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#1
02-10-2010, 06:18 AM
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50V input, 100V output problem
Hi All. I am trying to design a circuit that has a 50V input and the output is 100V. Can anyone give me an idea on how to make the circuit? I need help on this, I started this morning but until now I cannot think of any circuit that will have a 50V input and the output is 100V.
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#2
02-10-2010, 07:02 AM
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Wrong forum man.
But if the voltages are AC, just use a step up transformer.
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#3
02-10-2010, 08:13 AM
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Is your input AC or DC?
If AC, a transformer is going to be your easiest solution. If DC, you're going to need a DC-DC converter. Whatever your output current requirement is, you will need more than twice that for your input current; as there will be at least some loss during the conversion. Some converter designs can get better than 90% efficiency. So, if you have a 90% efficient converter, for each amp of output that you need at 100v, you will need 50v x 100v/(50V*90%) = 2.222...Amperes input current at 50v.
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#4
02-10-2010, 08:18 AM
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Hello,
I moved the thread here. As count_volta already told you , you posted in the wrong forum. Please take care to choose the right forum. Greetings, Bertus
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#5
02-10-2010, 06:08 PM
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Sorry if it was place in the wrong forum. As I tried to enter this thread to the forum I encountered an Internal Server Error and I wasn't able to check it again if it was place in the correct forum. Anyway, my input is a DC supply. Our current set-up requires only a 25V output, we didn't have a problem with it since our input is 50V. Now, we are required to have a 100V output but the problem is our maximum input is only 50V. In addition to this, our circuit is already placed in a Laid-out board so we are looking for a way in which the revision that we are going to do won't make a big change in our circuit.
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#6
02-10-2010, 06:36 PM
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So, you need 100V out.
AC or DC out? What current do you need for the output at 100v? What is the current input at 50v? How much space do you have left on the board for this?
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#7
02-10-2010, 06:42 PM
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Here is a small-footprint DC-DC converter that will take in 35v to 75v, and output 96v @ 100mA, up to 89% efficient:
http://mouser.com/ProductDetail/Mura...flu9fNEA%3d%3d
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#9
02-10-2010, 10:49 PM
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Let's see - you have 1A input at 50V DC, and you want 100V out at 120A.
Were you planning on including a small nuclear power plant on the board to generate all this extra power required? Because you'll need at least 240A input with a 100% efficient DC-DC converter, and that's just not going to happen. Or were you talking extremely short bursts of 120A, with a long period of recovery in between?
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