How much driving time is required for transistors and MOS?

QWE4562009

How much driving time is required for transistors and MOS? [Copy link]

 

How much driving time is required for transistors and MOS?

Is there a time requirement? But it can be driven within 50us, right? Does it need to be hundreds of us to ms level?

For example, transistors SS8050 8550 MMBT5551 5401 etc.

MOS tube AO3400 2300 7002 etc.

vincentc543

MOS跟三級管只有聽過頻率響應,沒聽過甚麼驅動時間阿

vincentc543

如果是反應時間,可能是因為電路板上的其他線路影響到反應時間.

mingplus

As long as the driving current is sufficient, t,on/t,off/r,rise/t,fall are basically in ns.

mingplus

As long as the driving current of MOS tube is sufficient, the t,on/t,off/r,rise/t,fall is basically ns. The t,off time of triode may be us.

QWE4562009

mingplus posted on 2022-6-3 11:51 As long as the driving current of MOS tube is sufficient, the t,on/t,off/r,rise/t,fall time is usually ns. The t,off time of triode tube may be us.

Isn't it a voltage driven type? Does it need current? How much mA does it need to be greater than?

damiaa

They are all in nanosecond level. You can refer to the data of transistors and MOS tubes for details.

QWE4562009

damiaa posted on 2022-6-6 20:46 They are all in nanosecond level. For details, please refer to the data of triode and MOS tube.

No requirements for drive current

damiaa

QWE4562009 posted on 2022-6-7 19:18 Is there any requirement for driving current?

That's for sure

QWE4562009

damiaa posted on 2022-6-7 20:13 That's for sure

How much

damiaa

QWE4562009 posted on 2022-6-10 19:17 How much do you want

Which device to use depends on its data.

QWE4562009

damiaa posted on 2022-6-13 09:44 You should refer to the data of the device you are using.

For example, 8050 or 3400

shuangchafeng

They are all in nanosecond level. You can refer to the data of transistors and MOS tubes for details.

QWE4562009

shuangchafeng posted on 2023-7-31 18:27 They are all in nanosecond level. For details, please refer to the data of triode and MOS tube.

Is it true that the reciprocal of the four times is the frequency?

Ejack1979

The frequency of a transistor is related to many factors, such as the working state, such as Ic. Generally, the frequency characteristic is expressed as the product of gain and bandwidth, which is called the current gain bandwidth product (Current Gain Bandwidth Product), such as Figure 6 of the SS8050 data sheet of ON Semiconductor.

You can find out what device you want to use by looking at the corresponding data page. This thing is not universal, and there will be huge differences when it is made by different manufacturers.

QWE4562009

Ejack1979 Published on 2023-8-2 10:17 The frequency of a transistor is related to many factors, such as the working state, such as Ic. Generally, the product of gain and bandwidth is used to express its frequency characteristics, which is called gain bandwidth...

Well said. Gain bandwidth product means that as the frequency increases, the amplification factor decreases.