Power Adapters With 100%Aging Test

Power adapter component parts and its function introduction

Although the size of the power adapter is not large, but it is a small sparrow, all the internal components are still a lot of parts, today Eahunt Electronics will give you an introduction to the internal components of the power adapter and its function.

1: varistor, its function is when the external voltage is too high, the varistor resistance value quickly becomes very small, and the series connection with the varistor fuse is blown, so as to protect the other circuits are not burned.

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

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

4: rectifier bridge, specifications for the D3SB, the role of 220V AC into DC.

5: filter capacitor, specification for 180uF/400V, the role is to filter out the DC power in the AC ripple, so that the circuit works more reliably.

6: Operational amplifier 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 set value (different brands of power adapters, 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 "on and off" work, switching tube is indispensable.

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

10: secondary rectifier, the function is to change the low-voltage alternating current into low-voltage direct current. In the IBM power adapter, the rectifier tube is often by two high-power parallel operation, in order to obtain a larger current output.

11: secondary filter capacitors, specifications for the 820uF/25V, a total of two, to filter out the role of low-voltage DC ripple. In addition to the above components, the board also has adjustable potentiometer and other resistive components.

If you want to know more about switching power supply information, you can consult Xiamen Eahunt Electronics.

Whatsapp:+86 13860786068

Email: athene-cai@eahunt.com

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