RE : VOLTAGE DOUBLER

T

Tiscali

Guest
I wonder if anyone can help me with a schematic of a Voltage doubler from
12V dc to 24V dc. I have seen one in a Electronic mag a long time ago. It
used 2 transistors which oscillated, and 2 1N4007 and a cap. I only need
100mA at 24V dc at the output. Please if anyone can help, I would greatly
appreciate it, thanks.

Sean
 
Tiscali <seanj@tiscali.co.za> wrote:
I wonder if anyone can help me with a schematic of a Voltage doubler from
12V dc to 24V dc. I have seen one in a Electronic mag a long time ago. It
used 2 transistors which oscillated, and 2 1N4007 and a cap. I only need
100mA at 24V dc at the output. Please if anyone can help, I would greatly
appreciate it, thanks.
Click to expand...
How regulated?
Do you care about efficiency?
 
Because of diode drops you wont get 24V from 12V. You will need 2 stages.
Also 100mA is quite high for a cap doubler. You will need big 1000uF -
2200uF Caps.

You may want to try a flyback circuit. Lots of noise though. I use the
MC34063 for apps like this.

rol

"Tiscali" <seanj@tiscali.co.za> wrote in message
news:c4n5oq$65v$1@ctb-nnrp2.saix.net...
I wonder if anyone can help me with a schematic of a Voltage doubler from
12V dc to 24V dc. I have seen one in a Electronic mag a long time ago. It
used 2 transistors which oscillated, and 2 1N4007 and a cap. I only need
100mA at 24V dc at the output. Please if anyone can help, I would greatly
appreciate it, thanks.

Sean
Click to expand...
 
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