TDA7377 Class AB Car Radio Amplifier: Pinout, Datasheet pdf and Circuit
35W W Audio Amplifiers 15 pins
The TDA7377 is a new technology class AB car radio amplifier able to work either in DUAL BRIDGE or QUAD SINGLE ENDED configuration. This article is going to explain datasheet pdf, circuit, pinout, power, and other details about the TDA7377 amplifier.

TDA7377 stereo amplifier board test and review
What is TDA7377?
The TDA7377 is a brand-new class AB car radio amplifier that can operate in either a DUAL BRIDGE or a QUAD SINGLE ENDED configuration. The output stage's unique fully complementary structure and internally fixed gain ensure the maximum possible power performance with a minimal component count. Gain compression is made easier with the onboard clip detector. Fault diagnostics allows for the detection of problems made during automobile radio set installation and wiring.
TDA7377 Pinout


TDA7377 Pinout
| Pin No | Pin Name | Description |
| 1 | OUT 1 | Output 1 |
| 2 | OUT 2 | Output 2 |
| 3 | VCC | Collector Supply Voltage |
| 4 | IN 1 | Input 1 |
| 5 | IN 2 | Input 2 |
| 6 | SVR | Supply Voltage Rejection |
| 7 | ST-BY | Stand By |
| 8 | PW-GND | Power Ground |
| 9 | S-GND | Signal Ground |
| 10 | DIAG: | Diagnostics |
| 11 | IN 4 | Input 4 |
| 12 | IN 3 | Input 3 |
| 13 | VCC | Collector Supply Voltage |
| 14 | OUT 4 | Output 4 |
| 15 | OUT 3 | Output 3 |
TDA7377 CAD Model

TDA7377 Symbol

TDA7377 Footprint
Specifications
- TypeParameter
- Number of Pins15
- Part Status
Parts can have many statuses as they progress through the configuration, analysis, review, and approval stages.
Obsolete - Moisture Sensitivity Level (MSL)
Moisture Sensitivity Level (MSL) is a standardized rating that indicates the susceptibility of electronic components, particularly semiconductors, to moisture-induced damage during storage and the soldering process, defining the allowable exposure time to ambient conditions before they require special handling or baking to prevent failures
1 (Unlimited) - TypeClass AB
- Voltage - Supply
Voltage - Supply refers to the range of voltage levels that an electronic component or circuit is designed to operate with. It indicates the minimum and maximum supply voltage that can be applied for the device to function properly. Providing supply voltages outside this range can lead to malfunction, damage, or reduced performance. This parameter is critical for ensuring compatibility between different components in a circuit.
8V~18V - Base Part Number
The "Base Part Number" (BPN) in electronic components serves a similar purpose to the "Base Product Number." It refers to the primary identifier for a component that captures the essential characteristics shared by a group of similar components. The BPN provides a fundamental way to reference a family or series of components without specifying all the variations and specific details.
TDA7377 - Output Type
The "Output Type" parameter in electronic components refers to the type of signal or data that is produced by the component as an output. This parameter specifies the nature of the output signal, such as analog or digital, and can also include details about the voltage levels, current levels, frequency, and other characteristics of the output signal. Understanding the output type of a component is crucial for ensuring compatibility with other components in a circuit or system, as well as for determining how the output signal can be utilized or processed further. In summary, the output type parameter provides essential information about the nature of the signal that is generated by the electronic component as its output.
2-Channel (Stereo) or 4-Channel (Quad) - Operating Supply Voltage
The voltage level by which an electrical system is designated and to which certain operating characteristics of the system are related.
18V - Max Output Power
The maximum output power = the maximum output current × the rated output voltage
35W - Max Output Power x Channels @ Load
Max Output Power x Channels @ Load is a specification that describes the maximum power output that an electronic component, such as an amplifier or audio device, can deliver across a certain number of channels at a specific load impedance. This parameter is important for understanding the capability of the component to drive speakers or other devices effectively. The value is typically expressed in watts and can vary depending on the number of channels being used and the impedance of the load. It helps users determine the compatibility of the component with their audio setup and ensures that the component can provide sufficient power for optimal performance.
35W x 2 @ 4 Ω; 10W x 4 @ 2 Ω - Features
In the context of electronic components, the term "Features" typically refers to the specific characteristics or functionalities that a particular component offers. These features can vary depending on the type of component and its intended use. For example, a microcontroller may have features such as built-in memory, analog-to-digital converters, and communication interfaces like UART or SPI.When evaluating electronic components, understanding their features is crucial in determining whether they meet the requirements of a particular project or application. Engineers and designers often look at features such as operating voltage, speed, power consumption, and communication protocols to ensure compatibility and optimal performance.In summary, the "Features" parameter in electronic components describes the unique attributes and capabilities that differentiate one component from another, helping users make informed decisions when selecting components for their electronic designs.
Depop, Short-Circuit and Thermal Protection, Standby - RoHS Status
RoHS means “Restriction of Certain Hazardous Substances” in the “Hazardous Substances Directive” in electrical and electronic equipment.
ROHS3 Compliant
TDA7377 Features
Dimension: 60×56×50
Output power: 35W+35W
Power supply: DC 9-15V/50-100W
Channel type: 2.0 stereo
Response frequency: 20Hz-20 KHz
Matching speakers: 4-8 20-120W 3''-10'' bookshelf speaker, floor speaker
TDA7377 Usages
1. Connect to speakers
Connect the two wires of the speakers to the audio output port of the power amplifier, the left channel speaker is connected to the LOUT port of the amplifier and the right channel speaker is connected to the ROUT port, the positive connects to "+", the negative connects to "-".
2. Connect to sound source
Use an audio cable with an end of 3.5mm stereo headphone plug and plugin the 3.5 stereo headphone jack of the amplifier.
The other end of the audio cable is connected to the audio source (such as computers, mobile phones, MP3, DVD).
3. Connecting to the power supply
1) Connect to the adapter of the power supply
Use the power supply in which the output is above DC12V3A.
Connect the output cable of the adapter to the 12V port of the power amplifier board.
The positive connects to the "+" of the port while the negative connects to "-".
2) Connect voltage converter
Use the voltage converter in which the output is above AC12V3A.
Connect the two output cables of the converter to the 12V port of the power amplifier board.
Because the output of the converter is alternating current, it is not positive or negative.
4. Play music
Plugin the power, the blue power indicator will light up which means that the power amplifier board starts working.
You can adjust the volume knob according to their preferences.
TDA7377 Test and Application Circuit
The followings are the test and application circuits of TDA7377.

Quad Stereo

Double Bridge

Stereo/Bridge
TDA7377 Protections
Load Dump Voltages surge
Reversed Battery
Output DC Short Circuit protection with Low current when shorted to GND or VCC
Output AC short circuit protection: across the load
Silent Turn On/Off
Thermal shutdown
Load very inductive speakers
Fortuitous Open GND
ESD
TDA7377 Dimensions

TDA7377 Dimensions
TDA7377 Manufacturer
STMicroelectronics is a globally recognized semiconductor company. They are dedicated to developing semiconductor solutions for various microelectronics applications. STMicroelectronics enjoys unrivaled silicon and system expertise, strong manufacturing strength, IP portfolio, and solid relationships with their strategic partners. Based on these advantages, STMicroelectronics has become a pioneer in System-on-Chip (SoC) technology and its products have a positive effect in realizing today's convergence trends.
Datasheet PDF
- Datasheets :
What is the use of TDS7377?
The UTC TDA7377 is a class AB car radio amplifier for car radio; it can work either in a dual bridge or quad single-ended configuration. The exclusive fully complementary structure of the output stage and the internally fixed gain guarantees the highest possible power performances with few external components.
What type is a TDA7377 radio amplifier?
It is an example of a Power Amplifier. The TDA7377 is a brand-new class AB vehicle radio amplifier that can operate in either a DUAL BRIDGE or a QUAD SINGLE ENDED configuration.
What is the output power of the TDA7377 power amplifier IC?
TDA7377 can form a dual-channel BTL circuit with an output power of up to 2x20W.
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