Product category:
Analogue and Mixed Signal ICs
News Release from: International Rectifier | Subject: IRS2092 chipset
Edited by the Electronicstalk Editorial
Team on 04 October 2007
Chipset creates compact Class D audio
Audio chipset targets medium-power high-performance Class D amplifiers from 50 to 500W.
International Rectifier has introduced a chipset featuring the new IRS2092 integrated audio driver IC with protected PWM switching and IR's full complement of digital audio MOSFETs The chipset targets medium-power high-performance Class D audio amplifiers from 50 to 500W in home theatre, home stereo, active speaker, musical instrument and professional audio applications
This article was originally published on Electronicstalk on 15 Feb 2001 at 8.00am (UK)
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"IR's new chipset brings the audio efficiency and size advantages of Class D to high performance amplifiers, significantly shrinking the overall board area required by Class AB designs, without compromise to audio performance", says Stephane Ernoux, Marketing director for IR's audio products.
"Better still, the IC simplifies the designer's job by delivering a flexible "building block" approach complete with protection, deadtime, and PWM modulator which can easily scale to address changing design needs by simply replacing MOSFETs", he adds.
The new chipset forms a Class D audio solution that is much smaller than a comparable Class AB design.
Further reading
MOSFETs improve power density on both sides
New from International Rectifier are two TO-220-packaged HEXFET power MOSFETs that maximise power density and performance in primary- and secondary-side DC/DC convertor circuits.
Rad-hard MOSFETs protect and survive
With high radiation hardness and unparalleled single event effect (SEE) immunity, International Rectifier's new R5 MOSFETs are well suited for systems that must survive penetrating gamma rays.
In a 100W application, for example, the IRS2092 IC and IRF6645 DirectFET MOSFETs reduce board size by 60% and eliminate 20% of the parts from the typical bill of materials.
Based on a half bridge topology, the new audio driver IC integrates four essential functions for Class D design implementation including error amplifier, PWM comparator, gate driver, and robust protection circuitry.
As a result, this compact 16-pin IC offers high noise immunity and reduced start and stop click noise, while greatly reducing some of the most complicated and costly design tasks such as overload protection.
Key IRS2092 features include an analogue PWM modulator with frequency up to 800kHz, programmable bidirectional over-current protection (OCP) with self-reset control, under-voltage lockout protection (UVLO), and programmable preset deadtime for a scalable power design.
The IC may be paired with an extensive range of digital audio MOSFETs addressing output power from 50 to 500W.
These MOSFETs, part of IR's IRFI4x, IRFB422x, and DirectFET families, have been optimised around parameters critical to audio performance such as efficiency, THD, and EMI.
The IRAUDAMP5 reference design speeds development and evaluation.
Based on the IRS2092 IC and the IRF6645 DirectFET power MOSFETs, the two-channel design is a 120W half-bridge power amplifier which may be scaled for power and number of channels, and requires no heatsink under normal operating conditions.
The design offers an efficiency of 96% at 120W in the MOSFET stage, and a THD+N of 0.005% at 1kHz, 60W, 4ohm (both typical).
The IRS2092 is priced at US $2.70 each in 10,000-unit quantities.
Pricing for the MOSFETs range from US $0.65 to $1.25 each, all in 10,000-unit quantities.
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