Application circuit of HA1392

The HA1392 audio power amplifier integrated circuit produced by Japan's Hitachi Company is ideal in terms of performance indicators and appearance structure design. It has a wide voltage application range; internal thermal protection, noise suppression, OTL mid-point balance, etc.
are well designed; output It has strong load capacity, moderate frequency bandwidth and moderate power, simple peripheral circuits, and dual input and output. It
can be called a superior audio power amplifier IC. It is not only used in many famous brand radio cassette players, but also in audio
equipment During maintenance, it has become a powerful power amplifier circuit.
    The interior of HA1392 is composed of the same two power amplifiers and noise suppression and other functional circuits. The input adopts a double-ended differential circuit
, and the final stage is a complementary output power amplifier. It adopts a single-in-line 12-pin plastic package. The functions of each pin are: 1 - feedback terminal,
}o human terminal, 3 - decoupling, 4 - squelch, 5 - hoop terminal, 6 - feedback terminal, 'Bu Output, 8 is bootstrap, } is ground,
10 is power supply, 11 is bootstrap, 12 is output.
    The electrical characteristics of HA1392 are: power supply voltage 12V, quiescent current 36mA, voltage gain Gv=46dB, output
power 4.3W (RL=4n), harmonic distortion is set to ∞=0.25%, when BTL connection (RL=80,, Vc=20V), Po=
22Wo