How to select appropriate MOS switch parameters through Vds and Id curves?

Knight97538

How to select appropriate MOS switch parameters through Vds and Id curves? [Copy link]

The Vds and Id curves of the MOS tube below. How to read this curve

The waveforms of Vgs are 2.5V, 3.0V and 4.5V respectively. If Vds=0.5V, 2V and 3.5V, will the Id be very different?

How to choose the appropriate Vgs of MOS to turn on and off the MOS tube through this diagram? What parameters should be considered?

maychang

[Waveforms with Vgs of 2.5V, 3.0V and 4.5V respectively]

That is not a "waveform". A "waveform" refers to a curve showing the change of a physical quantity (voltage, current, temperature, displacement, etc.) over time, and its horizontal axis must be time. However, this graph does not include the time factor at all.

maychang

[If Vds=0.5V, 2V and 3.5V, is there a big difference in Id? ]

Of course.

maychang

[How to choose the appropriate Vgs of MOS through this diagram to realize the turn-on and turn-off of MOS tube? ]

To "select" the right MOS, you must choose from different types of MOS tubes. Then you should compare the parameters and curves of different models, and then choose from them. Now you only have one type of curve (this curve is called the output characteristic curve of the MOS tube). Without comparison, how can you choose?