What Kinds of Protection in Sanway Power Amplifier?

Five kinds of protection in Sanway Audio power amplifier to provide reliable and safety protection for your sound system.

 

SOFT START PROTECTION

 

In audio equipment with a large current draw, when the power is turned on, the current flowing through it can reach 4-10 times the average current value, which is an impact on the power grid and the equipment itself. In severe cases, the equipment will be damaged.

 

At this time, the soft-start circuit can suppress the influx of current at the moment of the device switching, so that it can smoothly reach the normal function of protecting the device and not causing fluctuations in the power grid. The negative temperature characteristic of Thermistors (NTC) is usually used to achieve this function.

 

Sanway Audio FP series power amplifier: Class TD technology, 2 ohms stable long term load. Suitable for on-site sound reinforcement system, fixed installation, etc.

 

 

 DC PROTECTION

 

When the power amplifier output stage is damaged or the static offset is shifted, it is possible to deliver a DC signal. For the speaker, its working method only produces impedance for the AC signal, and for the DC signal it does not produce any impedance (equal to zero impedance), then the current is infinite, so the coil of the speaker is equivalent to the DC signal A heating wire will be burned quickly.

 

Therefore, accurate and fast DC protection circuit is very important. The starting value of the DC protection of the power amplifier is usually set at 2V. When it is greater than or equal to this value, the power amplifier will cut off the output to protect the speaker. Of course, some power amplifiers will cut the output by burning the built-in DC fuse.

 

If the DC protection circuit of a power amplifier is normal, but the coil of the speaker is burned out, there are only two reasons: the power input to the speaker is too large, or the signal output from the power amplifier is clipped and becomes a square wave.

 

Sanway Audio DSP power amplifier: integrated amplification and digital processor. 2 ohms long term load stable.

 

OVER-CURRENT PROTECTION

 

When the load of the power amplifier is too low but it has not reached the short-circuit state, the short-circuit protection will not operate at this time, but the output current will be very large beyond the safe use value of the power amplifier. At this time, the over-current protection circuit will intervene in the work. The usual practice Yes: Control the input voltage and output current so that the power amplifier always works within a safe range.

 

OVER-HEATING PROTECTION

 

The well-designed power amplifier will not cause overheat protection under normal use, and will only act when the external use environment is bad or the internal fault occurs. The hottest place of the whole power amplifier is the C pole (collector) of the output stage transistor, so the temperature sensor for overheat protection is generally installed closest to the C pole of the transistor or the hottest place on the radiator.

 

The threshold for overheating protection is generally 95°C and 105°C. The extreme temperature of the transistor is 105°C.

D20KQ and D20K 20000W 4 channel power amplifier with innovative high-efficient cooling system.

DISTORTION COMPRESSOR 

The input level of audio equipment has a specified range. If it exceeds this range, the signal will be truncated, and in severe cases it will become a square wave. The function of the distortion limiter is to ensure that the level of the input signal is always controlled within the linear working area allowed by the audio equipment. The general standard is to start when THD1%.