LM4889 - 1 瓦音频功率放大器

LM4889是TI德州仪器公司的一款扬声器放大器（AB类/D类）产品，LM4889是1 瓦音频功率放大器，本站介绍了LM4889的封装应用图解、特点和优点、功能等，并给出了与LM4889相关的TI元器件型号供参考。

LM4889 - 1 瓦音频功率放大器 - 扬声器放大器（AB类/D类） - 低功耗放大器 - 德州仪器

产品描述

The LM4889 is an audio power amplifier primarily designed for demanding applications in mobile phones and other portable communication device applications. It is capable of delivering 1 watt of continuous average power to an 8? BTL load with less than 2% distortion (THD+N) from a 5VDC power supply.

Boomer audio power amplifiers were designed specifically to provide high quality output power with a minimal amount of external components. The LM4889 does not require output coupling capacitors or bootstrap capacitors, and therefore is ideally suited for mobile phone and other low voltage applications where minimal power consumption is a primary requirement.

The LM4889 features a low-power consumption shutdown mode, which is achieved by driving the shutdown pin with a logic low. Additionally, the LM4889 features an internal thermal shutdown protection mechanism.

The LM4889 contains advanced pop & click circuitry to eliminate noise which would otherwise occur during turn-on and turn-off transitions.

The LM4889 is unity-gain stable and can be configured by external gain-setting resistors.

产品特性

Available in Space-Saving VSSOP, SOIC, WSON, and DSBGA Packages
Ultra Low Current Shutdown Mode (3.3 to 2.6V - 0.01µA)
Can Drive Capacitive Loads up to 500 pF
Improved Pop & Click Circuitry Eliminates Noises During Turn-On and Turn-Off Transitions
2.2 - 5.5V Operation
No Output Coupling Capacitors, Snubber Networks or Bootstrap Capacitors Required
Unity-Gain Stable
External Gain Configuration Capability

Key Specifications

Improved PSRR at 217Hz, 5 - 3.3V 75dB
Power Output at 5.0V & 2% THD 1.0W(typ.)
Power Output at 3.3V & 1% THD 400mW(typ.)
Shutdown Current at 3.3 & 2.6V 0.01µA(typ.)

All trademarks are the property of their respective owners. Boomer is a trademark of Texas Instruments.

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