描述 Description

The LM4853 is an audio power amplifier capable of delivering 1.5W (typ) of continuous average power into a mono 4? bridged-tied load (BTL) with 1% THD+N or 95mW per channel of continuous average power into stereo 32? single-ended (SE) loads with 1% THD+N, using a 5V power supply. The LM4853 can automatically switch between mono BTL and stereo SE modes utilizing a headphone sense pin. It is ideal for any system that provides both a monaural speaker output and a stereo line or headphone outputBoomer audio power amplifiers were designed specifically to provide high quality output power with a minimal amount of external components. Since the LM4853 does not require bootstrap capacitors or snubber networks, it is optimally suited for low-power portable systems.The LM4853 features an externally controlled, micropower consumption shutdown mode and thermal shutdown protection. The unity-gain stable LM4853's gain is set by external gain-setting resistors

特性 Features

? Mono 1.5W BTL or Stereo 300mW Output
? Headphone Sense
? “Click and Pop” Suppression Circuitry
? No Bootstrap Capacitors Required
? Thermal Shutdown Protection
? Unity-Gain Stable
? Available in Space-Saving VSSOP and WSON Packaging
Key Specifications
? Output Power at 1% THD+N, 1kHz:
? LM4853LD 3? BTL 1.9W (typ)
? LM4853LD 4? BTL 1.7W (typ)
? LM4853MM 4? BTL 1.5W (typ)
? LM4853MM,LD 8? BTL 1.1W (typ)
? LM4853MM,LD 8? SE 300mW (typ)
? LM4853MM,LD 32? SE 95mW (typ)

? THD+N at 1kHz, 95mW into 32? SE 1% (typ)
? Single Supply Operation 2.4 to 5.5V
? Shutdown Current 18μA (typ)