Si824x

Silicon Labs' Si824x audio drivers are isolated Class D gate drivers that power audio systems delivering from 30 W up to 1000 W of audio power. Based on Silicon Labs’ proprietary isolation technology, the Si824x Class D audio drivers incorporate input-to-output isolation, which enables level-translation of signals without additional external circuits. The Si824x audio drivers feature adjustable dead-time control for achieving optimal THD, overlap protection that safeguards against shoot-through current damage, robust immunity to latch-up and high-voltage transients, and lower BOM costs and PCB footprints compared to non-isolated gate drive solutions. See the sound quality performance of the Si824x audio driver over the audible spectrum using the Class D Sound Quality Demonstration.

video clip View Class D Audio Driver & Reference Design Overview

Features

0.5A (Si8241) & 4A (Si8244) peak output current
PWM input
High precision and linear programmable dead-time generator
High latch-up immunity, > 100V/ns
Built-in isolation and level translation in one package
1500 Vrms output-to-output isolation
2500 Vrms input-to-input isolation
Up to 8MHz operation
Wide operating range: -40 to +125 C
Transient immunity > 30 kV/us
RoHS compliant narrow body 16-pin SOIC package

Applications

Home theatre systems
PA systems
Car audio
Guitar amps

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Data Sheet (1)

Document Name	Description	Version	Last Updated
Si824x.pdf	Si824x Data Sheet	0.2	2/10/2011

User Guides (2)

Document Name	Description	Version	Last Updated
Si824xClassD-KIT.pdf	Si824x Class D-KIT User's Guide	0.2	11/17/2010
Si82xx-EVB.pdf	Si82xx Evaluation Board User's Guide	0.1	6/28/2011

Application Notes (1)

Document Name	Description	Version	Last Updated
AN542.pdf	AN542: Performance Improvements in Class D Audio Amplifiers using Si824x Audio Drivers	0.1	10/27/2010

White Papers (1)

Document Name	Description	Version	Last Updated
Si824xWhitePaper.pdf	Si824x White Paper	0.1	10/27/2010

Product Matrix

Part Number	Available Documents	UVLO Voltage	Package	Outputs	Input Type	Isolation Rating	Drive Strength
Si8241BB-B-IS1	Data Sheet	8 V	NB SOIC-16	High Side / Low Side	PWM	2.5 kV rms	0.5 A
Si8241CB-B-IS1	Data Sheet	10 V	NB SOIC-16	High Side / Low Side	PWM	2.5 kV rms	0.5 A
Si8244BB-C-IS1	Data Sheet	8 V	NB SOIC-16	High Side / Low Side	PWM	2.5 kV rms	4 A
Si8244CB-C-IS1	Data Sheet	10 V	NB SOIC-16	High Side / Low Side	PWM	2.5 kV rms	4 A

Training & Resources

Featured Videos

Class D Audio Driver and Reference Design

Si4830 Wheel-Tuned Digital CMOS AM/FM Radio Receiver IC

Featured Web Utilities

Class D Audio Sound Quality Demo

The Class D audio driver interactive demonstration allows you to see the sound quality performance of the Si824x Class D audio driver over the audible spectrum. The demo shows the total harmonic distortion + noise (THD + N) ratio, a universal measure of sound quality for audio amplifiers.

Featured White Papers

Key Requirements for Multi-Tuner Automotive Radio Designs

Automotive OEMs and Tier 1 suppliers understand that consumers expect a superior in-vehicle audio experience and are responding by designing sophisticated infotainment systems. The radio components used in today's vehicles need to be cost-effective while meeting rigorous automotive levels of performance. With the advent of multi-tuner automotive infotainment systems, car radio developers must now consider a wide range of performance requirements and new technologies in their designs.

Designing Wheel-Tuned, Digital-Display Radios with Next-Generation Radio ICs

As a growing number of portable applications such as mobile phones and portable media players integrate the FM radio function, there’s a misconception that traditional radios are no longer needed. In reality, wheel-tuned radios have remained immensely popular. This article will discuss how to design a mid-level wheel-tuned radio with an LCD to display frequencies, and it will explore the practical considerations in selecting audio ICs and display drivers, as well as how to leverage these technologies to deliver the best end-user radio tuning experience. Available in English and Simplified Chinese.

Featured Tutorials and Presentations

Multiband Receiver Family Overview

The Si473x is the industry's first fully integrated, 100% CMOS AM/FM/shortwave/longwave/weather bandradio receiver IC. This family of radio receiverICs provides the space savings and low power consumption necessary for portable devices while delivering the high performance and design simplicity desired for all AM/FM solutions.

Introducing High-Performance FM RDS Data Receiver ICs

The Si4749/06 are 100% CMOS receiver ICs, offering full receive functionality from antenna to RDS/RBDS data for use in the automotive and portable navigation markets. The Si4749/06 is an ideal RDS/RBDS data receiver for Traffic Message Channel (TMC) and Open Data Applications (ODA) applications frequently used in conjunction with GPS functionality.

Audio/Video

Title Content
Si8241/44 Class D Audio Drivers

Features

Applications