81 views Yuda Electronic (HK) Technology Co.,Limited. 2019-05-07
There are many types of power adapters, so everyone is not very comprehensive. How to get to know the composition of the notebook power adapter, the following is the main component of your professional notebook power adapter.
1, varistor, its function is that when the external voltage is too high, the varistor resistance quickly becomes very small, the fuse in series with the varistor is blown, thus 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 melt to protect other components.
3, the inductor coil (also known as choke), the main function is to reduce electromagnetic interference.
4, rectifier bridge, the specification is D3SB, the role is to turn 220V/110V AC into DC.
5, the filter capacitor, the specification is 180uF/400V, the function is to filter the AC ripple in the DC power, making the circuit work more reliable.
6, op amp IC (integrated circuit), protection circuit, an important part of 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 adapter voltage Output 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 “open and close”, the switch tube is indispensable.
9, switching transformer, one of the core components in the switching power supply.
10, the secondary rectifier, the function is to change the low-voltage alternating current into low-voltage direct current. In IBM’s power adapters, the rectifiers are often operated in parallel with two high powers to achieve a large current output.
11, secondary filter capacitor, the specification is 820uF/25V, there are two, which filter the ripple in low-voltage DC. In addition to the above components, there are adjustable potentiometers and other RC components on the board.
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