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手机充电器的工作原理是什么?

日期:2017-02-21 15:13:17 来源:奔驰宝马电玩城下载

  手机充电器从字面上理解,即是给手机充电的产品,但手机充电器不仅仅只是给手机充电,还能为iPad、相机、mp3等进行充电,因此来说手机充电器的作用还是很大的。但是很多人并不清楚手机充电器的工作原理是怎样的,下面就由充电器厂家为大家详细讲解一下吧!

  Phone charger literally, is used to recharge the phone products, not only charge their phone, mobile phone chargers but also for the device, camera, mp3, etc, therefore, the role of the mobile charger is very big still.But many people do not know what is the working principle of mobile phone chargers, below is the charger manufacturers detailed explain for everybody!

  手机充电器的工作原理:

  The working principle of mobile phone charger:

  所有手机充电器其实都是由一个稳定电源(主要是稳压电源、提供稳定工作电压和足够的电流)加上必要的恒流、限压、限时等控制电路构成。下面我们来看一下手机充电器的工作原理图:

  All mobile phone chargers are controlled by a stable power supply (mainly regulated power supply, to provide a stable working voltage and current) combined with necessary constant current and pressure limiting, such as time limit control circuit.Let's look at some of the mobile charger working principle diagram:

  220V交流输入,一端经过一个半波整流,另一端串一电阻后经电容滤波。这个10欧的电阻用来做保护的,如果后面出现故障等导致过流,那么这个电阻将被烧断,从而避免引起更大的故障。右边的4007、4700pF电容、82KΩ电阻,构成一个高压吸收电路,当开关管13003关断时,负责吸收线圈上的感应电压,从而防止高压加到开关管13003上而导致击穿。

  220 v ac input, end after one and a half wave rectification, the other end of the string after a resistor capacitor filter.The 10 resistance for protection, if the malfunction cause such as over-current, the resistance will be burn out, then, to avoid causing greater failure.The right of the 4007, 4700, 82 k Ω pf capacitor, resistor, constitute a high pressure absorbing circuit, when 13003 shut off switch tube, responsible for the absorption of the induction voltage on the coil, thus preventing high pressure to the switch tube in 13003 and the breakdown.

  13003为开关管用来控制原边绕组与电源之间的通、断。当原边绕组不停的通断时,就会在开关变压器中形成变化的磁场,从而在次级绕组中产生感应电压。左端的510KΩ为启动电阻,给开关管提供启动用的基极电流。13003下方的10Ω电阻为电流取样电阻,电流经取样后变成电压(其值为10*I),这电压经二极管4148后,加至三极管C945的基极上。

  13003 to switch work to control the boundary between the winding and the power supply, broken.When the original winding kept on and off, will form a changing magnetic field in the switch of the transformer, thus the output voltage is induced in the secondary winding.510 k Ω at left to start the resistance, to start with the base current switch tube.13003 below 10 Ω resistance for a current sampling resistor, electricity flows through after sampling (with a value of 10 * I) into voltage, the voltage diode after 4148, add to the transistor C945's base.

  当取样电压大约大于1.4V,即开关管电流大于0.14A时,三极管C945导通,从而将开关管13003的基极电压拉低,从而集电极电流减小,这样就限制了开关的电流,防止电流过大而烧毁。变压器左下方的绕组(取样绕组)的感应电压经整流二极管4148整流,22uF电容滤波后形成取样电压。取样电压经过6.2V稳压二极管后,加至开关管13003的基极,实现了稳压输出的功能。

  When sampling the voltage is greater than about 1.4 V, that is, when the switch tube current is greater than 0.14 A, triode C945 conduction, thus will switch tube voltage lower base of 13003, thus collector current decreases, and thus limit the current switch, prevent excessive current and burned.Winding transformer windings of the lower left (sampling) induced voltage of the rectifier diode rectifier, 4148 22 uf capacitor filter after sampling the voltage.After 6.2 V zener diode voltage sampling, and the switch tube 13003 base, realized the function of the voltage output.