control circuit connection. Therefore, after the magnetic field energy in the transformer is converted into electrical energy through the winding, it is transformed into a DC power supply after passing through the rectification and filtering circuit in the power supply circuit, and then stabilized by the voltage stabilizing circuit. After the main control circuit starts to work, it provides Operating Voltage.
在一些实施方式中，变压器由初级绕组、次级绕组、反馈绕组组成，初级绕组同名端第二端口与DC-DC变换电路连接；初级绕组异名端第一端口与输入整流滤波电路连接；次级绕组同名端第五端口与次级整流滤波电路连接；反馈绕组同名端第四端口与电源电路连接。由此，变压器作为一个能量传输元件，它将DC-DC变换电路的电能转换成磁场能，然后将磁场能转换成电能释放于次级整流滤波电路。In some embodiments, the transformer is composed of a primary winding, a secondary winding, and a feedback winding. The second port of the same-named end of the primary winding is connected to the DC-DC conversion circuit; the first port of the different-named end of the primary winding is connected to the input rectification and filtering circuit; The fifth port of the same-named end of the primary winding is connected to the secondary rectification filter circuit; the fourth port of the same-named end of the feedback winding is connected to the power circuit. Therefore, the transformer acts as an energy transmission element, which converts the electrical energy of the DC-DC conversion circuit into magnetic field energy, and then converts the magnetic field energy into electrical energy and releases it to the secondary rectification and filtering circuit.
在一些实施方式中，次级整流滤波电路包括整流二极管D2、滤波电容C6，整流二极管D2的阳极与变压器次级绕组同名端第五端口连接，整流二极管D2的阴极与滤波电容C6的正极连接。由此，可以把变压器释放的磁场能转换成的电能转变成直流电。In some embodiments, the secondary rectification and filtering circuit includes a rectification diode D2 and a filter capacitor C6. The anode of the rectification diode D2 is connected to the fifth port of the transformer secondary winding with the same name, and the cathode of the rectification diode D2 is connected to the anode of the filter capacitor C6. Thus, the electrical energy converted from the magnetic field energy released by the transformer can be converted into direct current.
在一些实施方式中，USB输出电路包括USB、连接线，USB的第一端口与第四端口分别与次级整流滤波电路的正极、负极连接；连接线连接USB的第二端口与第三端口。由此，可以把次级整流滤波电路输出的直流电传输出去，以供手机充电。In some embodiments, the USB output circuit includes a USB and a connection line, the first port and the fourth port of the USB are respectively connected to the positive pole and the negative pole of the secondary rectification and filtering circuit; the connection line is connected to the second port and the third port of the USB. Thus, the direct current output from the secondary rectification and filtering circuit can be transmitted to charge the mobile phone.
在一些实施方式中，电压控制电路包括控制ICU2、电压取样第二十三电阻R23、电压取样第二十九电阻R29、信号光电传输电路U4；控制IC的U2与电压取样第二十三电阻R23、电压取样第二十九电阻R29、信号光电传输电路U4连接。由此，通过电压取样电阻对USB的输出电压取样，控制USB输出电路的输出电压，使其满足手机充电的需要。In some embodiments, the voltage control circuit includes a control ICU2, a voltage sampling twenty-third resistor R23, a voltage sampling twenty-ninth resistor R29, a signal photoelectric transmission circuit U4; U2 of the control IC and a voltage sampling twenty-third resistor R23 , the voltage sampling twenty-ninth resistor R29, and the signal photoelectric transmission circuit U4 are connected. Thus, the output voltage of the USB is sampled through the voltage sampling resistor, and the output voltage of the USB output circuit is controlled to meet the needs of charging the mobile phone.
在一些实施方式中，信号光电传输电路U4包括光电信号输出电路U4A和光电信号接收电路U4B，光电信号接收电路U4B与主控电路的PMW调制器U1连接，电压取样第二十三电阻R23、电压取样第二十九电阻R29对USB输出电压取样后发送取样电压至控制ICU2，控制ICU2把处理后的取样电压发送至光电信号输出电路U4A，光电信号输出电路U4A把取样电压的电信号转化为光信号发送至光电信号接收电路U4B，光电信号接收电路U4B将接收到的光信号转化为取样电压的电信号发送至主控电路中，由此，通过光电信号传输电路U4，利用光信号实现取样电压在电压控制电路与主控电路间传输。In some embodiments, the signal photoelectric transmission circuit U4 includes a photoelectric signal output circuit U4A and a photoelectric signal receiving circuit U4B, the photoelectric signal receiving circuit U4B is connected to the PMW modulator U1 of the main control circuit, the voltage sampling twenty-third resistor R23, the voltage The twenty-ninth sampling resistor R29 samples the USB output voltage and sends the sampling voltage to the control ICU2, and the control ICU2 sends the processed sampling voltage to the photoelectric signal output circuit U4A, and the photoelectric signal output circuit U4A converts the electrical signal of the sampling voltage into optical The signal is sent to the photoelectric signal receiving circuit U4B, and the photoelectric signal receiving circuit U4B converts the received optical signal into an electrical signal of a sampling voltage and sends it to the main control circuit, thus, through the photoelectric signal transmission circuit U4, the optical signal is used to realize the sampling voltage It is transmitted between the voltage control circuit and the main control circuit.
附图说明Description of drawings
图1为本实用新型手机充电器系统框图；Fig. 1 is a block diagram of the utility model mobile phone charger system;
图2为图1所示手机充电器的电路原理图。FIG. 2 is a circuit schematic diagram of the mobile phone charger shown in FIG. 1 .
具体实施方式Detailed ways
下面结合附图对本实用新型作进一步详细的说明。Below in conjunction with accompanying drawing, the utility model is described in further detail.
图1示意性地显示了本实用新型一种实施方式的手机充电器系统。Fig. 1 schematically shows a mobile phone charger system according to an embodiment of the present invention.
如图1所示，手机充电器包括输入整流滤波电路1、DC-DC变换电路2、主控电路3、电源电路4、变压器5、次级整流滤波电路6、USB输出电路7、电压控制电路8。输入整流滤波电路1发送滤波信号至DC-DC变换电路2；DC-DC变换电路2发送开关变换信号至变压器5；变压器5发送变压信号至次级整流滤波电路6和电源电路4；次级整流滤波电路6发送滤波信号至USB输出电路7；USB输出电路7发送电输出信号至电压控制电路8；电源电路4与电压控制电路8分别发送电源信号与控制信号至主控电路3，电源电路4给主控电路3供电，主控电路3控制DC-DC变换电路的开关变换；主控电路发送控制信号至DC-DC变换电路。As shown in Figure 1, the mobile phone charger includes an input rectification and filtering circuit 1, a DC-DC conversion circuit 2, a main control circuit 3, a power supply circuit 4, a transformer 5, a secondary rectification and filtering circuit 6, a USB output circuit 7, and a voltage control circuit. 8. The input rectification filter circuit 1 sends the filter signal to the DC-DC conversion circuit 2; the DC-DC conversion circuit 2 sends the switch conversion signal to the transformer 5; the transformer 5 sends the transformed signal to the secondary rectification filter circuit 6 and the power supply circuit 4; the secondary The rectification filter circuit 6 sends the filtered signal to the USB output circuit 7; the USB output circuit 7 sends the electrical output signal to the voltage control circuit 8; the power supply circuit 4 and the voltage control circuit 8 respectively send the power supply signal and the control signal to the main control circuit 3, and the power supply circuit 4 Supply power to the main control circuit 3, and the main control circuit 3 controls the switching conversion of the DC-DC conversion circuit; the main control circuit sends a control signal to the DC-DC conversion circuit.
图2示意性地显示了图1所示的手机充电器充电工作的电路原理。Fig. 2 schematically shows the working circuit principle of the mobile phone charger shown in Fig. 1 .
如图2所示，输入整流滤波电路1包括外壳上的国标第一扁插脚L第二扁插脚N、保险F1、X电容CX1、整流桥BD1、第一滤波电容C1、第二滤波电容C2、滤波电感L1，第一扁插脚L为相线输入与保险F1的一端相连；保险F1的另一端与整流桥的第一端口、X电容CX1的一端连接；整流桥BD1的另一输入端与国标第二扁插脚N及X电容CX1的另一端连接，其中，N为零线；整流桥BD1的正极端与第一滤波电容C1、第二滤波电容C2、滤波电感L1组成的滤波电路的正极端连接，整流桥BD1的负极端与由第一滤波电容C1、第二滤波电容C2、滤波电感L1组成的滤波电路的负极端连接。As shown in Figure 2, the input rectification and filtering circuit 1 includes the national standard first flat pin L and second flat pin N on the shell, insurance F1, X capacitor CX1, rectifier bridge BD1, first filter capacitor C1, second filter capacitor C2, Filter inductor L1, the first flat pin L is the phase line input and connected to one end of insurance F1; the other end of insurance F1 is connected to the first port of the rectifier bridge and one end of X capacitor CX1; the other input end of the rectifier bridge BD1 is connected to the national standard The second flat pin N is connected to the other end of the X capacitor CX1, where N is the neutral line; the positive end of the rectifier bridge BD1 is connected to the positive end of the filter circuit composed of the first filter capacitor C1, the second filter capacitor C2, and the filter inductor L1 connected, the negative terminal of the rectifier bridge BD1 is connected to the negative terminal of the filter circuit composed of the first filter capacitor C1, the second filter capacitor C2 and the filter inductor L1.
本实施例中，输入整流滤波电路是把90-264V的交流电变为高品质的直流电，为DC-DC变换电路提供高品质的直流电源。In this embodiment, the input rectification and filtering circuit converts the 90-264V AC power into high-quality DC power, and provides high-quality DC power for the DC-DC conversion circuit.
DC-DC变换电路2包括MOS管Q1、电阻R6、电容C9、二极管D3组成的浪涌吸收电路，MOS管Q1的源极与变压器初级的同名端第二端口相连；MOS管Q1的栅极与主控电路3连接；MOS管Q1的漏极与电流检测电阻R21的一端连接；浪涌吸收电路接在MOS管Q1的源极与滤波电路的正极端之间。MOS管Q1是“开关”工作形式，Q1的开关会使变压器初级产生浪涌电流和浪涌电压，浪涌吸收电路就是为了抑制这些浪涌电流和浪涌电压，避免Q1被浪涌电流和浪涌电压损坏。The DC-DC conversion circuit 2 includes a surge absorbing circuit composed of a MOS transistor Q1, a resistor R6, a capacitor C9, and a diode D3. The source of the MOS transistor Q1 is connected to the second port of the primary end of the same name of the transformer; the gate of the MOS transistor Q1 is connected to The main control circuit 3 is connected; the drain of the MOS transistor Q1 is connected to one end of the current detection resistor R21; the surge absorbing circuit is connected between the source of the MOS transistor Q1 and the positive terminal of the filter circuit. The MOS transistor Q1 is in the form of "switching". The switching of Q1 will cause surge current and surge voltage to be generated in the transformer primary. Surge voltage damage.
主控电路3包括PWM调制器U1、电流检测电阻R21、高电压检测第十二电阻R12、第十三电阻R13、第三启动电阻R3、第四启动电阻R4。第三启动电阻R3的一端与输入整流滤波电路1的正极端连接，其另一端与第四启动电阻R4连接；第四启动电阻R4的另一端与PWM调制器U1相连；电流检测电阻R21检测到的电流信号由PWM调制器U1处理；PWM调制器U1同时还处理电压控制电路8反馈来的电压信号。第三启动电阻R3和第四启动电阻R4在电路上电时为PWM调制器U1提供工作电流，启动完毕后，PWM调制器U1由电源电路供电，第三启动电阻R3、第四启动电阻R4不起作用，高电压检测第十二电阻R12、第十三电阻R13监测到变压器输出异常时，PWM调制器U1关闭，从而保护MOS管Q1、变压器5。The main control circuit 3 includes a PWM modulator U1, a current detection resistor R21, a high voltage detection twelfth resistor R12, a thirteenth resistor R13, a third startup resistor R3, and a fourth startup resistor R4. One end of the third start-up resistor R3 is connected to the positive end of the input rectification filter circuit 1, and the other end is connected to the fourth start-up resistor R4; the other end of the fourth start-up resistor R4 is connected to the PWM modulator U1; the current detection resistor R21 detects The current signal is processed by the PWM modulator U1; the PWM modulator U1 also processes the voltage signal fed back from the voltage control circuit 8. The third start-up resistor R3 and the fourth start-up resistor R4 provide working current for the PWM modulator U1 when the circuit is powered on. After the start-up is completed, the PWM modulator U1 is powered by the power supply circuit. When the high voltage detection twelfth resistor R12 and the thirteenth resistor R13 detect that the output of the transformer is abnormal, the PWM modulator U1 is turned off, thereby protecting the MOS transistor Q1 and the transformer 5 .
电源电路4包括输入端、由二极管D4与电容C5组成的整流滤波电路、由第五电阻R5、第十电阻R10、三极管Q2、稳压管ZD3和电容C3组成的稳压电路。输入端即变压器反馈绕组同名端第四端口与整流滤波电路连接；整流滤波电路与稳压电路连接；稳压电路与主控电路连接。变压器反馈绕组的输出电压经二极管D4整流与电容C5滤波后提供给稳压电路，稳压电路的关键元件是三极管Q2，第五电阻R5与第十电阻R10给稳压电路提供偏置电流，稳压管ZD3控制稳压电路的输出电压，稳压电路的输出电压经电容C3滤波后供给PWM调制器U1作为PWM调制器U1的工作电压。The power supply circuit 4 includes an input terminal, a rectifying and filtering circuit composed of a diode D4 and a capacitor C5, a voltage stabilizing circuit composed of a fifth resistor R5, a tenth resistor R10, a transistor Q2, a regulator diode ZD3 and a capacitor C3. The input end, that is, the fourth port of the same name end of the transformer feedback winding, is connected to the rectification and filtering circuit; the rectification and filtering circuit is connected to the voltage stabilizing circuit; the voltage stabilizing circuit is connected to the main control circuit. The output voltage of the transformer feedback winding is rectified by the diode D4 and filtered by the capacitor C5, and then supplied to the voltage stabilizing circuit. The key component of the voltage stabilizing circuit is the transistor Q2, and the fifth resistor R5 and the tenth resistor R10 provide the bias current for the voltage stabilizing circuit. The voltage regulator ZD3 controls the output voltage of the voltage stabilizing circuit, and the output voltage of the voltage stabilizing circuit is filtered by the capacitor C3 and supplied to the PWM modulator U1 as the working voltage of the PWM modulator U1.
变压器5由初级绕组、次级绕组、反馈绕组组成。初级绕组同名端第二端口与DC-DC变换电路2连接；初级绕组异名端第一端口与输入整流滤波电路1连接；次级绕组同名端第五端口与次级整流滤波电路连接6；反馈绕组同名端第四端口与电源电路4连接。变压器是能量传输器件，初级绕组将电能变成磁场能，次级绕组把磁场能变成电能并予以释放。Transformer 5 is composed of primary winding, secondary winding and feedback winding. The second port of the same name end of the primary winding is connected to the DC-DC conversion circuit 2; the first port of the same name end of the primary winding is connected to the input rectification filter circuit 1; the fifth port of the same name end of the secondary winding is connected to the secondary rectification filter circuit 6; The fourth port of the end with the same name of the winding is connected to the power circuit 4 . The transformer is an energy transmission device. The primary winding converts electrical energy into magnetic field energy, and the secondary winding converts magnetic field energy into electrical energy and releases it.
次级整流滤波电路6包括整流二极管D2、滤波电容C6。整流二极管D2的阳极与变压器次级绕组同名端第五端口连接，整流二极管D2的阴极与滤波电容C6的正极连接。D2将变压器次级绕组释放的脉冲电压进行整流，变成直流电，滤波电容C6将该直流电滤波变成平稳的直流电压。The secondary rectifying and filtering circuit 6 includes a rectifying diode D2 and a filtering capacitor C6. The anode of the rectifier diode D2 is connected to the fifth port of the transformer secondary winding with the same name, and the cathode of the rectifier diode D2 is connected to the positive electrode of the filter capacitor C6. D2 rectifies the pulse voltage released by the secondary winding of the transformer and turns it into DC, and the filter capacitor C6 filters the DC into a stable DC voltage.
USB输出电路7包括USB、连接线，USB的第一端口与第四端口分别与次级整流滤波电路6的正极、负极连接；连接线连接USB的第二端口与第三端口。USB把次级整流滤波电路输出的平稳直流电压输出，以供手机充电用，连接USB的第二端口与第三端口的连接线一般采用线路板铜箔直接连接。The USB output circuit 7 includes a USB and a connection line. The first port and the fourth port of the USB are respectively connected to the positive pole and the negative pole of the secondary rectification filter circuit 6; the connection line is connected to the second port and the third port of the USB. The USB outputs the stable DC voltage output by the secondary rectification and filtering circuit for charging the mobile phone. The connecting line connecting the second port and the third port of the USB is generally directly connected with the copper foil of the circuit board.
本实施例中，电压控制电路8包括控制IC的U2、电压取样第二十三电阻R23、第二十九电阻R29、信号光电传输电路U4，控制IC的U2与电压取样第二十三电阻R23、第二十九电阻R29、信号光电传输电路U4A连接。第二十三电阻R23、第二十九电阻R29取样USB输出电路7的输出电压后将取样电压送与控制IC的U2处理后，经信号光电传输电路U4传给PWM调制器U1，PWM调制器U1实时调节其控制脉冲的宽度，从而实现USB输出电压的稳定。In this embodiment, the voltage control circuit 8 includes U2 of the control IC, the twenty-third resistor R23 of voltage sampling, the twenty-ninth resistor R29, the signal photoelectric transmission circuit U4, U2 of the control IC and the twenty-third resistor R23 of voltage sampling , the twenty-ninth resistor R29, and the signal photoelectric transmission circuit U4A are connected. The twenty-third resistor R23 and the twenty-ninth resistor R29 sample the output voltage of the USB output circuit 7, and then send the sampled voltage to U2 of the control IC for processing, and then pass it to the PWM modulator U1 through the signal photoelectric transmission circuit U4, and the PWM modulator U1 adjusts the width of its control pulse in real time, so as to realize the stability of USB output voltage.
信号光电传输电路U4包括光电信号输出电路U4A和光电信号接收电路U4B，光电信号接收电路U4B与主控电路的PMW调制器U1连接，电压取样第二十三电阻R23、电压取样第二十九电阻R29对USB输出电压取样后发送取样电压至控制ICU2，控制ICU2把处理后的取样电压发送至光电信号输出电路U4A，光电信号输出电路U4A把取样电压的电信号转化为光信号发送至光电信号接收电路U4B，光电信号接收电路U4B将接收到的光信号转化为取样电压的电信号发送至主控电路中The signal photoelectric transmission circuit U4 includes a photoelectric signal output circuit U4A and a photoelectric signal receiving circuit U4B. The photoelectric signal receiving circuit U4B is connected to the PMW modulator U1 of the main control circuit. The voltage sampling twenty-third resistor R23 and the voltage sampling twenty-ninth resistor R29 samples the USB output voltage and sends the sampling voltage to the control ICU2, and the control ICU2 sends the processed sampling voltage to the photoelectric signal output circuit U4A, and the photoelectric signal output circuit U4A converts the electrical signal of the sampling voltage into an optical signal and sends it to the photoelectric signal receiver Circuit U4B, the photoelectric signal receiving circuit U4B converts the received optical signal into an electrical signal of sampling voltage and sends it to the main control circuit
本实用新型手机充电器是针对国标手机的充电方案，成本低、结构简单、效率高，具有过热、过流、短路等保护功能。The mobile phone charger of the utility model is a charging scheme aimed at the national standard mobile phone, has low cost, simple structure, high efficiency, and has protection functions such as overheating, overcurrent and short circuit.
以上所述的是本实用新型的一些实施方式。对于本领域的普通技术人员来说，在不脱离本实用新型创造构思的前提下，做出的若干变形和改进都属于本实用新型的保护范围。What have been described above are some embodiments of the present utility model. For those of ordinary skill in the art, on the premise of not departing from the inventive concept of the present utility model, some deformations and improvements made belong to the protection scope of the present utility model.
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201520609833.8UCN204858705U (en) | 2015-08-13 | 2015-08-13 | mobile phone charger |
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201520609833.8UCN204858705U (en) | 2015-08-13 | 2015-08-13 | mobile phone charger |
| Publication Number | Publication Date |
|---|---|
| CN204858705Utrue CN204858705U (en) | 2015-12-09 |
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201520609833.8UExpired - LifetimeCN204858705U (en) | 2015-08-13 | 2015-08-13 | mobile phone charger |
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| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CX01 | Expiry of patent term | Granted publication date:20151209 |