thank you
so should i use the schematic in the datasheet?
i was experimenting with tda7264, but the volume was low... was it because of low 12v power source?
http://www.datasheetcatalog.org/datasheet/SGSThomsonMicroelectronics/mXytyq.pdf
The world is your oyster. There are all sorts of amplifier chips intended for use in car audio. For example, the TDA7377 gives 2x20W or 4x6W into 4 ohm.
A clear winner on power would be the TDA1562, giving a whopping 70W. You didn't say how big your battery was. Battery life will ultimately determine what to use.
For maximum battery life, you should look at a Class D amp. There are some threads on portable boomboxes using this technology, such as this one:
http://www.diyaudio.com/forums/class-d/104402-boominator-another-stab-ultimate-party-machine.html
A clear winner on power would be the TDA1562, giving a whopping 70W. You didn't say how big your battery was. Battery life will ultimately determine what to use.
For maximum battery life, you should look at a Class D amp. There are some threads on portable boomboxes using this technology, such as this one:
http://www.diyaudio.com/forums/class-d/104402-boominator-another-stab-ultimate-party-machine.html
i think ill roll with tda8560, but i want to be sure about some things
first of all... would i need some sort of preamp, before running the signal through the chip
second of all... should i use the circuit in the datasheet?
and last... i just want to make sure that it would run just fne on 12 volts, couse the datasheet says 14.4 volts, but i guess its because thats how much car can give out with the generator running, and it runs just fine on 12 volts as well (it would be kind of stupid if speaker volume went down, when the car isnt running)
first of all... would i need some sort of preamp, before running the signal through the chip
second of all... should i use the circuit in the datasheet?
and last... i just want to make sure that it would run just fne on 12 volts, couse the datasheet says 14.4 volts, but i guess its because thats how much car can give out with the generator running, and it runs just fine on 12 volts as well (it would be kind of stupid if speaker volume went down, when the car isnt running)
I would go for the TDA1557. I have designed a pcb for it and my first prototype had loud clicks on the speakers when switching it on so I added a power on delay part to the circuit to pin 11 to allow the amp to settle before the amp powered the speakers. I also designed the pcb with an opamp buffer as a preamp so no need for a separate preamp. It's a great sounding amp.
Mac
http://www.diyaudio.com/forums/vendors-bazaar/215967-diy-loudspeaker-construction.html
http://novelbooks.weebly.com/index.html
Mac
http://www.diyaudio.com/forums/vendors-bazaar/215967-diy-loudspeaker-construction.html
http://novelbooks.weebly.com/index.html
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well actually one of the reasons why i am going with the 8560 is because local dealer doesnt have 1557, but thanks for the advice anyways...
i am still hoping for the 3 answers
Kitax, I added a buffer to my TDA1557Q amp, actually I designed 3 boards around this chip (straight fwd amp, a sub-woofer amp and a surround sound amp), so as not to interfere with the output opamp of my cd/dvd player. The opamp also takes care of signal conditioning for the sub-woofer or the center and rear channels of the surround sound amp (TDA1558Q).
Mac
Mac
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well actually one of the reasons why i am going with the 8560 is because local dealer doesnt have 1557, but thanks for the advice anyways...
i am still hoping for the 3 answers
In answer to your questions: if you need to change the bass or treble then you would need a preamp otherwise a simple buffer will do. The circuit in the data sheet is fine but you need to add the delay circuit to prevent clicks when switching on and it runs fine on 12v. The 8560 is essentially a higher power version of the 1557Q, might even be an upgraded version of the old TDA1562. The thing though is what is your power source because the higher power chips will drain your battery quicker? If you want I can post my schematic of my amp just need to tidy it up.
Mac
well you can get away with a passive network for bass and treble.
allso, Balerit, 8560 is not an upgraded 1562. it is a 1557 upgrade, able to drive 2 ohms in bridge.
class B BTL chip.
Kitax,
HeadWize - Project: Designing A Pocket Equalizer For Headphone Listening (A HeadWize Design Series Paper)
this will do as a pre-amp.
allso, Balerit, 8560 is not an upgraded 1562. it is a 1557 upgrade, able to drive 2 ohms in bridge.
class B BTL chip.
Kitax,
HeadWize - Project: Designing A Pocket Equalizer For Headphone Listening (A HeadWize Design Series Paper)
this will do as a pre-amp.
Well that's why I designed my amp with an input buffer, you can increase the gain if need be. If you have to add a preamp then use a TDA 7630 or TDA1524 and build a dedicated preamp. I use the TDA 7630 in my Camm EquiTone preamp and it is the best preamp that I have heard. I am currently building a new preamp to test the TDA1524 chip.
Arty I stand corrected on the 8560, the 1562 is an class H amplifier.
DIY Preamplifier - The Book Worm
Mac
Kitax, depending on the speaker You wish to drive, the decreased volume at -probably the mid- freqvencys will not mather at all.
even if so, most likely any decent opamp set with some gain will elliminate this problem.
Say TL082 is absolutely fine for this task.
It can be added later, and it can be run from 12V single rail.
But i would absolute like to ask what speakers are You going to drive with it?
i have a tda1557q amp driving 3 way 8 ohm speakers with a 7" bass unit and i don't even need quarter of its power. Allso i have a passive network to for BSC and bass "boost".
even if so, most likely any decent opamp set with some gain will elliminate this problem.
Say TL082 is absolutely fine for this task.
It can be added later, and it can be run from 12V single rail.
But i would absolute like to ask what speakers are You going to drive with it?
i have a tda1557q amp driving 3 way 8 ohm speakers with a 7" bass unit and i don't even need quarter of its power. Allso i have a passive network to for BSC and bass "boost".
well i actually already made a amp with tda8560, and it sounds grate with 260W 4ohm speakers. unfortunatly a friend of mine burned the chip , by accidentaly sodering wrong wires togather (i asked him to change a rezistor) ... i have plans to change the chip on monday, after he gives it back to me.
... i have plans to change the chip on monday, after he gives it back to me.- Status
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