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5Vdc to 22Vdc: how?

M

M.

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
 
C

Charlie Siegrist

Circa Sun, 20 May 2007 10:01:20 +0200 recorded as
<[email protected]> looks like "M."
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. Google "dc to dc converter." The requirement for 24V at 100mA might
be difficult to meet in a really small, or "subminiature" package.
 
P

Paul E. Schoen

Charlie Siegrist said:
Circa Sun, 20 May 2007 10:01:20 +0200 recorded as
<[email protected]> looks like "M."


Yes. Google "dc to dc converter." The requirement for 24V at 100mA
might
be difficult to meet in a really small, or "subminiature" package.

I did something like this with a PIC16F684 which drives a MOSFET with 100
kHz PWM in a boost converter using a 10 uH choke. The entire board is 1" x
2", and it converts 12 VDC to a current of up to 750 mA at 22 to 50 VDC. I
simulated it with LTSpice, and posted the ASCII file on S.E.D. You can also
find single chip solutions, and good app notes and switcher tutorials, on
the website www.linear.com. I learned a lot by designing it with a PIC.

Paul
 
B

Bob Eld

M. said:
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

Purchase a ready to go DC to DC converter such as CD Technologies model
NDTD0512C. Check Mouser and Digikey. This part is PC mount, 0.6in wide by
1.27in long. It is 3 Watts, 5 volts in and dual 12 volts out, isolated.
Don't waste your time trying to design and build one. There are all kinds of
these available in various voltages and power level, etc.
 
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