Audio amplifier circuit

MOS power IC full range

Industrial Router Crystal 3.2*2.5mm 3225 26M (26.000MHZ) 12PF 10PPM 20PPM 30PPM

Photocoupler

Audio amplifier circuit

AN7115 audio power amplifier circuit

The limit parameters are: Vcc=13V, the dissipated power (without heat sink) is 1.2W, and the condition with heat sink is 2.25W. Operating temperature -20-70 ° C, suitable for small portable tape recorders and audio equipment for power amplifiers.

AN7114 audio power amplifier circuit

The limit parameters are: Vcc=11V, the dissipated power (without heat sink) is 1.2W, and the condition with heat sink is 2.25W. Operating temperature -20-70 ° C, suitable for small portable tape recorders and audio equipment for power amplifiers.

BA313 with ALC recording and playback circuit

Wide range of automatic level control, wide operating voltage range (3-12V), high gain, low distortion, low noise.

BA328 Stereo Preamplifier

The BA328 limit parameters are as follows: maximum supply voltage 18V, maximum power consumption: 540mW, operating temperature: -25-70 °C.

BA532 audio power amplifier circuit

When the power supply voltage is 13.8V, the 8Ω load impedance, when THD=10%, the output power can reach 5.8W, the ripple rejection ratio is up to 40dB, and the pin is the same as BA511A and BA521. It is commonly used in car stereo receivers, power output circuits in radios, televisions and tape recorders.

BA536 4.5W dual channel power amplifier circuit

The output power is 4.5W per channel (4Ω load impedance, 12V supply voltage), 5.5W (3Ω load impedance, 12V supply voltage). The ripple rejection ratio is 55dB, the distortion is THD=1.5% (Po=0.5W), the crosstalk is less than 57dB, and the operating voltage is 5-12V, which can conveniently form the BTL circuit.

Limit parameters: Vcc=18V, power consumption: working temperature: -20-75 °C.

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. At 13.2V power supply voltage, 5.8W output power can be obtained at 4Ω load THD=10%. . At the time of BTL connection, an output power of 17 W can be obtained under the same conditions as above. It is suitable for audio equipment such as portable, desktop mono and stereo two-channel recorders. It adopts 12-lead single-in-line plastic package structure, and its appearance is shown in Figure 1.

[1]. Harmonic distortion is small, no more than 1% at 100Hz-10kHz.

[2]. The circuit has a surge protection circuit inside.

[3]. There is a thermal cut-off protection circuit inside.

[4]. There are few external components.

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

HA1377 electrical parameter parameter name test condition minimum value typical value maximum unit no signal current Vin=0V (per channel)-80160IQmA input bias voltage Vin=0V output open circuit -40VBmV voltage gain Vin=2.45mV535557Gv (dB) voltage Gain deviation Vin=2.45mV--±1.5ΔGv(dB) rated output power THD=10% Vcc=13.2V, RL=4Ω

THD=10% Vcc=13.2V, RL=2Ω5.0

-5.8

9.0--Harmonic distortion Pout=0.5W-0.151.0THD(%) Noise output Rg=10kΩ, BW=20Hz-20kHz--2.0WBN(mV) Power supply ripple rejection f=500Hz, Rg=600Ω3040-SVR(dB High-end cutoff frequency Vin=-46dBm, gv=-3dB (f=1kHz parameter)-25-f(kHz)(dB) crosstalk f=500Hz, Rg=600Ω4058-CT(dB) HA1377 limit parameter parameter name limit value Unit power supply voltage 18Vcc (V) No signal when the power supply voltage 26 (30sec) Vcc (DC) (V) Output current 4.5Io (peak) (A) Dissipated power 15PT junction temperature 150Tj (°C) Operating temperature -20-+70Topr (°C) Storage temperature -55-+125Tstg (°C)

The HA1377 and the HA1377A are in the same package and have the same external dimensions and pin functions. The electrical parameters and application diagrams are also the same and can be interchanged under normal circumstances. The difference is that HA1377A can be used for BTL connections, while HA1377 cannot be used for BTL connections.

The TDA2030 is an audio power amplifier circuit manufactured by Telefunken. It is a V-type 5-pin single in-line plastic package. As shown in Figure 1, the shape of the pin can be divided into H type and V type. The integrated circuit is widely used in car stereo receivers and medium power audio equipment, and has the characteristics of small volume, large output power and small distortion. And has an internal protection circuit. Italy SGS company, American RCA company, Japan Hitachi company, NEC company, etc. have similar products. Although their internal circuits are slightly different, the pin position and function are the same and can be interchanged.

[1]. There are very few external components.

[2]. The output power is large, Po=18W (RL=4Ω).

[3]. The ultra-small package (TO-220) can increase the assembly density.

[4]. The boot impact is minimal.

[5]. Contains various protection circuits, so the work is safe and reliable. The main protection circuits are: short circuit protection, thermal protection, grounding accidental open circuit, reverse polarity of power supply (Vsmax=12V) and backlash of load bleeder voltage.

TDA2030 limit parameter parameter name limit value unit power supply voltage (Vs) ± 18V input voltage (Vin) VsV differential input voltage (Vdi) ± 15V peak output current (Io) 3.5A dissipated power (Ptot) (Vdi) 20V working junction temperature (Tj)-40-+150°C storage junction temperature (Tstg)-40-+150°C

The TDA2030 has a load bleeder voltage kickback protection circuit. If the power supply voltage peak voltage is 40V, an LC filter must be inserted between the 5 pin and the power supply to ensure that the pulse train on the 5 pin is maintained within the specified amplitude.

Thermal protection: Thermal protection has the following advantages: it can easily withstand the overload of the output (even for long periods of time), or it can be protected when the ambient temperature exceeds.

The heat sink can have a smaller safety factor than a normal circuit. In the event that the junction temperature is exceeded, there will be no damage to the device. If this happens, Po= (and of course Ptot) and Io are reduced.

Printed circuit board design must take into account the decoupling of the ground and output, because these lines have large currents.

There is no need for insulation between the heat sink and the assembly. The length of the lead should be as short as possible. The soldering temperature should not exceed 260 ° C for 12 seconds.

Although the TDA2030 requires few components, the components selected must be quality-assured components.

TDA7375 is a surround sound power amplifier circuit for vehicles. It is widely used in car audio circuits and also used in multimedia audio equipment. It has the following features: High power output:

2x40W (MAX/4Ω)

2x35W/4Ω EIAJ

2x25W @4Ω, 14.4V, 1kHz, THD=10%

Minimal external components

No external damping capacitor required

Internal fixed gain / 26dB BTL

Boot without impact noise

DC-AC short circuit protection

Soft start circuit

Internal overload over temperature protection

Battery polarity switching circuit

Load sensing circuit

TDA7375 internal block diagram

TDA7375 typical application circuit