STMicroelectronics AN3959 STA381BW/STA381BWS Application Note

This application note describes how to connect the STA381BW/STA381BWS 2.0-channel demonstration board, how to evaluate its performance with significant electrical curves, and how to avoid critical issues in the PCB schematic and layout.

Brand: STMicroelectronics
Category: amplifier
Document type: Application Note
Language: English
Pages: 65
File format: PDF
File size: 4.2 MB
Published: 06 August, 2012
Updated: 30 September, 2023
Models: STA381BW, STA381BWS
MD5 checksum: EE7009FBE904D5FB0D0E45819EDE20C2
PDF: STMicroelectronics AN3959 STA381BW/STA381BWS Application Note PDF

About this manual

The document details the STA381BW/STA381BWS 2.0-channel demonstration board, which is configured for 2.0 BTL channels and releases up to 2 x 20 W into 8 ohm at 18 V supply voltage. It serves as a total solution for the digital audio power amplifier.

What's inside

Functional description
Connections
Output configuration
Schematic and block diagrams
Power section test results
Analog section test results
Thermal performance
Design guidelines
Software setup
Examples of code

Frequently asked questions

What is the operating voltage range for the DC power supply?

The application note states that the DC power supply must have an operating range from 4.5 V to 25.5 V.

What are the dimensions or ratings for the output filter resistors?

The demonstration board uses two resistors with a value of 47 ohm each in the optional line/HP output path.

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