TDA7377 class AB car radio amplifier was manufactured by renowned global semiconductor companies like STMicroelectronics which develops cutting-edge semiconductor solutions mainly for various microelectronics applications. So this electronics company has appeared as a pioneer in System-on-Chip (SoC) technology where its products play an essential role in driving the current technological convergence trends. This ICs unique output stage completely complementary architecture including internal fixed gain ensures utmost power performance with a few external components only. So this IC has excellent performance and is used widely in fields like professional audio equipment, car audio systems, home audio systems, etc. Thus, this article introduces the TDA7377 IC in detail to understand it more deeply along with its applications.
What is TDA7377 IC?
The TDA7377 is a class AB-type high-performance car radio amplifier IC used in high-power audio and automotive applications. So this IC operates as a bridge amplifier to drive speakers with up to 14 watts of complete output power for each channel. So it works either in Quad Single Ended or Dual Bridge configuration.
This, the TDA7377 IC assures the maximum possible power performances with decreased component count due to the exclusive completely complementary output stage structure & the fixed gain internally. The on-board clip detector of this amplifier IC simplifies the operation of gain compression thus, its fault diagnostics makes it achievable to detect mistakes throughout car radio set assembly & wiring within the car.
TDA7377 IC Working
The TDA7377 class AB car radio amplifier IC works by amplifying weak electric signals thus, it operates like a bridge amplifier to drive speakers with up to 14 watts of total output power for each channel. So this IC converts audio signals from low-level into high-power outputs by providing high-output power & efficiency.
The TDA7377 IC provides up to 35W at 4Ω impedance for each channel with a 14.4V supply. So this IC has 26dB BTL & 20dB single-ended internal gain. This amplifier IC has a less ICC stand-by mode for silent operation & energy efficiency. Thus, this IC has fault diagnostics to notice mistakes during the assembly & wiring of the car radio set. So, this IC on-board clip detector simplifies the gain compression function.
TDA7377 IC Pin Configuration:
The pin configuration of TDA7377 IC is shown below. This IC includes 15 pins which are discussed below.
TDA7377 IC Pin Configuration
- Pin-1 (OUT-1): It is the first output pin of the IC.
- Pin-2 (OUT-2): It is a second output pin of the IC.
- Pin-3 (VCC): It is a voltage supply pin.
- Pin-4 (IN-1): It is the first input pin of the IC.
- Pin-5 (IN-2): It is a second input pin of the IC.
- Pin-6 (SVR): It is a supply voltage rejection pin.
- Pin-7 (STBY): It is a standby pin.
- Pin-8 (PW GND): It is a power GND pin of the IC.
- Pin-9 (S GND): It is the signal GND pin of the IC.
- Pin-10 (DIAG): It is a diagnostics pin.
- Pin-11 (IN 4): It is the fourth input pin of the IC.
- Pin-12 (IN 3): It is the third input pin of the IC.
- Pin-13 (VCC): It is a positive voltage supply pin.
- Pin-14 (OUT 4): It is the fourth output pin of the chip.
- Pin-15 (OUT-3): It is the third output pin of the chip.
Features & Specifications:
The features and specifications of TDA7377 IC include the following.
- TDA7377 is a class AB car radio amplifier IC.
- It includes 15 pins.
- Its output power capability is high like; 2×35W at 4 ohms speaker.
- This IC uses different configurations like a four-channel audio system or stereo bridge mode.
- It needs less number of external components.
- There is no pop-up sound throughout stand-by operations.
- Its operating voltage supply ranges from 12 to 18V DC.
- It generates high-quality audio output.
- This IC has inbuilt short circuit protection and thermal shutdown.
- It has a 2.0 stereo configuration used mainly for dual-channel audio output.
- It includes four channels.
- Its output type is Stereo (2-channel) or Quad (4-channel)
- Its THD or Total Harmonic Distortion is < 0.1%.
- Frequency response ranges from 20 Hz to 20 kHz (±3 dB).
- Maximum power dissipation is 40 Watts.
- Its standby current is below 1 mAmps.
- Its output impedance is 4 Ohms.
- The package type is Multiwatt15.
- It supports 4 to 8 Ω speakers, a 20 to 120W power range & 3 to 10 floor speakers or bookshelf.
- This IC is silent throughout stand-by operations which ensure smooth audio transitions.
- Its internal gain is 26dB BTL & 20dB single-ended without external compensation.
Equivalent & Other ICs
Equivalent TDA7377 ICs are; TDA7375, TDA7379, TDA2050, TDA2005, TDA7560, E-TDA7377. So, other amplifier ICs are; TDA7851F, TDA7387EP, TDA7561, TB2941HQ, etc.
60Watts Double-Bridge Stereo Amplifier Circuit with TDA7377 IC
A 60Watts double-bridge stereo amplifier circuit using TDA7377 IC is shown below. This is a powerful device, used to amplify audio signal from any audio source & deliver it to audio devices or loudspeakers. So, TDA7377 has become a popular amplifier IC that provides high-quality audio signals. The TDA7377 IC in this circuit delivers up to 60W of power for each channel. So this IC is designed mainly to be used with high-quality audio systems, home theatre systems, car audio systems, audio systems, etc.
Components & Its Connections:
The required components to make this 60Watts double-bridge stereo amplifier circuit mainly include; a TDA7377 IC, 10k resistor, and capacitors like; 0.47uf, 10uf, 47uf, 1000uf, and 100nf.
The connections of this circuit follow as;
Both pins 4 and 5 are connected to the 0.47uf electrolytic capacitor whereas this capacitor at another end is simply connected to the i/p audio source. So the same will happen on the pins 11 & 12. Here, the 6th pin of this IC is grounded with a 47uf capacitor. 10uf and a 10 k resistor is connected to the Stand pin of the IC. Thus, the pin-6 of the IC is a supply voltage rejection pin. Here the input voltage supply is filtered well with a 1000uf electrolytic capacitor & 100nf disc (or) box-type capacitor.
60Watts Double-Bridge Stereo Amplifier Circuit with TDA7377 IC
Working
The 60W double bridge stereo amplifier circuit works by delivering high-quality sound from several sources. This double-bridge stereo amplifier circuit is easy to connect and use with high-quality materials which lasts for a long time. So the inputs of this circuit are from different kinds of sources like smartphones, MP3 players, DVD players, etc. This amplifier circuit can also be used with different speakers like woofers, subwoofers, tweeters, etc.
Here, this amplifier is used in different sound systems like audio systems, home theatre systems, car audio systems, etc. In addition, it can also be used in high-quality sound systems wherever powerful and clear sound is necessary.
So, the 60W double bridge stereo amplifier output will be within bridge mode thus connecting the speaker to the output pins of the IC. So the first speaker connections are pin-1 & 2 whereas the second speaker connections are Pin 14 & 15. The TDA7377 IC is a powerful amplifier that delivers up to 60W of power to make it the perfect choice for high-quality audio systems. Therefore, this stereo amplifier circuit is an excellent choice for anybody who needs high-quality sound within their audio system.
Advantages & Disadvantages
The advantages of TDA7377 IC include the following.
- TDA7377 IC has thermal protection, less distortion; short-circuit protection, low output noise, and high output power.
- This IC has a complementary output stage structure completely.
- It has fixed gain which allows high power performance with fewer components.
- This IC detects mistakes during assembly and wiring of the car radio.
- Its on-board clip detector shortens gain compression.
- It is a versatile audio amplifier IC that works in quad single-ended or dual bridge configurations.
- It has balanced efficiency & good sound quality.
The disadvantages of TDA7377 IC include the following.
- TDA7377 IC has low distortion as compared to TDA7297
- This IC generates a certain amount of heat because of the internal current flow & voltage throughout the operation.
- It requires a stable power supply to function.
- When this IC is connected to the circuit, we should take effective measures to avoid external electromagnetic interference.
- This IC includes two distinct ground leads that are disconnected practically from each other at the level of IC.
Applications
The applications of TDA7377 IC include the following.
- The TDA7377 high-performance audio amplifier IC is used in automotive & high-power audio applications.
- This IC is suitable for in-car audio systems to drive the speakers within the car by providing high-quality audio output.
- This IC is used in TV & home theater systems to upgrade the sound quality to a high level by accurate audio algorithms and superior audio processing technology.
- It is used in professional audio equipment.
- It is used in multimedia speakers, thus it provides sufficient driving force to a speaker with its outstanding output power ability.
- This IC is used to construct power amplifier modules to drive different home speakers like stereo systems, surround sound systems, bookshelf speakers, etc.
Please refer to this link for the TDA7377 IC Datasheet.
Thus, this is an overview of TDA7377 IC which has 14V to 25V wide input voltage and more than 30W power output. So, this IC has several outstanding features like less distortion, outstanding anti-interference performance & high signal-to-noise ratio which make this IC exceptional in the audio field. Its high signal-to-noise ratio and low distortion in terms of sound effects ensure the accuracy and clarity of audio output. So its powerful anti-interference performance assists in eliminating interference from outside factors on the sound effects. Here is a question for you, what is TDA7379 IC?