30Wx2 power connector

rK465 is a dual-channel thick film integrated amplifier circuit. Its typical operating characteristics are: working power supply voltage
±28V, when the load is RL=Shu and the signal source internal resistance Rs:=600fl, it can output a sinusoidal average power of 30W×2
. The frequency response is: 20Hz, ~ 20kHz, and the harmonic distortion is 0.08%. When the power supply voltage is ±25V, and the load
RL=4fl, the output power can reach 40W×2 with a distortion of 0.2%. When the output power is 1w, the frequency response
can reach 10H-100kHo. Its input impedance is 32kSl.
    Figure 2-77 is its typical application circuit. It can be used as a 30W×2 power connector. In the circuit,
non-polar capacitors can be used for cl and island, and C2.clo is a bypass capacitor, which is used to filter out high-frequency noise. The capacity should not be too large to avoid
high losses. C4 and C12 are compensation capacitors, used to eliminate self-excitation. If there is no self-excitation, it can be omitted. o Island, C14 is
the decoupling capacitor of the power output stage. R7, R3, C3 and Rl" Ri2.cll form the feedback system of the circuit. , which can determine
the gain of the circuit. Island, C13 is the bootstrap capacitor.
    The input impedance of the circuit is 30kfl, the input sensitivity is 150mV, the voltage gain is 40dB, the frequency response is 20Hz ~
20kHz, the harmonic distortion is 0,08%o the power supply voltage ± (25 ~35)V. The output power
of this power amplifier circuit is moderate and easy to make. It can be used as a power connector for home audio combinations, karaoke equipment or VCD machines. Since the gain is as high as 40dB and the input
sensitivity is high, the preamplifier can be omitted and directly Connect to the output terminals of karaoke machines, VCD machines, video recorders, etc.