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<p>Composition of notebook <a href="https://www.fuyuanpower.com/power-adapter" rel="noopener noreferrer" target="_blank"><strong>power adapter</strong></a></p><p><br></p><p>1: Varistor, its function is that when the external voltage is too high, the resistance of the varistor quickly becomes very small, and the fuse connected in series with the varistor is blown, thereby protecting other circuits from being burned out. 2: Fuse, the specification is 2.5a/250v. When the current in the circuit is too large, the fuse will blow to protect other components. 3: Inductance coil (also called choke coil), the main function is to reduce electromagnetic interference. 4: Rectifier bridge, the specification is d3sb, the function is to convert 220v AC power into DC power. 5: Filter capacitor, the specification is 180uf/400v, the role is to filter the AC ripple in the DC power, so that the circuit works more reliably. 6: Op amp (integrated circuit), an important part of protection circuit and voltage regulation. 7: Temperature probe, used to detect the internal temperature of the<a href="https://www.fuyuanpower.com/power-adapter" target="_blank"> power adapter</a>. When the temperature is higher than a certain set value (the <a href="https://www.fuyuanpower.com/power-adapter" rel="noopener noreferrer" target="_blank">power adapter</a> of different brands, the set temperature threshold is slightly different), the protection circuit will cut off the voltage of the adapter Output to protect the adapter from damage. 8: 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: Switching transformer, one of the core components in switching power supply. 10: Secondary rectifier, the function is to change low-voltage alternating current into low-voltage direct current. In the <a href="https://www.fuyuanpower.com/power-adapter" rel="noopener noreferrer" target="_blank">power adapter</a> of IBM, the rectifier tube is often operated in parallel by two high powers to obtain a larger current output. 11: Secondary filter capacitor, the specification is 820uf/25v, there are two in total, which plays the role of filtering ripple in low-voltage direct current. In addition to the above components, there are adjustable potentiometers and other resistance-capacitance components on the circuit board.</p>
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