voltage to current converter in single supply.

H

HIREN DAVE

New Member

• May 7, 2013

• #1

Hi,


I have 1 source that gives me 10V and 2mA. I want 5V and 10mA from this supply.. I have no other source. Is there any technique to increase current by decreasing a voltage????

 

ericgibbs

Well-Known Member

Most Helpful Member

• May 7, 2013

• #2

hi Hiren,

Consider the 'power' of those two V/I's

10 *.002 = 20mWatt

5 * 0.01 = 50mWatt

Cant get more power out than in....

E.

 

H

HIREN DAVE

New Member

• May 7, 2013

• #3

ok. got it...

Now, my another question is I have a point source of 0.75V and 1.3mA. From this source, i want to generate 3.3V and 750mA. Is there any other option to get these much voltage except increasing no. of sources???
1 option is to use around 2461 sources and connect it to series or parallel to generate this much voltage. Any other option???

 

D

Diver300

Well-Known Member

Most Helpful Member

• May 7, 2013

• #4

HIREN DAVE said:

ok. got it...

Now, my another question is I have a point source of 0.75V and 1.3mA. From this source, i want to generate 3.3V and 750mA. Is there any other option to get these much voltage except increasing no. of sources???
1 option is to use around 2461 sources and connect it to series or parallel to generate this much voltage. Any other option???

Click to expand...

Not really. You certainly need around 2500 times the power of the source.

 

H

HIREN DAVE

New Member

• May 7, 2013

• #5

ok. thanks... any other idea or option???

 

alec_t

Well-Known Member

Most Helpful Member

• May 9, 2013

• #6

You would have to use series and/or parallel combinations. There is no other way.

 

H

HIREN DAVE

New Member

• May 9, 2013

• #7

ok...

 

ericgibbs

Well-Known Member

Most Helpful Member

• May 9, 2013

• #8

hi,
You have not said what the voltage sources are.

If the internal resistance of each cell is high, at 750mA load current, the internal resistance of a series chain could be a problem.

 

unclejed613

Well-Known Member

Most Helpful Member

• May 9, 2013

• #9

post #3 sounds like a small solar cell, or an LED.... you would need a lot of those in a 5x577 series-parallel array to get the voltage and current you're looking for.... that's 2885 of them. that's also a lot of soldering. you could probably have a 5x10 array slowly charge a battery, and use the battery to provide the power if the circuit doesn't require being powered on all the time.