Bipolar 12v off 12v DC - Electronic Circuits Projects Diagrams Free

joecool85 · 27th February 2006, 10:52 PM

Would that give me +12 volt and -12 volt?* If not, can you show me how I could get that?

Styx · 27th February 2006, 11:31 PM

Well since you have +/-12V already the rest of the stuff is just decoupling and filtering, why wouldn't it

audioguru · 27th February 2006, 11:50 PM

I suspect that "Negative on 12V" is the negative terminal of his 12V battery. So the source is +12V and 0V.

Since he doesn't say how much or how little current he needs from a -12V circuit, maybe an ICL7660 charge-pump IC will make enough.

joecool85 · 28th February 2006, 12:52 AM

Yeah, you got it, 12volt battery power. I need enough current to drive a couple TDA2030 chips. They produce 14w a piece.

joecool85 · 28th February 2006, 12:53 AM

And I was doing 12volts thinking it would be easier to keep it 12v since I'd be starting with 12v. But if its going to take more, then it'd be good to get +/-15 to 18v or so.

audioguru · 28th February 2006, 01:23 AM

A TDA2030 amp chip produces only 10W into a 4 ohm speaker with a supply of positive and negative 12V. It produces 14W with a positive and negative 14V supply.

Why not use a TDA2005 bridged amp IC that is used for car radios? It produces 14W into a 4 ohm speaker with a 14V single supply.

joecool85 · 28th February 2006, 03:17 AM

Thats a good point. I had TDA2030s on the brain because of my K20X.

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27th February 2006, 10:52 PM	#1
joecool85	Bipolar 12v off 12v DC Would that give me +12 volt and -12 volt?* If not, can you show me how I could get that? __________________ Life is what you make it.

27th February 2006, 11:31 PM	#2
Styx	Well since you have +/-12V already the rest of the stuff is just decoupling and filtering, why wouldn't it __________________ Nothing is impossible. Once a problem is realised, the rest is just details

27th February 2006, 11:50 PM	#3
audioguru	I suspect that "Negative on 12V" is the negative terminal of his 12V battery. So the source is +12V and 0V. Since he doesn't say how much or how little current he needs from a -12V circuit, maybe an ICL7660 charge-pump IC will make enough. __________________ Uncle $crooge

28th February 2006, 12:52 AM	#4
joecool85	Yeah, you got it, 12volt battery power. I need enough current to drive a couple TDA2030 chips. They produce 14w a piece. __________________ Life is what you make it.

28th February 2006, 12:53 AM	#5
joecool85	And I was doing 12volts thinking it would be easier to keep it 12v since I'd be starting with 12v. But if its going to take more, then it'd be good to get +/-15 to 18v or so. __________________ Life is what you make it.

28th February 2006, 01:23 AM	#6
audioguru	A TDA2030 amp chip produces only 10W into a 4 ohm speaker with a supply of positive and negative 12V. It produces 14W with a positive and negative 14V supply. Why not use a TDA2005 bridged amp IC that is used for car radios? It produces 14W into a 4 ohm speaker with a 14V single supply. __________________ Uncle $crooge

28th February 2006, 03:17 AM	#7
joecool85	Thats a good point. I had TDA2030s on the brain because of my K20X. __________________ Life is what you make it.