How to generate 10V DC using 5V DC and -5V DC ?

[danda821]

question about dc power

I am wondering if there is a way to generate 10V DC using 5V DC and -5V DC. This is for IC design not pcb. Thanks.

 

[windman]

question about dc power

You can use charge pump circuits to boost from 5v to 10v

 

[danda821]

Re: question about dc power

How. I have not other power sources, just use 5V and -5V. Thanks.

 

[dpsman]

Re: question about dc power

There is an application note from Philips (for NE555) that describes a simple dc-dc converters with it.
"NE555 and NE556 applications" AN170

 

[aryajur]

Re: question about dc power

Why can't you just use -5V as your reference and take +5V as the 10V line then?

 

[power-twq]

Re: question about dc power

I am wondering if there is a way to generate 10V DC using 5V DC and -5V DC. This is for IC design not pcb. Thanks.

you can use a charge pump and a few capacitors to generate 10V DC from +5V.

but current consumptio for +10V may not be too much.

maxim corporation's many RS232 related product use this technology

successfully.

good luck.

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[marshel]

Re: question about dc power

How. I have not other power sources, just use 5V and -5V. Thanks.

charge pump circuit works like this way
fist phase VDC 5V connect to CAP+ and GND connect to CAP+
second phase VDC 5V connect to CAP- and VOUT connect to CAP+
then you get VOUT equals 10V
in fact, due to switch loss,VOUT is lower than 10V.

 

[qutang]

question about dc power

I think charge pump can do this work .but the cap must off chip.