Hi everybody, I'm new on this forum so i think it's right place to post - can someone help me with schematics on dc amp, i have dc signal, range 0-5V, i need to proportionally strengthen it to the range of 0-200V/5A into resistive load. I found much schematics on the internet, but they are useless for my application without any step-by-step calculations.
If you plot a graph of output voltage and currents, 4 quadrants will cover all possibilities of +/- output voltage and +/- output current.
A "simple" eg bench psu may only cover simple resistive loads. An amplifier driving a reactive (C and or L) load may need to SINK current when the output is positive.
you need also to consider dynamic effects: Step change in load, what happens? Accuracy? Rated for DC long term or just quick test pulses?
Please describe in detail all the conditions required! Then we can help!
EDIT: I read for studying power transistors! DC does not apply here as DUTs will vaporise at 1KW. Power devices are normally tested using short (300uS) pulses with a 1% duty cyle. so your problem is one of pulse speed and accuracy, not grunt watts.
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What is DUT ? Yes, 1KW is a pretty much, i thought heatsinks and coupled transistors with isolation between signal and power paths will help. but i can't figure it out then, how i can translate DC linear signal into 0-200V of pulse signal, is it some kind of switching power supply ? And does it need some controller do drive ? I looked to the existing IC' chips, and those what i find across the internet was not for high-voltage applications.
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