ShenZhen Yinghuiyuan Electronics Co.,Ltd
Although the size of the Power Adapter is not big, but it is small, complete, internal zero devices or a lot of, today YHY to introduce the internal components of the power adapter and its function.
1: varistor, its function is that when the external voltage is too high, the varistor resistance value quickly becomes very small, and the fuse in series with the varistor is blown, so as to protect other circuits from being burned out.
2: Fuse, specification is 2.5A/250V, when the current in the circuit is too large, the fuse will be blown to protect other components.
3: inductance coil (also known as choke coil), the main function is to reduce electromagnetic interference.
4: Rectifier bridge, specification is D3SB, function is to change 220V AC into DC.
5: Filter capacitor, 180uF/400V, function is to filter out AC ripple in DC, make the circuit work more reliable.
6: Operation amplifier IC(integrated circuit), an important part of the protection circuit, voltage regulation.
7: Temperature probe, 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, the set temperature threshold is slightly different), the protection circuit will cut off the voltage output of the adapter, so as to protect the adapter from damage.
8: High-power switching tube, is one of the core components of switching power supply, switching power supply can "open and close" to work, the switching tube is indispensable.
9: switching transformer, one of the core components of switching power supply.
10: secondary rectifier tube, function is to change low voltage alternating current into low voltage direct current. In IBM's power adapter, the rectifier tube is often operated in parallel by two large power units to obtain a large current output.
11: secondary filter capacitor, specification is 820uF/25V, there are two, filter ripple in low voltage DC. In addition to the above components, the circuit board also has adjustable potentiometer and other resistance and tolerance components.
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Privacy statement: Your privacy is very important to Us. Our company promises not to disclose your personal information to any external company with out your explicit permission.