36 Watt TDA1562Q Audio Amplifier Circuit Diagram

Description

This design utilizes a Philips class-H audio amplifier integrated circuit, capable of delivering 36W Root Mean Square (RMS) or 70W musical power from a 13.8V power supply. The new Mighty Midget Amplifier possesses considerable power, supplying approximately 36W RMS continuously into a 4-ohm load when operating from a 13.8V source. However, the most impressive characteristic is the 70W of output power it can achieve during dynamic audio conditions, making it a truly noticeable device.

As demonstrated in the accompanying photographs and the circuit diagram, the Mighty Midget incorporates a relatively small number of components. It’s constructed on a printed circuit board measuring only 104mm x 39mm. Despite its compact size, this amplifier delivers impressive power output, and the associated noise and distortion levels are quite favorable.

More about components

At the core of the circuit is a TDA1562Q integrated circuit. According to Philips, this device is a monolithic Bridge-Tied Load (BTL) class-H high-efficiency power amplifier. This integrated circuit is a sophisticated device designed for amplifying audio signals efficiently. It's commonly employed in automotive audio systems, portable public address (PA) equipment, and even mains audio applications, such as miniature and mid-sized audio components and television sound systems. It’s packaged in a 17-pin DIL-bent-SIL plastic package and is characterized by its ability to provide high power output while maintaining low distortion and noise.

Circuit diagram:

At the heart of the circuit is the TDA1562Q IC, described by Philips as a "monolithic integrated Bridge-Tied Load (BTL) class-H high-efficiency power amplifier". It comes in a 17-pin "DIL-bent-SIL" plastic package and is not only designed for use in car audio and portable PA work but for mains applications as well; eg, mini/midi audio components and TV sound.

Parts layout:

PCB layout:

Performance: