[Photo] 6-8W dual audio power amplifier circuit HA1394

HA1392 is a dual 6-8W audio power amplifier integrated circuit, which is a product produced by Hitachi, Japan. When Vcc = 25V RL = 8Ω, the output power is 8.2W per channel, THD = 15%. Suitable for combined stereo sound system and TV audio amplification, HA1394 is a 12-lead single in-line plastic package structure, the shape is shown in Figure 1.
Circuit characteristics:

[1]. Dual audio power amplification: 7-8.2W / per channel.

[2]. Few external components (11 capacitors, 6 resistors).

[3]. Wide working power supply voltage, 18-35V.

[4]. Low noise and low distortion.

[5]. There is an overheat protection circuit.

HA1394 outline drawing
[5]. The output power is large. When the load is 4Ω, the 12V power supply can output 4.3W power per channel, and the 15V power supply can output 6.8W power (THD = 10%).

[6]. There is a thermal protection circuit inside.

Typical application circuit and electrical parameters:

HA1394 consists of two independent power amplifiers, and its typical application circuit is shown in Figures 2 and 3.
HA1394 electrical parameters
parameter name symbol Test Conditions Minimum value Typical value Maximum unit
Quiescent Current IQ Vin = 0V (two-way) - 80 150 mA
Input resistance Rin f = 1kHz - 100 - kΩ
Voltage gain Gv (dB) f = 1kHz - 40 - dB
Voltage gain difference ΔGv (dB) f = 1kHz - - 1.5 dB
Mono output power Pout RL = 8Ω, THD = 5% 7.0 8.2 - W
Total harmonic distortion THD Pout = 1W, f = 1kHz 0.04 0.8 - (%)
Noise output NO Rg = 10kΩ, BW = 20Hz-20kHz - 0.22 1.0 mV
Crosstalk CT f = 1kHz, Rg = 600Ω 50 62 - dB
Voltage gain ratio SVR f = 100Hz, Rg = 600Ω 45 57 - dB
Frequency response fL
fH
ΔGv = -3dB low
f = 1kHz high
-
-
40
80
-
-
Hz
kHz
HA1394 limit parameters
parameter name symbol Limit value unit
voltage Vcc 35 V
Mono output current To (peak) 4.5 A
Power dissipation PT 15 W
Junction temperature Tj 150 ℃
Topr Operating temperature -20- + 70 ℃
Storage temperature Tstg -55- + 125 ℃
HA1394 typical application circuitOne
HA1394 typical application circuit 2
Note: After the power is turned on, when connecting the speaker, two 220Ω resistors can be added as the charging circuit of the output capacitor to protect the integrated circuit.
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