when i short circuit the C the music comeout. Does the ic broken? - diyAudio
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Old 13th May 2005, 05:21 PM   #1
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Default when i short circuit the C the music comeout. Does the ic broken?

I make amp 40w tda1560q.
It use external 2 capacitors 2200uF to help make high voltage.
I use circuit in its datasheet.
Its has sound of distortion all the time, no music out.
When i short circuit the C 2200uF on the left, the music comeout.

I think one of the circuit in the ic that make voltage is broken.
I never make a risk that ic can broken.

Does the ic broken?
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Old 13th May 2005, 08:36 PM   #2
Nuuk is offline Nuuk  United Kingdom
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Can you show us a circuit of exactly what you have built.

It sounds like you have the cap in series with the rail which would be wrong!
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Old 14th May 2005, 02:05 AM   #3
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Quote:
Originally posted by Nuuk
Can you show us a circuit of exactly what you have built.
It sounds like you have the cap in series with the rail which would be wrong!
No, Nuuk, it's ok.
These are car-audio BTL "class-H" chips, they have a pair of caps between two pins each for lifting the voltage after a certain power output, when the class-H circuit kicks in.
Otherwise it would not be possible to have such a power with only a single 12v battery.
This chip is similar to the TDA1562, but with less power.

I don't know what the problem can be, though...
Maby a faulty chip, but they are not cheap... the TDA1562 costs ~15 around here.
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Old 14th May 2005, 09:21 AM   #4
Nuuk is offline Nuuk  United Kingdom
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Quote:
These are car-audio BTL "class-H" chips,
I see Carlos. I only have a bicycle so don't have such problems!
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Old 14th May 2005, 02:31 PM   #5
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Quote:
Originally posted by Nuuk
I see Carlos. I only have a bicycle so don't have such problems!

Hey, I bet you don't have a system on your bike...
Yet.
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Old 14th May 2005, 03:10 PM   #6
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I have no money to buy new ic yet. must wait to next month.

the 1562q is 50% more expensive than 1560q here.
so I buy 1560 to try.
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Old 14th May 2005, 03:42 PM   #7
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Default Re: when i short circuit the C the music comeout. Does the ic broken?

Quote:
Originally posted by jinkuchi
I make amp 40w tda1560q.
It use external 2 capacitors 2200uF to help make high voltage.
I use circuit in its datasheet.
Its has sound of distortion all the time, no music out.
When i short circuit the C 2200uF on the left, the music comeout.
Hi jinkuchi

Is the pin 17 of the IC connected to ground?

If not , connect it to ground...

Regards

Jorge
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Old 15th May 2005, 03:37 PM   #8
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I connect pin 17 to ground, nothing happen. it's same. but i feel the ic is hoter.

now it's have many of pop sound. when no signal it's quiet.
but when i turn volume higher it has many of pop sound.
when turn volume down it quiet.
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