CN202978387U - Simple charger circuit - Google Patents

Abstract

The simple charger circuit is characterized by comprising a commercial power input line, a primary side rectifying and filtering circuit, a switching conversion circuit and a secondary side output rectifying and filtering circuit which are sequentially connected from input to output, wherein the switching conversion circuit comprises a switching tube Q1 and a primary side and a secondary side of a transformer T1, the switching tube Q1 outputs to the primary side of the transformer T1, the charger circuit further comprises a primary side feedback control circuit, the primary side feedback control circuit comprises a feedback winding of the transformer T1 and a PSR chip U1, the feedback winding is connected to the input end of the switching conversion circuit, and the PSR chip U1 outputs a control signal to the switching tube Q1 according to the feedback of the feedback winding. The utility model discloses need not opto-coupler feedback circuit, need not the adjustable reposition of redundant personnel reference source TL431 of three-terminal, component is small in quantity, and the integrated level is high, the production of being convenient for.

Description

Translated fromChinese

简易型充电器电路Simple charger circuit

技术领域technical field

本实用新型涉及充电器电路。The utility model relates to a charger circuit.

背景技术Background technique

通常市面上出现的小功率充电器种类繁多，其电路方案基本为使用RCC自激振荡式或PWM控制芯片的反激式电路，广泛用于家用电器、玩具、手机电池等充电设备中。现有的一种PWM控制式充电器，由市电输入线路、一次侧整流滤波、开关变换线路、二次侧输出整流滤波、PWM芯片控制电路、二次侧光耦反馈电路和输出稳压比较放大线路等组成。Generally, there are many types of low-power chargers on the market. The circuit scheme is basically a flyback circuit using RCC self-oscillating or PWM control chips, which are widely used in charging equipment such as household appliances, toys, and mobile phone batteries. An existing PWM-controlled charger is composed of mains input line, primary side rectification filter, switch conversion circuit, secondary side output rectification filter, PWM chip control circuit, secondary side optocoupler feedback circuit and output voltage stabilization comparison Amplifying lines and so on.

在当今经济高速发展、科技突飞猛进的形势下，材料成本和人力成本面临巨大的压力，现有的充电器电路生产需求上还是存在着电路较为复杂，元件数量较多的问题。Under the current situation of rapid economic development and rapid technological advancement, material costs and labor costs are facing enormous pressure. The existing charger circuit production requirements still have the problem of relatively complex circuits and a large number of components.

发明内容Contents of the invention

本实用新型提供一种使用具有PSR芯片(原边反馈控制芯片)的简易型充电器电路，无需光耦反馈电路、无需三端可调分流基准源TL431，元件数量少，集成度高，便于生产。The utility model provides a simple charger circuit using a PSR chip (primary side feedback control chip), which does not need an optocoupler feedback circuit, and does not need a three-terminal adjustable shunt reference source TL431. The number of components is small, the integration is high, and it is convenient for production. .

为此给出简易型充电器电路，其特征是，包括从输入到输出依次连接的市电输入线路、一次侧整流滤波电路、开关变换电路和二次侧输出整流滤波电路，开关变换电路包括开关管Q1和变压器T1的原边和副边，开关管Q1输出到变压器T1的原边，充电器电路还包括原边反馈控制电路，原边反馈控制电路包括变压器T1的反馈绕组和PSR芯片U1，反馈绕组连接到开关变换电路的输入端，PSR芯片U1根据反馈绕组的反馈向开关管Q1输出控制信号。To this end, a simple charger circuit is given, which is characterized in that it includes a mains input line connected sequentially from input to output, a primary side rectification filter circuit, a switch conversion circuit and a secondary side output rectification filter circuit, and the switch conversion circuit includes a switch Tube Q1 and the primary side and secondary side of the transformer T1, the switching tube Q1 outputs to the primary side of the transformer T1, the charger circuit also includes the primary side feedback control circuit, the primary side feedback control circuit includes the feedback winding of the transformer T1 and the PSR chip U1, The feedback winding is connected to the input end of the switching conversion circuit, and the PSR chip U1 outputs a control signal to the switching tube Q1 according to the feedback of the feedback winding.

本实用新型的有益效果是无需光耦反馈电路、无需三端可调分流基准源TL431，元件数量少，集成度高，便于生产。The beneficial effect of the utility model is that no optocoupler feedback circuit and three-terminal adjustable shunt reference source TL431 are needed, the number of components is small, the integration degree is high, and the production is convenient.

附图说明Description of drawings

图1是简易型充电器电路的原理框图。Figure 1 is a functional block diagram of a simple charger circuit.

图2是简易型充电器电路的电路图。Figure 2 is a circuit diagram of a simple charger circuit.

具体实施方式Detailed ways

充电保护后零功耗的原边反馈（PSR）控制式充电器用于IPHONE手机充电及其它电池充电设备，如图1，市电输入线路10与一次侧整流滤波电路20连接，一次侧整流滤波电路20与开关变换电路40连接，开关变换电路40一路与二次侧整流滤波电路50连接，另一路又与原边反馈控制电路30连接，二次侧整流滤波电路50输出给设备充电。The primary side feedback (PSR) controlled charger with zero power consumption after charging protection is used for IPHONE mobile phone charging and other battery charging equipment, as shown in Figure 1, themains input line 10 is connected to the primary siderectification filter circuit 20, and the primary siderectification filter circuit 20 is connected to theswitching conversion circuit 40, one of theswitching conversion circuits 40 is connected to the secondary side rectification andfiltering circuit 50, and the other is connected to the primary sidefeedback control circuit 30, and the output of the secondary side rectification andfiltering circuit 50 is used to charge the device.

以下结合图2描述充电器电路。The charger circuit is described below in conjunction with FIG. 2 .

市电输入线路10通过内部的保险丝电阻F1为充电器提供市电电源。输入电压为100-240VAC，频率为50-60Hz。市电输入线路10包括保险丝电阻F1。The commercialpower input line 10 provides the charger with commercial power through an internal fuse resistor F1. The input voltage is 100-240VAC and the frequency is 50-60Hz. Themains input line 10 includes a fuse resistor F1.

一次侧整流滤波电路20将市电输入线路10输入的交流电压转化为平滑的直流电压，为其后级的开关变换电路40提供能量。一次侧整流滤波电路20包括桥堆BD1、电感L1、L2、电容C1、C2、电阻R1。The primary-side rectification andfiltering circuit 20 converts the AC voltage input from themains input line 10 into a smooth DC voltage to provide energy for thesubsequent switching circuit 40 . The primary-side rectifying and filteringcircuit 20 includes a bridge stack BD1, inductors L1, L2, capacitors C1, C2, and a resistor R1.

开关变换器电路40接受前级供给的能量。开关变换器电路40包括EE13立式变压器T1、开关管Q1、电阻R5、R4、R11、电容C4、二极管D5。开关管Q1受原边反馈控制电路30中的PSR芯片U1控制，始终工作在一个高速的导通和截止循环状态，开关管Q1导通时变压器T1存储能量，开关管Q1截止时变压器T1释放能量。Theswitching converter circuit 40 receives the energy supplied from the preceding stage. Theswitching converter circuit 40 includes an EE13 vertical transformer T1, a switch tube Q1, resistors R5, R4, R11, a capacitor C4, and a diode D5. The switch tube Q1 is controlled by the PSR chip U1 in the primary sidefeedback control circuit 30, and always works in a high-speed on-off cycle state. When the switch tube Q1 is turned on, the transformer T1 stores energy, and when the switch tube Q1 is turned off, the transformer T1 releases energy. .

二次侧整流滤波电路50的作用是使变压器T1的副边感应到的电压变为充电设备所要的平滑稳定的DC直流电压。二次侧整流滤波电路50包括二极管D7、电容C6、C7、C8，电阻R14、R15、电感L3。The function of the secondary-side rectifying and filteringcircuit 50 is to make the voltage sensed by the secondary side of the transformer T1 become a smooth and stable DC voltage required by the charging device. The secondary side rectification andfiltering circuit 50 includes a diode D7, capacitors C6, C7, C8, resistors R14, R15, and an inductor L3.

原边反馈控制电路30的作用是检测输出充电电压电流的变化，其通过内部的PSR芯片U1控制开关变换器电路40中的开关管Q1的工作频率，始终保持稳定的电压电流输出。变压器T1的反馈绕组(见图2左下角1-2端)连接到开关变换电路40的输入端，PSR芯片U1根据反馈绕组的反馈向开关管Q1输出控制信号。PSR原边反馈控制电路包括变压器T1的反馈绕组、二极管D6、PSR芯片U1、电阻R6～R10、R16、电容C5、C9。The function of the primary sidefeedback control circuit 30 is to detect the change of the output charging voltage and current, and it controls the operating frequency of the switching tube Q1 in theswitching converter circuit 40 through the internal PSR chip U1 to maintain a stable voltage and current output. The feedback winding of the transformer T1 (see terminal 1-2 in the lower left corner of FIG. 2 ) is connected to the input terminal of theswitching conversion circuit 40 , and the PSR chip U1 outputs a control signal to the switching tube Q1 according to the feedback of the feedback winding. The PSR primary side feedback control circuit includes the feedback winding of the transformer T1, the diode D6, the PSR chip U1, the resistors R6-R10, R16, and the capacitors C5 and C9.

Claims (3)

Translated fromChinese

1.简易型充电器电路，其特征是，包括从输入到输出依次连接的市电输入线路、一次侧整流滤波电路、开关变换电路和二次侧输出整流滤波电路，开关变换电路包括开关管Q1和变压器T1的原边和副边，开关管Q1输出到变压器T1的原边，充电器电路还包括原边反馈控制电路，原边反馈控制电路包括变压器T1的反馈绕组和PSR芯片U1，反馈绕组连接到开关变换电路的输入端，PSR芯片U1根据反馈绕组的反馈向开关管Q1输出控制信号。1. The simple charger circuit is characterized in that it includes a mains input line connected sequentially from input to output, a primary side rectification filter circuit, a switch conversion circuit and a secondary side output rectification filter circuit, and the switch conversion circuit includes a switch tube Q1 and the primary side and secondary side of the transformer T1, the switch tube Q1 outputs to the primary side of the transformer T1, the charger circuit also includes the primary side feedback control circuit, the primary side feedback control circuit includes the feedback winding of the transformer T1 and the PSR chip U1, the feedback winding Connected to the input terminal of the switching conversion circuit, the PSR chip U1 outputs a control signal to the switching tube Q1 according to the feedback of the feedback winding.2.根据权利要求1所述的简易型充电器电路，其特征是，变压器T1是EE13立式变压器。2. The simple charger circuit according to claim 1, wherein the transformer T1 is an EE13 vertical transformer.3.根据权利要求1所述的简易型充电器电路，其特征是，市电输入线路包括保险丝电阻F1。3. The simple charger circuit according to claim 1, wherein the mains input line includes a fuse resistor F1.

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