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What is the structure of the notebook power adapter?LINEAR ADAPTOR

source:power adapter     Popular:adapter     release time:2022-02-15 09:04:18     Article author:sznbone    

  What is the structure of the notebook power adapter?LINEAR ADAPTOR(图1)

  1. 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.

  2, 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.

  3. Inductance coil (also known as choke coil), the main function is to reduce electromagnetic interference.

  4. The rectifier bridge, the specification is D3SB, is used to convert 220V alternating current into direct current.

  5. The filter capacitor, the specification is 180μF/400V, is used to filter out the AC ripple in the 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 slightly different temperature thresholds), the protection circuit will cut off the voltage of the adapter Output, thereby protecting the adapter from damage.

  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. Switching transformer, one of the core components in switching power supply.

  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.

  11, the secondary filter capacitor, the specification is 820μF/ 25V, there are two in total, which can filter out the ripple in the low-voltage direct current.

  In addition to the above components, there are also adjustable potentiometers and other RC components on the power adapter circuit board.


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