LM4871是TI公司的一款扬声器放大器（AB类/D类）产品，LM4871是Boomer 系列：具有关断模式的 3W 音频放大器，本页介绍了LM4871的产品说明、应用、特性等，并给出了与LM4871相关的TI元器件型号供参考。
LM4871 - Boomer 系列：具有关断模式的 3W 音频放大器 - 扬声器放大器（AB类/D类） - 低功耗放大器 - TI公司（Texas Instruments，德州仪器）
The LM4871 is a mono bridged audio power amplifier capable of delivering 3W of continuous average power into a 3? load with less than 10% THD when powered by a 5V power supply (see Note). To conserve power in portable applications, the LM4871's micropower shutdown mode (IQ = 0.6µA, typ) is activated when VDD is applied to the SHUTDOWN pin.
Boomer audio power amplifiers are designed specifically to provide high power, high fidelity audio output. They require few external components and operate on low supply voltages from 2.0V to 5.5V. Since the LM4871 does not require output coupling capacitors, bootstrap capacitors, or snubber networks, it is ideally suited for low-power portable systems that require minimum volume and weight.
Additional LM4871 features include thermal shutdown protection, unity-gain stability, and external gain set.
Note: An LM4871LD that has been properly mounted to a circuit board will deliver 3W into 3? (at 10% THD). The other package options for the LM4871 will deliver 1.5W into 8? (at 10% THD). See the section for further information concerning the LM4871LD, LM4871MM, LM4871M, and the LM4871N.
- No Output Coupling Capacitors, Bootstrap Capacitors, or Snubber Circuits Required
- Unity-gain Stable
- WSON, VSSOP, SOIC, or PDIP Packaging
- External Gain Configuration Capability
- Pin Compatible with the LM4861
Key Specifications
- PO at 10% THD+N, 1kHz
- LM4871LD: 3? , 4? Loads; 3W (typ), 2.5 W (typ)
- All other LM4871 Packages: 8? load 1.5 W (typ)
- Shutdown Current 0.6µA (typ)
- Supply Voltage Range 2.0V to 5.5 V
- THD at 1kHz at 1W Continuous Average Output Power into 8? 0.5% (max)
