The latest member of the PowerWise portfolio, the LM48511 debuts as the industry’s first single-chip, 3W mono Class D audio amplifier with spread spectrum technology and an integrated boost converter. The spread spectrum technology lowers EMI
The latest member of the PowerWise portfolio, the LM48511 debuts as the industry’s first single-chip, 3W mono Class D audio amplifier with spread spectrum technology and an integrated boost converter. The spread spectrum technology lowers EMI emissions by more than 11 dB below the FCC limit. Driving an 8-Ω load at 3W continuous, the device specifies an efficiency of 80% at 5V, and independent regulator- and amplifier-shutdown controls optimize power savings by disabling the regulator when high output power is not required. Gain is set via external resistors. Other features include less than 1% THD+N, output short-circuit and thermal overload protection, and pop-and-click circuitry. Available in a 24-pin LLP, price is $1.75 each/1,000. NATIONAL SEMICONDUCTOR CORP., Santa Clara, CA. (800) 272-9959.
