5Vdc to 22Vdc: how?

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2 total messages Started by M. Sun, 20 May 2007 07:59

#243

Author: M.
Date: Sun, 20 May 2007 07:59

8 lines
1066 bytes

Hi,
for a small elektronic projekt I need to convert 5Vdc to 22-24Vdc at 100mA
max.
It has to be done on PCB and the area needs to be as small as possible.
Are there any special IC's available for this?

Thanks,
Marc

Re: 5Vdc to 22Vdc: how?

#244

Author: Ramke
Date: Mon, 21 May 2007 06:28

18 lines
1895 bytes

On 20 mei, 09:59, "M." <m.horem...@skynet.be> wrote:
> Hi,
> for a small elektronic projekt I need to convert 5Vdc to 22-24Vdc at 100mA
> max.
> It has to be done on PCB and the area needs to be as small as possible.
> Are there any special IC's available for this?

Yes, they are called step-up voltage converters.  Maxim and National
has them.
Maybe the http://cache.national.com/ds/LM/LM3477.pdf can do.

Watch out for the FB-pin as it is very sensitive for overvoltage,
never connect FB to the output when the converter is running with the
FB disconnected.

>
> Thanks,
> Marc

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