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Hello everyone, in this lesson we will learn the types of MOS tubes

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The MOS tubes used in the mainboard can be divided into two types according to the structure

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One is called N-channel MOS tube, and the other is called P-channel MOS tube.

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They are used in different applications and have different turn-on conditions

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Most of the MOS tubes used in the circuit are N-channel MOS tubes,

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and P-channel MOS tubes are rarely used

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There is no difference in appearance between these two MOS tubes

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MOS tubes can be divided into three-legged tubes and multi-legged tubes according to the pin position

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Tripod tube can also be called sesame tube or small tube

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It is generally used to transmit signals, and the power is relatively small

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The power of multi-legged tubes is generally relatively large,

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and most of them are used in power supply.

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For example, the eight-legged tube in the upper right picture

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It is a MOS tube used in the power supply circuit

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Although the eight-legged tube has 8 pins, it still only has 3 poles

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There is a dot in the lower left corner, this dot represents the first kick

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The 1-3 pins of the eight-pin tube are S poles, the fourth pin is G pole,

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and the 5-8 pins are D poles

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The lower left picture shows the three poles of the eight-legged tube

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MOS tubes can also be divided into single MOS tubes

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and double MOS tubes according to the number of MOS tubes integrated on a component

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Single MOS tube is very common

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A component is a MOS tube

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For example, these are all single MOS tubes

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And dual MOS tubes, two MOS tubes are integrated on one component

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For example, in the picture on the right, these two are dual MOS tubes

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Two MOS tubes are integrated on one component

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The above is the small tube of the double MOS tube, which is generally used to transmit signals

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The following is the large tube of the double MOS tube, which is generally used for power supply.

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The small tube of the dual MOS tube has 6 pins

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We can cut it obliquely and divide it into two MOS tubes

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Its pinout is shown in the figure