

LM4995是TI公司的一款扬声器放大器(AB类/D类)产品,LM4995是1.3W 音频功率放大器,本页介绍了LM4995的产品说明、应用、特性等,并给出了与LM4995相关的TI元器件型号供参考。
LM4995 - 1.3W 音频功率放大器 - 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 LM4995 is an audio power amplifier primarily designed for demanding applications in mobile phones and other portable communication device applications. It is capable of delivering 1.2W of continuous average power to an 8? BTL load with less than 1% 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 LM4995 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 LM4995 features a low-power consumption shutdown mode, which is achieved by driving the shutdown pin with logic low. Additionally, the LM4995 features an internal thermal shutdown protection mechanism.
The LM4995 contains advanced click and pop circuitry which eliminates noise which would otherwise occur during turn-on and turn-off transitions.
The LM4995 is unity-gain stable and can be configured by external gain-setting resistors.
- Available in Space-Saving 0.4mm Pitch DSBGA Package
- Ultra Low Current Shutdown Mode
- BTL Output Can Drive Capacitive Loads
- Improved Click and Pop Circuitry Eliminates Noise during Turn-On and Turn-Off Transitions
- 2.4 - 5.5V Operation
- No Output Coupling Capacitors, Snubber Networks or Bootstrap Capacitors Required
- Unity-Gain Stable
- External Gain Configuration Capability
- WSON Package: 0.5mm Pitch, 3 x 3 mm
Key Specifications
- PSRR at 3.6V (217Hz & 1kHz): 75 dB
- Output Power at 5.0V, 1% THD+N, 8?: 1.3 W (typ)
- Output Power at 3.6V, 1% THD+N, 8?: 625 mW (typ)
- Shutdown Current: 0.01µA (typ)

