Santa Clara, Calif.--June 24, 1997--National Semiconductor Corp. (Santa Clara, Calif.) announced availability of stereo audio amplifiers that deliver 11 W per channel into 4-ohm speakers and 7 W per channel into 8-ohm loads from a 24-V supply at 10 percent THD (total harmonic distortion).
The LM4752 and LM4755 give designers of mini-component systems and compact TVs the lowest cost per watt of any comparable part in the industry.
The key difference between the two devices is that the LM4755 includes a built-in mute feature, while muting the LM4752 requires a few external components.
Both parts are optimized for single-supply operation at the 20-V to 24-V range, with maximum headroom allowed under operational range from 9 V to 32 V. With gain internally set at 34dB, the number of external components required is reduced by as much as 50 percent. Both operate through the full temperature range of -20 degrees Celsiusto +85 degrees Celsius.
The LM4752 is now available in a 7-lead TO220 package. In quantities of 1,000, the LM4752T is priced at $1.90 each. The LM4755T is offered in a 9-lead TO220 package and is priced at $2.10 in 1,000s.
Santa Clara, CA
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