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Author Topic: LAB techniuque to avoid higher current then possible  (Read 215 times)

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Offline john23Topic starter

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LAB techniuque to avoid higher current then possible
« on: September 21, 2024, 01:48:59 pm »
Hello,I have build a circuit which intend to use as a driver for PMA5-83-2W+.
My main concern   is the driver putting more current then the port can handle.
For example in my circuit shown in the attached photo I have TL431 which can output much more then 4mA.
So In the worst scenario my circuit will see 100Ohm instead of 555Ohm and I will get much higher current flowing into the Vg1 port and damaging it.
Is there a way to handle it in the lab?
Thanks.

LTSPICE file are attached.

https://www.minicircuits.com/pdfs/PMA5-83-2W+.pdf
« Last Edit: September 21, 2024, 01:53:18 pm by john23 »
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Offline NiHaoMike

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Re: LAB techniuque to avoid higher current then possible
« Reply #1 on: September 22, 2024, 01:45:07 am »
I'm not understanding the problem, the TL431 cannot supply any current, it can only sink it. The current supply is from the opamp which is limited by the resistor.
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