Hi everybody.
I built this circuit up from the datasheet. Works great, except that if I use a fresh 9V battery on the loudspeaker connections to check operation, it switches in to protect, but only after 2 seconds. Is this normal? Should I use a higher voltage perhaps to test( don't wanna damage my speakers)
I built this circuit up from the datasheet. Works great, except that if I use a fresh 9V battery on the loudspeaker connections to check operation, it switches in to protect, but only after 2 seconds. Is this normal? Should I use a higher voltage perhaps to test( don't wanna damage my speakers)
The 'error voltage' (in your case 9V) is also of importance.
The error voltage charges the C through the R and the time it takes for the C to charge to the switching threshold depends also on the voltage. There is always a delay to avoid switching on too fast with a bass frequency signal. 0.2 secs for 9V doesn't sound too bad to me.
The other thing is the threshold voltage (point where switching occurs) which also is variable and must be set.
Can you post the circuit diagram of your setup?
jan didden
The error voltage charges the C through the R and the time it takes for the C to charge to the switching threshold depends also on the voltage. There is always a delay to avoid switching on too fast with a bass frequency signal. 0.2 secs for 9V doesn't sound too bad to me.
The other thing is the threshold voltage (point where switching occurs) which also is variable and must be set.
Can you post the circuit diagram of your setup?
jan didden
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Could you remove the 56K // with the 50µ cap. This should give a much faster response.
Had same prob. with NEC UPC1237 ref. design (330uf with 56K ). I made the combination 10uf with 56K. Didn't had a single false trigger with any bass heavy music, works like a charm.
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