Safe And Reliable Laptop Power Adapter

What is the construction of the laptop power adapter?

 

The laptop power adapter, which is also known as the laptop charger. Inside is a high-quality switching power supply, its working principle is the same as the switching power supply in color TV and other home appliances, its role is to provide stable low-voltage DC power for laptop computers, so what is its internal construction?

 

1, varistor, its function is when the external voltage is too high, the resistance value of the varistor quickly becomes smaller, and the fuse in series with the varistor melts, thus protecting other circuits from burning damage.

 

2、Fuse, specification 2.5A / 250V, when the current in the circuit is too large, the fuse will blow to protect other components.

 

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

 

4, rectifier bridge, specification D3SB, function is to 220V AC to DC.

 

5, filter capacitor 180uF / 400V, its function is to filter the DC current in the AC ripple, so that the circuit works more reliably.

 

6, operational amplifier IC (integrated circuit), protection circuit, an important part of voltage regulation.

 

7、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 output of the adapter, thus protecting the adapter from damage.

 

8, high-power switch is one of the core components of the switching power supply. Switching power supply can be "on and off" work, switching power supply plays an important role. 

 

9, switching transformer, one of the core components of the switching power supply.

 

10, secondary rectifier, its function is to convert low-voltage alternating current into low-voltage direct current. In IBM's power adapters, the rectifier is usually operated by two high-power parallel connections for greater current output.

 

11, secondary filter capacitors, specifications 820uF / 25V, a total of two, play a role in filtering out low-voltage DC ripple. In addition to the above components, there are adjustable potentiometers and other resistor-capacitor components on the circuit board.

 

These are important components within the notebook power adapter, do not look at the power adapter appearance of the black is very inconspicuous, the internal components are indispensable.

Eahunt's power adapters have been upgraded to level 6 energy efficiency and can be widely used in all kinds of electronic products. In addition, these products have been in line with the United States, the European Union and other countries, the company did UL, CE and other certifications, the majority of consumers can rest assured that customers can buy play their own role can not be ignored, and continue to develop high-quality, high energy-efficiency products to cope with the market's increasingly demanding energy-efficiency requirements.