Knowledge popularization post, the master teaches you to understand the functions of graphics card components 2

We can see that there is one MOS tube in the upper bridge and two MOS tubes in the lower bridge. Why is this? In fact, it is very simple. The upper bridge and the lower bridge work asynchronously. When it comes to the lower bridge, the voltage drops and the current increases a lot. The performance required by the MOS tube must be improved a lot, so the lower bridge adopts a design of two MOS tubes. To adjust the voltage, the MOS tube needs to be switched on and off continuously. The heat generated by the MOS tube in this process is very terrible. SO8, commonly known as the octopus, has a relatively low internal resistance, so the heat generation is also correspondingly low. Everyone knows the role of the octopus.

This is the legendary PWM, ON Semiconductor's NCP5395T.

After the voltage is regulated by the MOSFET, it reaches the inductor. We have just said that after the voltage is regulated by the PWM and MOSFET, although the voltage is low, it forms waves of pulse current. At this time, the current is not stable, and it is easy to hang up the core directly. Therefore, it must be processed by the inductor and capacitor. The inductor is like a water tank. After storing the pulse current in the inductor, it is released again. Due to the stabilizing effect of the water tank, the current coming out is relatively stable, rather than the pulse shape when it goes in.

The last process is similar to the first process, and the capacitor is filtered again.

Then it passes through the large passage next to the video memory and is transported to the core without delay.

Of course, we may see that there are no components next to the core. Does it mean that we reach the destination after passing the solid-state capacitor? Obviously not. We can see that there are many small components on the back of the graphics card. In fact, they are also capacitors, but the capacity is relatively small. There will be multiple filtering in the core part. Capacitors of different capacities will filter out clutter of different frequencies to ensure that the voltage input to the core is the most stable.