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small voltage converter 5v -> 50v

I need somthing to convert an input voltage of between 3.6 and 7 volts up to 50 volts in 5v steps, and it has to fit in 2x2cm square(or smaller). The project will use a uController so i will have a PWM available. Will boost converters work for this or will i need something else? The amps will be pretty low, not exactly sure yet how many but low enough so it will not hurt you if you get shocked by it. The final output will be a square wave, if that matters.

I am a computer science engineering student working on a senior design project so my EE is a little flaky.

Thanks in advance Justin

Reply to
BigJp
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Just to start - this is a DC to AC converter? or DC to pulsed DC? or DC to DC?

A square wave by definition is 50% duty cycle so it wouldn't be pulse width modulated. The time the waveform is high would equal the time it is low for a "square" wave.

If it is pulse width modulated, pulsed DC output, is the 50 volts out the RMS value?

Or maybe what you meant was the PWM out is just a way for the processor to communicate with the power supply? Amps out? I was taught it takes at least 100 milliamps through a vital organ to kill a person, but they didn't say how they arrived at that figure.

I get the idea that what you meant to say is you want a 5-50 volt DC to DC converter (then the 5 volt steps start to make sense). Is that what you meant to say?

If it is DC to DC a boost converter could be made to do it, but a step up transformer may be the best way.

You don't specify how accurate the output voltage regulation has to be. Is the idea to control the output with the UPC in a closed feedback loop? How fast can the processor supply toggles for the step up transformer or inductor? You have a A/D to monitor voltage? (or some way to fake it)

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Perhaps...

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Reply to
CWatters

to DC converter (then the 5 volt steps start to make sense). Is that what you meant to say?

I am not sure. I will have a 5v regulated input from batteries. The output voltage needs to be able to be set from 5 volts to 50volts in 5 volt increments.ie I need to be able to output any of the following voltages: 5,10,15,20,25,30,35,40,45,50. all in a square wave.

I am not sure on the required accuracy(good question) but i would think it needs to be around .05 volts I am using the A/D on the chip for something else so i would rather not have to use it.

the proc can supply 1ms toggles

The chip posted also looks interesting

Reply to
BigJp

Thats quite accurate. 0.05V at 50V is only 0.1%

Reply to
CWatters

"BigJp" wrote in news: snipped-for-privacy@o13g2000cwo.googlegroups.com:

volts

something

final

design

You can us this small inverter , calculate the output winding for your required voltages , or use regulators (TO92) in step,

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roma

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roma

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