The SL6310 chip is a powerful operational amplifier on which a low-frequency amplifier with an output power of 500 mW can be assembled.A microchip is made in a surface-mounted housing with 8 pins.The supply voltage of the chip is from 4.5 to 13.6 Volts.The output power at a load of 8 ohms with a power supply of 9 Volts is 400 mW with a distortion factor of 0.4-3%.Pins 7 and 8 are MUTE, that is, mute and I did not use them in the amplifier circuit.
The current consumption in the silent mode is from 5 to 7 mA.Output 2 is inverting.The gain of the chip can be set by the ratio of the resistance of the resistors R2 + R4 / R3.The capacitor C3 determines the low frequency decay point.
I assembled a low-frequency amplifier circuit on this chip and tested it.At the input, I sent a signal to a sinusoid with an amplitude of 200 mV, and at the input of the I put a 4k7 variable resistor to adjust the signal level.I connected a resistor with a resistance of 4 ohms to the load.At a frequency of 1000 Hz and with an input signal of 86 mV, the undistorted output power was 600 mW.The chip will heat up at this power.In general, the amplifier works well up to frequencies of 50 kHz, then the signal amplitude decreases and at a frequency of 100 kHz it will drop by a third.
Result.The chip as an amplifier is quite good, when listening to radio broadcasts, no noticeable wheezing and distortion was heard.It is problematic to find it on sale, and the inscription on the GPS case has nothing to do with navigation)).
