LM49120

具有 I2C 接口的 1.3W 立体声、模拟输入 AB 类音频放大器; • RF Immunity \n• Selectable OCL/SE Headphone Drivers\n• 32 Step Volume Control \n• Click and Pop Suppression\n• Independent Speaker and Headphone Gain Settings\n• Minimum External Components\n• Thermal Over Load Protection\n• Micro-power Shutdown\n• Space Saving 16–bump DSBGA Package\n• Thermal Shutdown Protection\n• Micro-power Shutdown\n• I2C Control Interface\n Key Specifications \n• Output Power at VDD = 5V: \n• Speaker: RL = 8Ω BTL, THD+N ≤ 1%: 1.3W (typ)\n• Headphone: RL = 32Ω, SE, THD+N ≤ 1%: 85mW (typ)\n \n• Output Power at VDD = 3.6V: \n• Speaker: RL = 8Ω, BTL, THD+N ≤ 1%: 632mW (typ)\n \n• Output Power at VDD = 3.3V: \n• Speaker: RL = 8Ω, BTL, THD+N ≤ 1%: 540mW (typ)\n• Headphone: RL = 32Ω, OCL/SE, THD+N ≤ 1%: 35mW (typ);

The LM49120 is a compact audio subsystem designed for portable handheld applications such as cellular phones. The LM49120 combines a mono 1.3W speaker amplifier, stereo 85mW/ch output capacitorless headphone amplifier, 32 step volume control, and an input mixer/multiplexer into a single 16–bump DSBGA package. The LM49120 has three input channels: two single-ended stereo inputs and a differential mono input. Each input features a 32-step digital volume control. The headphone output stage features an 8 step (-18dB – 0dB) attenuator, while the speaker output stage has two selectable (0dB/+6dB) gain settings. The digital volume control and mode control are programmed through a two-wire I2C compatible interface.

LM49120

Audio Sub-System with Mono Class AB Loudspeaker Amplifier and Stereo OCL/SE Headphone Amplifier

LM49120

Audio Sub-System with Mono Class AB Loudspeaker Amplifier and Stereo OCL/SE Headphone Amplifier

LM49120TL

Audio Sub-System with Mono Class AB Loudspeaker Amplifier and Stereo OCL/SE Headphone Amplifier

LM49120TL/NOPB

Audio Sub-System with Mono Class AB Loudspeaker Amplifier and Stereo OCL/SE Headphone Amplifier

LM49120TLEVAL

Audio Sub-System with Mono Class AB Loudspeaker Amplifier and Stereo OCL/SE Headphone Amplifier

LM49120TLSLASHNOPB

Audio Sub-System with Mono Class AB Loudspeaker Amplifier and Stereo OCL/SE Headphone Amplifier

LM49120TLX

Audio Sub-System with Mono Class AB Loudspeaker Amplifier and Stereo OCL/SE Headphone Amplifier

LM49120TLX/NOPB

Audio Sub-System with Mono Class AB Loudspeaker Amplifier and Stereo OCL/SE Headphone Amplifier

LM49120TLXSLASHNOPB

Audio Sub-System with Mono Class AB Loudspeaker Amplifier and Stereo OCL/SE Headphone Amplifier