HA1377 audio power amplifier circuit-EEWORLD

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HA1377 is a power amplifier integrated circuit produced by Hitachi, Japan. It has two sets of power amplifier circuits on a silicon chip, with high output power. Under 13.2V power supply voltage, it can obtain 5.8W output power when THD=10% at 4Ω load. When connected in BTL, it can obtain 17W output power under the same conditions. It is suitable for portable, desktop mono and stereo dual-channel recorders and other audio equipment. It adopts 12-lead single-in-line plastic package structure, and its appearance is shown in Figure 1.

Circuit features:

    [1]. Low harmonic distortion, no more than 1% at 100Hz-10kHz.

    [2]. Internal surge protection circuit.

    [3]. Internal thermal cut-off protection circuit.

    [4]. Few external components.

Typical application circuits and electrical parameters:

Figure 2 is a typical application circuit of HA1377 in dual-channel operation, Figure 3 is a typical application circuit of BTL connection, Table 1 is the electrical parameters of HA1377, and Table 2 is the limit parameters.

HA1377 dual-channel typical application circuit

HA1377 electrical parameters
Parameter name	Test conditions	Minimum	Typical Value	Maximum	unit
Current when no signal	Vin=0V (each channel)	-	80	160	I _Q mA
Input bias voltage	Vin=0V	Output open circuit	-	40	V_BmV
Voltage Gain	Vin=2.45mV	53	55	57	Gv(dB)
Voltage gain deviation	Vin=2.45mV	-	-	±1.5	ΔGv(dB)
Rated output power	THD=10% Vcc=13.2V，RL=4Ω THD=10% Vcc=13.2V，RL=2Ω	5.0 -	5.8 9.0	-	-
Harmonic distortion	Pout=0.5W	-	0.15	1.0	THD(%)
Noise Output	Rg=10kΩ,BW=20Hz-20kHz	-	-	2.0	WBN(mV)
Power supply ripple suppression	f=500Hz,Rg=600Ω	30	40	-	SVR(dB)
High Cutoff Frequency	Vin=-46dBm,gv=-3dB(f=1kHz parameter)	-	25	-	f(kHz)(dB)
Crosstalk	f=500Hz,Rg=600Ω	40	58	-	CT(dB)

HA1377 Limit Parameters
Parameter name	Limit value	unit
Supply voltage	18	Vcc(V)
Supply voltage when no signal	26(30sec)	Vcc(DC)(V)
Output Current	4.5	Io(peak)(A)
Power dissipation	15	P_T
Junction temperature	150	Tj(℃)
Operating temperature	-20-+70	Topr(℃)
Storage temperature	-55-+125	Tstg(℃)

Instructions for use:

HA1377 and HA1377A are the same package, with the same dimensions, pin function arrangement, electrical parameters and application diagrams. They are generally interchangeable. The difference is that HA1377A can be used for BTL connection, while HA1377 cannot be used for BTL connection.

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