TL594: About the Switching Characteristics for rise/fall time..

Kengo.Y

Part Number: TL594

Hi team,

I'd like to know about the Switching Characteristics for rise/fall time..
My customer uses Common-emitter configuration.
If the power supply voltage and load resistance are different from the datasheet, how will the rise and fall time change?

Sincerely.
Kengo.

over 4 years ago

0 Hong Huang over 4 years ago

TI__Guru 73155 points

Hi,

You need to make estimate based on the datasheet and the parameters in your design. Basically, from the datasheet, you can estimate the collect current from tr and tf along with the Figure 5 and 6. Then use the estimated current to your design and estimate tr and tf of your design.

Figure 5 and Figure 6 provide the circuit diagram how tr and tf are tested. You can use the same test circuit to test with your intended numbers.

0 Kengo.Y over 4 years ago in reply to Hong Huang

Guru 11165 points

How about the calculation result when the power supply is 12V and 50Ω?

Sincerely.
Kengo.

0 Hong Huang over 4 years ago in reply to Kengo.Y

TI__Guru 73155 points

On Figure 5, tr looks the same, if using 100ns on the datasheet, then plug your number into the same equivalent circuit, it looks still about 100ns.

I will see what tf is like.

0 Hong Huang over 4 years ago in reply to Hong Huang

TI__Guru 73155 points

It looks also similar after change to your number, based on tf = 30ns from the datasheet.

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TL594: About the Switching Characteristics for rise/fall time..