when i short circuit the C the music comeout. Does the ic broken?

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jinkuchi

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Joined 2004
#1
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?
 
#3
Nuuk said:
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!
Click to expand...

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...:xeye:
Maby a faulty chip, but they are not cheap... the TDA1562 costs ~15€ around here.
 
#7
jinkuchi said:
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.
Click to expand...

Hi jinkuchi

Is the pin 17 of the IC connected to ground?

If not , connect it to ground...

Regards

Jorge
 
#8
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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