New Class D audio power amplifier reference design for 25W to 500W scalable output power applications
International Rectifier has introduced the IRAUDAMP7 reference design for Class D audio amplifiers above 25W per channel including home theatre applications, musical instruments and car entertainment. With a power range from 25W to 500W, the IRAUDAMP7 offers a high degree of scalability on a single layer PCB.The IRAUDAMP7S two-channel, 120W half-bridge design provides 91 percent efficiency at 120W in Class D stage, eight ohms, and a THD+N of 0.005 percent at 1 kHz, 60W, eight ohms, (both typical). The IRAUDAMP7D features IR's IRS2092 protected digital audio driver IC in a DIP16 package together with through-hole components while the IRAUDAMP7S features the IRS2092S in an SOIC package with surface-mount components. Both reference designs are paired with the IRFI4019H-117P digital audio dual MOSFET to further enhance scalability, and are wave solder process compatible.
The IRAUDAMP7 provides designers with quick and easy scalability. For example, a 125W design can be functionally scaled to 60W within minutes simply by changing seven of the 50 components required on a single layer board.
The IRAUDAMP7 incorporates critical protection features including over-current protection, over-voltage protection, under-voltage protection, DC-protection, and over-temperature protection. Housekeeping functions include a +/- 5V supply for analog signal processing for the preamplifier and a +12V supply (Vcc) referenced to -B for the Class D gate driver stage.
Share this article with others
Post to del.icio.us
Printed from http://www.electronicsworld.co.uk/news/11651/New_Class_D_audio_power_amplifier_reference_design_for_25W_to_500W_scalable_output_power_applications.html
Comment on this article
Skip to comments
We encourage users to analyse, comment on and even challenge Electronics World's articles, including the one above - 'New Class D audio power amplifier reference design for 25W to 500W scalable output power applications'
User reviews and comments that include profanity or personal attacks or other inappropriate comments or material will be removed from the site.
Additionally, entries that are unsigned or contain "signatures" by someone other than the actual author will be removed. We will take steps to block users who violate any of our posting standards, terms of use or privacy policies or any other policies governing this site.