Composition of laptop power adapter
2022-12-08 Views：28
There are many types of power adapters, so we do not understand very comprehensively. How to go about understanding the composition of the notebook power adapter, now let BON technical staff to provide you with professional answers to the main components of the notebook power adapter.
1. Varistor, its function is when the external voltage is too high, varistor resistance quickly become very small, and varistor series fuse is blown, so as to protect other circuits from being burned.
2. Fuse, specification 2.5A/250V, when the current in the circuit is too large, the fuse will be blown to protect other components.
3. Inductor coil (also known as choke), the main function is to reduce electromagnetic interference.
4. Rectifier bridge, specifications for D3SB, the role of 220V AC into DC.
5. Filter capacitor, specifications for 180uF/400V, the role is to filter out the AC ripple in DC, so that the circuit works more reliable.
6. Op-amp 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 adapter, the set temperature threshold is slightly different), the protection circuit will cut off the adapter's voltage output, thus protecting the adapter from damage.
8. High-power switching tube, is one of the core components of the switching power supply, switching power supply can be "an on and off" to work, the switching tube is essential.
9. Switching transformer, one of the core components of the switching power supply.
10. Secondary rectifier, the function is to change the low-voltage AC power into low-voltage DC power. In the IBM power adapter, rectifier tube is often a parallel work of two high-power to obtain a larger current output.
11. Secondary filter capacitors, specifications for 820uF/25V, a total of two, to filter out the role of ripple in low-voltage DC power. In addition to the above components, there are adjustable potentiometers and other capacitive components on the board.
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