Boost converter

[JungleVip]

I am studying the circuit board with a TDA2050 chip and the operating voltage is 40v. Would a variable boost converter be a sensible way of achieving this from a 12v car battery?

[R.G.]

Yes, but expect problems with switching noise and grounding. Done properly, it will work fine.

[teemuk]

Indeed. ...And that's how many car amps power themselves. Otherwise it would be pretty much impossible to achieve modest output power to a 4 - 8 ohm loads using only a 12VDC supply.

[JungleVip]

I am looking into getting this Step Up booster Think this would do the trick? Perhaps it could be screened somehow? The capacitor looks pretty big