I've had several occasions where this piece of test equipment would come in handy. I was think of using this schematic, but it has several issues that I can see.
One of them is a prepackaged Darlington has an unwanted resistor B-E. So I've come up with another idea.
It isn't pretty, but I think it will do the job. I used a Sziklai Pair to reduce the BE voltage drop, and the total transistor will have really high gain (somewhere in the neighborhood of 1e6). The total transistor will probably drop around 1.2V C-E, but I think I can live with that.
It should vary between 0-10A, and the modulation input will let me input a square wave to make the current switch between two values, which will let me see how fast the regulator under test can correct.
I'm interested in feedback on this concept, though I really don't want to scrap the whole idea and design to someone elses vision on how it should be done.
One of them is a prepackaged Darlington has an unwanted resistor B-E. So I've come up with another idea.
It isn't pretty, but I think it will do the job. I used a Sziklai Pair to reduce the BE voltage drop, and the total transistor will have really high gain (somewhere in the neighborhood of 1e6). The total transistor will probably drop around 1.2V C-E, but I think I can live with that.
It should vary between 0-10A, and the modulation input will let me input a square wave to make the current switch between two values, which will let me see how fast the regulator under test can correct.
I'm interested in feedback on this concept, though I really don't want to scrap the whole idea and design to someone elses vision on how it should be done.
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