STMICROELECTRONICS TDA7377 Quad Audio Power Amplifier IC, Class AB, 20W, 8V to

The STMICROELECTRONICS TDA7377 is a class AB quad power amplifier integrated circuit designed for demanding in-car audio applications. Utilising new technology, this versatile chip can be configured to work either as a dual bridge or quad single-ended amplifier, offering design flexibility for various audio system layouts. Its exclusive fully complementary output stage and internally fixed gain ensure superior power performance with a minimal external component count, simplifying circuit design and improving reliability.

This amplifier incorporates a comprehensive suite of protection features to ensure stable operation in the challenging automotive environment. These include output AC/DC short circuit protection with a soft short at turn-on, overrating chip temperature protection with a soft thermal limiter, and load dump voltage surge protection for handling very inductive loads. It is also safeguarded against fortuitous open ground, reversed battery, and electrostatic discharge (ESD), making it a robust choice for automotive use.

An on-board clip detector simplifies gain compression operations, while fault diagnostics aid in detecting mistakes during car radio assembly and in-vehicle wiring. The ST-BY function is CMOS compatible and operates without any audible popping noise. With a wide supply voltage range from 8V to 18V and a low maximum quiescent drain current of 150mA, it is efficient and suited to vehicle electrical systems.

The TDA7377 delivers impressive audio performance, with a supply voltage rejection of at least 50dB and typical crosstalk of 70dB, ensuring clear, channel-separated sound. It is housed in a vertical Multiwatt package with 15 pins for through-hole mounting, providing a secure physical and electrical connection.

Key Features & Specifications

• Amplifier Type: Class AB, Quad/Stereo
• Output Power: Configurable for 35W x 2 channels @ 4 Ohm or 10W x 4 channels @ 2