car (boat) audio amp...

[arcom]

Hi folks!

I'm building an audio amp for my boat using the TDA1514A ICs (designed for supply voltages from 10-30V). Now, the problem is that on low voltage (12-14V) it gives low power (logically, eh ).
I know that there is a way to raise the voltage with large capacitors, but I was hoping that you can suggest a better circuit for that. Any suggestions are more than welcome.

Thanks in advance.

 

[Chippie]

You can achieve this by using an SG3524 pwm ic, switching a mosfet( suitably rated) and a 50microhenry/5A choke, configured as a boost regulator Suitably rectify the resultant boosted ac voltage.....12-14v in will yield around the level required......

 

[arcom]

Thanks for your reply Chippie, but the problem is that I can't buy that IC in my town. Any replacements? Something from the LM series?

 

[erastos]

what power are you using?

Are you using the boats battery or a seperate battery? I'd like to see the schematic for the design you used.

Thanks

 

[arcom]

I'm using the boat's battery and the amp is nothing special. Built using TDA1552Q (2 x 22W). I've made two of these for four speakers.

I'm also thinking of building another amp for a subwoofer

If you want, I can send you the datasheet.