MAX1044 charge pump question

[El Heisenberg]

I got this project, an amp that uses a tda2003z the whole thing runs off of a 12.6v 1.2A transformer from radioshack. After the bridge rectifer and LM317 voltage regulating i get 11.53 volts for my amp and pre amp.

Can I use the MAX1044 charge pump to get more smooth dc to the amp?? I want more power for more volume and headroom. When i ran it off of 3 decayed 6v lantern batteries it worked great at 16.5 volts.

Lookin at the datasheet it says it has a max operating voltage of 10v. But how much can i add on from it if i just reduce the lm317 circuit to 10v?? Also i run another lm317 circuit at 9v for the GGG digi reverb after the 11.53v fetzers in the preamp and a bulldog can sim for a line out after the preamp. Could i use this to get the extra voltsa and put them towardsthe amp?? 

[head_spaz]

The MAX1044 is only capable of providing 10 milliamps of current. (that's 0.010 amps.)
It's a no-go for your application.

[El Heisenberg]

Wow that was a dumb question i guess.

On the GGG pt-80 delay project, its used to add 3 volts. I guess the amperage is real small.

[PRR]

The power-chip does not need regulated power. The 12VAC makes ~~18V raw DC. Just scrap the regulator.

BUT the chip will run twice as hot.

And the 2003 is aimed at 12V (car) use. IIRC, it is supposed to cut-out at 18V or 20V in self-protection. So it may just shut-up. And worst-case, the self-protection isn't enough and it fries. Since it is a $4 chip, that's not a big boo-hoo; still, you should read the datasheet and consider risk versus results before you do anything as silly as I'm suggesting.

[El Heisenberg]

Thanks! That is something ive been wondering about.


I have two lm317s in there. One for the fetzer valves and the chip amp and one for the reverb and cab sim. One was able to get 18v. So i tried using that one for the amp. It wouldnt work at all. It would sputter. Turn off and on real fast and when i could get it to work it would be noisy and splatty. Hot too even with the two heavy heatsinks i put on it. So i used the regulator that got 11.53v max to power it instead.. Ive run this chip at 16v from 3 lantern batteries. It got WARM but i had a dinky heat sink on it and it was fine. It was a little louder and cleaner.

The reason i used to run it on batteries is cos the first time i built this without the dc regulator i got huge hum. Unacceptable. The only time i got this thing to function was either with batts or the lm317.

Any way i could add just 2 or 3 volts to the amp power supply? Another transformer after the 12v one to bring the ac up? Im happy with the amp, but when i make sometjin i really like i cant stop adding on.