The LM4946 is an audio power amplifier capable of delivering 540mW of continuous average power into a mono 8Ω bridged-tied load (BTL) with 1% THD+N, 35mW per channel of continuous average power into stereo 32Ω single-ended (SE) loads with 1% THD+N, or an output capacitor-less (OCL) configuration with identical specifications as the SE configuration, from a 3.3V power supply.
The LM4946 has three input channels: one pair for a two-channel stereo signal and the third for a differential single-channel mono input. The LM4946 features a 32-step digital volume control and eight distinct output modes. The digital volume control, 3D enhancement, and output modes (mono/SE/OCL) are programmed through a two-wire I 2C or a three-wire SPI compatible interface that allows flexibility in routing and mixing audio channels
| LM4946 | |
| Speaker Channels | Stereo |
| Speaker Output Power/Ch (W) | 1.3 |
| Speaker PSRR (dB) | 76 |
| Headphone Output Power/Ch (mW) | 85 |
| Headphone PSRR (dB) | 84 |
| Audio Mode Control | I2C, SPI |
| Supply Voltage (Min) (V) | 2.7 |
| Supply Voltage (Max) (V) | 5.5 |
