Compare the Differences Between TDA7377 and TDA7388
12 October 2023
Ⅴ. TDA7377 vs TDA7388: Technical parameters
Ⅵ. TDA7377 vs TDA7388: Features
Ⅶ. TDA7377 vs TDA7388: Power output
Ⅷ. TDA7377 vs TDA7388: Number of channels
Ⅸ. TDA7377 vs TDA7388: Pin configuration and functions
Ⅹ. TDA7377 vs TDA7388: Applications
Among the core components of audio equipment, amplifiers undoubtedly occupy a crucial position. Serving as the driver for audio signals, they exert a direct influence on sound quality. Within the diverse array of amplifiers available, Class AB power audio amplifier ICs enjoy widespread popularity in today's market. This article aims to provide an extensive exploration of TDA7377 and TDA7388, two representative Class AB power audio amplifiers.
An amplifier is an electronic device that increases the power of a signal (a time-varying voltage or current) and consists of a tube or transistor, a power transformer, and other electrical components. It is a two-port electronic circuit that uses power from a power supply to increase the amplitude (amplitude of a voltage or current) of a signal applied to its input, thereby producing a proportionally larger amplitude signal at its output. It is used in various devices such as television, radio, radar, communications and automatic control.
The TDA7377, an innovative 2x30W dual/quad audio power amplifier, was initially developed by STMicroelectronics. This amplifier finds extensive application in the realm of car audio systems. One of its notable features is its flexibility, as it can be configured to deliver audio to various setups. It can be employed with dual bridged outputs, efficiently powering two speakers, or it can be used with unbridged quad single-ended outputs, catering to four speakers.
It boasts a professional and fully complementary output stage structure. This unique design ensures that even when operating at high power levels, the output remains free from distortion, guaranteeing an exceptional audio experience. Additionally, this amplifier is equipped with four independent channels, which offers immense versatility in audio setups. It can be used in single or bridge mode applications, accommodating either four or two speakers, depending on your specific requirements. The TDA7377 has impressive specifications, with a maximum static drain current of 150mA, an output compensation voltage of 150mV, and an static power loss of 90dB, all contributing to its exceptional performance and reliability.
Replacement and equivalent：
• LM386
• TDA2030
• TDA7297
• TDA7379
The TDA7388 audio amplifier is classified as a Class AB amplifier and is primarily utilized in the automotive industry, particularly in car radios. This versatile component comes housed in the Flexiwatt25 package, featuring a power dissipation capability of 80 watts and a remarkable gain of 26 decibels. Operating on a single power supply voltage of 14.4 volts, the TDA7388 employs MOSFET amplification technology to provide a potent 4-channel Hi-Fi power amplifier with an output of 41 watts per channel. This amplifier is designed to deliver exceptional audio quality, boasting low distortion, minimal noise, and impressive resistance to interference.
The amplifier also incorporates several protective features, including safeguards against AC and DC output short circuits, as well as temperature protection. These protective mechanisms ensure the durability and reliability of the device, making it an ideal choice for demanding automotive applications. TDA7388 pin is fully compatible with the TDA7388/TDA7384/TDA7386 of the original Italian semiconductor. This compatibility facilitates ease of integration and allows for seamless interchangeability with other components, simplifying the design and manufacturing processes for engineers and developers in the automotive audio industry.
Replacement and equivalent：
• TDA7854
• TB2941HQ
• TDA7561
• TDA7851F
1. Features of TDA7377
• Wide range of applications: Suitable for various audio systems, including home theaters, car audio, etc.
• Fewer peripheral components: TDA7377 has a compact design and requires fewer peripheral components, simplifying the circuit design and production process.
• Power output: The TDA7377 audio processing chip adopts a dual four-way power output design, allowing it to drive larger-scale speaker systems. This powerful chip ensures excellent audio performance in any environment.
• Low cost: While ensuring performance, its cost is relatively low, making it a cost-effective audio power amplifier chip.
• Small size and light weight: Thanks to its minimal peripheral components, the device boasts a compact and lightweight design, which serves to effectively minimize its overall dimensions and weight.
• High efficiency and low distortion: TDA7377 has the characteristics of high efficiency and low distortion, which can maintain the quality of audio signals and avoid distortion or noise.
2. Features of TDA7388
• Multiple protection: including overvoltage protection, short circuit protection, overheating protection and power supply reverse polarity protection to ensure safe operation of circuits and speakers.
• Low distortion: The TDA7388 audio amplifier boasts exceptional distortion-reducing capabilities, ensuring the delivery of premium-quality audio output that maintains the integrity and precision of the original audio signal. This remarkable feature results in crystal-clear, distortion-free sound, allowing listeners to enjoy a rich and immersive audio experience.
• Channel independent control: Each audio channel can independently control volume and other parameters, making it suitable for multi-channel audio systems.
• Equipped with mute and noise cancellation functions: It also has mute and noise cancellation functions, which can improve the performance of the audio system and reduce the bounce noise when starting up and shutting down.
• High output power: The TDA7388 represents a robust four-channel audio power amplifier, boasting an impressive peak output power of 4 x 41 watts per channel when operating with a 4-ohm load and a 14.4 V supply voltage. This substantial power output equips it to effectively drive numerous speakers or horns.
The TDA7377 is a versatile 2x35W dual-bridge amplifier, capable of providing a robust 35 watts of power per channel, whether it's the left or right speaker, into a 4-ohm load. This amplifier is designed with low-power audio systems in mind, making it an excellent choice for smaller to medium-sized car audio setups where balanced audio output is required.
With the ability to deliver a substantial 41 watts per channel into a 4-ohm load across all four channels, the TDA7388 is an amplifier suited for large car audio systems demanding higher power levels. This increased wattage ensures that your audio setup can produce a more substantial sound output, making it ideal for those who crave a powerful and immersive audio experience while on the road.
The TDA7377 is equipped with two separate channels and is ideal for stereo sound systems, typically employed for both front and rear speakers.
The TDA7388 boasts four independent channels, making it a preferred choice for installations in the driver's cab with multiple speakers. This configuration allows for more intricate sound localization and channel options, resulting in a more immersive audio experience.
Pin functions refer to the different functions of the chip's interface, such as heat sink, grounding, power on and off, mute, temperature detection and other functions. The following are the pin names and functions of TDA7377 and TDA7388 respectively.
1. Pin configuration of TDA7377
Pin1 (OUT 1): Output 1 Pin9 (S-GND): Signal Ground
Pin2 (OUT 2): Output 2 Pin10 (DIAG): Diagnostics
Pin3 (VCC): Collector Supply Voltage Pin11 (IN 4): Input 4
Pin4 (IN 1): Input 1 Pin12 (IN 3): Input 3
Pin5 (IN 2): Input 2 Pin13 (VCC): Collector Supply Voltage
Pin6 (SVR): Supply Voltage Rejection Pin14 (OUT 4): Output 4
Pin7 (ST-BY): Stand By Pin15 (OUT 3): Output 3
Pin8 (PW-GND): Power Ground
2. Pin configuration of TDA7388
Pin1 (TAB): Connect to ground Pin14 (IN4): Input of Channel 4
Pin2 (P-GND2): Power ground of Channel 2 Pin15 (IN3): Input of Channel 3
Pin3 (OUT2-): Inverting Output of Channel 2 Pin16 (AC-GND): AC ground
Pin4 (ST-BY): Stand-by Pin17 (OUT3+): Non-Inverting Output of Channel 3
Pin5 (OUT2+): Non-Inverting Output of Channel 2 Pin18 (P-GND3): Power ground of Channel 3
Pin6 (VCC): Supply Voltage Pin19 (OUT3-): Inverting Output of Channel 3
Pin7 (OUT1-): Inverting Output of Channel 1 Pin20 (VCC): Supply Voltage
Pin8 (P-GND1): Power ground of Channel 1 Pin21 (OUT4+): Non-Inverting Output of Channel 4
Pin9 (OUT1+): Non-Inverting Output of Channel 1 Pin22 (MUTE): Mute
Pin10 (SVR): Supply Voltage Rejection Pin23 (OUT4-): Inverting Output of Channel 4
Pin11 (IN1): Input of Channel 1 Pin24 (P-GND4): Power GND of Channel 4
Pin12 (IN2): Input of Channel 2 Pin25 (HSD): No Connection
Pin13 (S-GND): Signal ground
The TDA7377 integrated circuit is commonly used in automotive mainframes and amplifiers, and is a universal solution for powering small car speakers. Its design is most suitable for mid range and high-frequency drivers. However, it is limited in applications involving subwoofers or high-power audio requirements.
The TDA7388 is more powerful than the TDA7377 and can be used in car audio systems to drive larger speakers, subwoofers, or multiple speakers.
Frequently Asked Questions
1. What is the TDA7388 IC?
The TDA7388 is a 4-channel audio amplifier IC designed for use in car audio systems. It can drive up to four speakers and is known for its high output power and reliability.
2. What is the equivalent of TDA7377?
It can be replaced by JRC4558, TL082, or NE5532.
3. What are the key features of the TDA7377?
The TDA7377 offers features like short-circuit and thermal protection, low distortion, high output power, and low output noise, making it suitable for high-quality audio applications.
4. What is the equivalent of TDA7388?
The equivalent amplifier ICs for TDA7388 is TDA7851F, TDA7561, TDA7387EP, and TB2941HQ .
5. What is the purpose of a dual bridge amplifier like the TDA7377?
A dual bridge amplifier is designed to drive two separate speaker channels, such as those in a stereo audio system. It provides independent amplification for the left and right audio channels.
