source:power adapter Popular:adapter release time:2021-04-09 17:50:59 Article author:sznbone
We know that the general switching power adapter is composed of these modules: rectification part + filtering + PWM control + transformation + rectification + sampling + filtering. Then there are various large and small components inside. How much do you know about the internal structure of the power adapter? Today, the power adapter manufacturer will share some knowledge in this area with you.
Next, let’s take a look at what's inside the power adapter.
1. Switching transformer, one of the core components in switching power supply.
2. The temperature probe is used to detect the internal temperature of the power adapter. When the temperature is higher than a certain set value (different brands of power adapters have slightly different temperature thresholds), the protection circuit will cut off the voltage of the adapter Output, thereby protecting the adapter from damage.
3, the fuse, the specification is 2.5A/250V, when the current in the circuit is too large, the fuse will blow to protect other components.bag in box custom
4. The rectifier bridge, the specification is D3SB, is used to convert 220V alternating current into direct current.
5. Operational amplifier IC (integrated circuit), an important part of protection circuit and voltage regulation.
6. Inductance coil (also known as choke coil), the main function is to reduce electromagnetic interference.
7. The filter capacitor is used to filter out the AC ripple in the DC power and make the circuit work more reliable.
8. The high-power switching tube is one of the core components in the switching power supply. The switching power supply can work "one on and one off", and the switching tube is indispensable.
9. Varistor, its function is that when the external voltage is too high, the resistance of the varistor will quickly become very small, and the fuse in series with the varistor will be blown, thereby protecting other circuits from being burned out.
10. The secondary rectifier tube, whose function is to convert low-voltage alternating current into low-voltage direct current. In IBM's power adapter, the rectifier tube is often operated in parallel by two high powers to obtain a larger current output.
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