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National intros new Boomer class D audio amp

Posted: 08 Feb 2007 ?? ?Print Version ?Bookmark and Share

Keywords:class D? audio amplifier? GPS? National? Boomer?

LM48510 class D audio amp from National

National Semiconductor Corp. has introduced the first product in its new line of Boomer class D audio amplifiers with integrated converter technology that eliminates the need for an external boost converter. The LM48510 enables manufacturers to design portable products that are able to operate at constant high-level output power even as batteries deplete to lower voltages.

Power boost
The new audio amplifier provides the boosted power needed by portable products when operating on low battery voltages. The amplifier's small footprint makes it suited for portable GPS, wireless handsets, portable media players, medical equipment, voice-prompted fire alarms and a broad range of other battery-powered applications. In addition to its small footprint, the new audio amplifier uses minimal external components, which saves significant board space compared to multichip solutions.

The LM48510 is capable of creating 1.2W of continuous power to an 8-ohm speaker from a 3V input voltage. The amplifier drives a 4-ohm speaker load at a continuous output power of 1.7W with less than 1 percent THD+N.

Pop-and-click circuitry
The Boomer amplifier features a low-power consumption shutdown mode as well as output short-circuit and thermal overload protection. Advanced pop-and-click circuitry eliminates output transients that would otherwise occur during power or shutdown cycles. The LM48510 is externally configurable for independent gain control from multiple sources.

Available today in a 0.5mm-pitch, 16-pin LLP package, the LM48510 is priced at $1.35 in 1,000-unit quantities.

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