tda7293 chip adopts 15-pin dual-row asymmetric in-line package tda7387ep power amplifier chip parameters , the differential input stage is composed of bipolar transistors, and the driving stage and power output stage use DMOS field effect tube semiconductor technology. Voltage power Different tda8954 operating voltage range is ±15~±45v, at ±41v voltage, rl is 4ωWhen, the output power can reach 2x210w, if connected to btl power amplifier, the output power can reach 420w.
TDA7313 is a CNC audio processing chip with three pairs of inputs and four outputs. The chip is manufactured by deep submicron CMOS technology, including volume, bass, treble, channel equalization, front/back attenuation, loudness processing; In chipsets with multiple selectable gain inputs, there are fewer peripheral circuit components for better performance and reliability. All functions are programmed through the PC bus. TDA7313 is encapsulated in SOP28.
Power amplifier chip TEA2025L and TDA7379 are two common power amplifier chips that have different characteristics and performance in terms of audio amplification. One of the important performance parameters is the conversion rate. TEA2025L is a dual-channel stereo power amplifier chip with a conversion rate of 8V/μs.
TDA7379 amplifier chip maximum output power 2×38W/ 4Ω@18V, 1KHz, 10%, 2×34W/ 8Ω@22V, 1kHz, 10%. The TDA7379 chip has a built-in 4-way power amplifier, which can be very simple to pair BTLForm a double channel. Continuous output current up to 4A and peak current up to 5A (100μs) make it relatively easy to drive 4Ω speakers in BTL connections.
The rated output power is 100W and the maximum operating voltage is 120V. TDA7293 is a high-fidelity power amplifier chip model, TDA7293 is a high-power high-voltage DMOS high-fidelity power amplifier IC produced by ST (SGS-THOMSON) company, with a rated output power of 100W. The maximum operating voltage is 120V.
Power amplifier chip good. The operation is stable. Knowledge expansion. A kind of bullet train1kHz, 10%. The TDA7379 chip has a built-in 4-channel power amplifier, which can be composed of two BTL channels very simply. Continuous output current up to 4A and peak current up to 5A (100μs) make it relatively easy to drive 4Ω speakers in BTL connections.
2, TDA7379 amplifier chip maximum output power 2×38W/ 4Ω@18V, 1KHz, 10%, 2×34W/ 8Ω@22V, 1kHz, 10%. The power conversion efficiency is up to 90%, which has high efficiency and energy saving that can not be compared with traditional analog power amplifiersSince then, it has changed the impression that audio power amplifiers are bulky, power-consuming and large in people's minds. The basic circuit of the digital power amplifier is the long-existing Class D amplifier (called Class D amplifier in China).
3, TDA7377 parameters Operating voltage: 8 ~ 18V Static drain current: 150mA (maximum) Output compensation voltage: 150mV Limit power consumption: 36W output impedance: 4 OHMs tda7379 amplifier chip parameters are output voltage 18V, current 2A, power is 30W, its input voltage is 32V.
4, TDA7379 power amplifierThe maximum output power of the chip is 20kHz, and the flat amplitude-frequency characteristics and good phase-frequency characteristics are obtained. The power conversion efficiency is as high as 90%, and the traditional analog power amplifier is incomparable to the high efficiency and energy saving, which changes the impression of the audio power amplifier in people's minds, which is bulky, power-consuming and large.
5, TDA7379 built-in 4-way power amplifier, can be very simple to form two BTL dual channel.
6, power amplifier chip TEA2025L and TDA7379 are two common power amplifier chips, they have different characteristics and performance in audio amplification. One ofAn important performance parameter is the conversion rate. TEA2025L is a dual-channel stereo power amplifier chip with a conversion rate of 8V/μs.
1, the dual-channel TDA7377 amplifier power is only 20W×2, the power of two 4-inch bass plus two 1-inch treble is far more than 20W×2, and can be connected, but the effect can not be guaranteed. For good effect, the horn power is not greater than the power amplifierThe amplifier power should be more than 2 times the audio power. Use two 10W bass and two 5W treble to form a pair of speakers.
2, generally speaking, if the effect is good, the horn power is not greater than the amplifier power, the amplifier power should be 30% larger than the horn power, so the effect will be better.
3, w power amplifier power 65-80w or so of the speaker (impedance is the same) is better, control the volume when using do not open too large. To obtain good sound quality, the amplifier should leave some reserve power. The general power amplifier is the peak power, and the horn is the average power. Horn bearingSubject to 5-10 quilt peak power. Generally speaking, 10-20W speakers are enough (the resistance should be consistent with the power amplifier).
4, this is an old amplifier, do not know the output power, can only roughly estimate the speaker. Two main speakers can be equipped with 80W, and the rest can be equipped with 50W speakers.