Phantom power from battery

[nikifena]

lm3578 step up

Hi guys
I like to make 3 channel mixer with battery. I think to do this with 2x9V batteries. All is Ok, but I like to make phantom power from these 2 batteries.
I found step up/down inverters (MC34063 and LM1578A) but I'm not sure that this inverters can make 48V from 18VDC

Any ideas how can I make 48V from 2x9V batteries ?
Thanks

 

[bimbla]

48v step-up for phantom power

Use LM3525/3825 PWM IC and a step-up transformer to achieve your target. Switching freq should be around 100K. So Xer size will also be small.
As for the power switches, use TIP142/147 depending on your logic.

There was an article in Elektor on this app.

I hope that this helps.


bimbla.

Edited:

Kindly read LM3525 as SG3525
and
LM3825 as UC3825

Pardon me for the error.

Thanks and regards,

bimbla.

 

[IanP]

create 48v phantom from battery

There are several ways of generating 48V from 9 or 18V. Very simple one would be voltage multiplier (X3, X4 ..) but if you need more current the LM3578 with or without external transistor can do the job.
(voltage booster: **broken link removed** )