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There are many kinds of power adapter, so we don't understand it very comprehensively. How to understand the composition of the notebook power adapter, the following benefits come, small make-up for your professional answer notebook power adapter main composition.
1. The function of varistor is that when the external voltage is too high, the resistance value of varistor will quickly become very small, and the fuse in series with the varistor will be blown, so as to protect other circuits from being burnt out.
2. Fuse, specification is 2.5a/250v. When the current in the circuit is too large, the fuse will fuse to protect other components.
3. The main function of inductance coil (also known as choke coil) is to reduce electromagnetic interference.
4. Rectifier bridge, specification d3sb, is used to convert 220 V AC into DC.
5. Filter capacitor with the specification of 180uf / 400V, which is used to filter out the AC ripple in DC power and make the circuit work more reliable.
6. Operational amplifier IC (integrated circuit), an important part of protection circuit and voltage regulation.
7. 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 different temperature thresholds), the protection circuit will cut off the voltage output of the adapter, so as to protect the adapter from damage.
8. High power switch tube is one of the core components in the Switching Power Supply. The switching Power Supply can work "one on one off", and the switch tube is indispensable.
9. Switching transformer, one of the core components in switching power supply.
10, secondary rectifier tube, the function is to change low-voltage alternating current into low-voltage direct current. In IBM's power adapter, the rectifier tube is usually operated by two high-power parallel to obtain larger current output.
11. Secondary filter capacitor, 820uf / 25V, with two in total, which can filter out the ripple in low voltage DC. In addition to the above components, there are adjustable potentiometers and other resistance and capacitance elements on the circuit board.
Best regards,
Shirley Liang
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