LM4871MX Computer IC Chip Amplifier IC 1-Channel (Mono) Class AB 8-SOIC

3W Audio Power Amplifier with Shutdown Mode 1

FEATURES DESCRIPTION The LM4871 is a mono bridged audio power amplifier 2• No Output Coupling Capacitors, Bootstrap capable of delivering 3W of continuous averageCapacitors, or Snubber Circuits Required power into a 3Ω load with less than 10% THD when • Unity-gain Stable powered by a 5V power supply (see Note). To • WSON, VSSOP, SOIC, or PDIP Packaging conserve power in portable applications, the LM4871's micropower shutdown mode (IQ = 0.6µA,• External Gain Configuration Capability typ) is activated when VDD is applied to the • Pin Compatible with the LM4861 SHUTDOWN pin. Boomer audio power amplifiers are designedAPPLICATIONS specifically to provide high power, high fidelity audio • Portable Computers output. They require few external components and • Desktop Computers operate on low supply voltages from 2.0V to 5.5V. Since the LM4871 does not require output coupling• Low Voltage Audio Systems capacitors, bootstrap capacitors, or snubber networks, it is ideally suited for low-power portableKEY SPECIFICATIONS systems that require minimum volume and weight. • PO at 10% THD+N, 1kHz Additional LM4871 features include thermal shutdown – LM4871LD: 3Ω , 4Ω Loads; 3W (typ), protection, unity-gain stability, and external gain set. 2.5 W (typ) Note: An LM4871LD that has been properly mounted – All other LM4871 Packages: 8Ω load to a circuit board will deliver 3W into 3Ω (at 10% 1.5 W (typ) THD). The other package options for the LM4871 will • Shutdown Current 0.6µA (typ) deliver 1.5W into 8Ω (at 10% THD). See the Application Information section for further information• Supply Voltage Range 2.0V to 5.5 V concerning the LM4871LD, LM4871MM, LM4871M, • THD at 1kHz at 1W Continuous Average and the LM4871N. Output Power into 8Ω 0.5% (max)

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