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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. [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 ℃ 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
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.