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Dual voltage supply from battery??

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hameeds01

hameeds01

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Dual voltage supply ??

how to get dual voltages (12v, 0v, -12v) from a single 12V battery ??
 

Re: Dual voltage supply ??

Hi,

It depends on how much current you need. For relatively low currents (< 100mA), a charge pump is a simple way to invert a voltage.

Regards,
Chris
 

Re: Dual voltage supply ??

Preferred option is to employ an off-the-shelf dc/dc converter, something similar to the NMA1212 and there are several parts available, depending on the power/current you need to draw from +/-12V supply ..
Another option is to generate only -12V using, for example 555-based dc/dc circuit, another option is a charge-pump etc. etc. ..
All depends on the current and quality of +/- 12V voltage ..

Rgds,
IanP
 

Dual voltage supply ??

Hi,
For 80mA is a charge pump on the limite, but it eixsts i.e small switchers, called voltage invers converter too...
K.
 

Re: Dual voltage supply ??

karesz said:
Hi,
For 80mA is a charge pump on the limite, but it eixsts i.e small switchers, called voltage invers converter too...
K.
Click to expand...

Yes, look at Maxim - they do some capacitor pumps that will do 100mA.

Keith
 

Here is a simple way of generating +/- supply with a catalog coupled inductor.

**broken link removed**
 

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