FEATURES DESCRIPTION

The LM4871 is a mono bridged audio power amplifier 2• No Output Coupling Capacitors, Bootstrap

capable of delivering 3W of continuous average Capacitors, 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.

APPLICATIONS Boomer audio power amplifiers are designed

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 portable KEY 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)

Connection Diagrams

Figure 1. VSSOP, Small Outline, and PDIP Figure 2. WSON Package (Top View)

Package See Package Number NGN0008A

Top View

See Package Number DGK0008A, D0008A, or

D0008E

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