The LM49150 is a fully integrated audio subsystem designed for portable handheld applications such as cellular phones. Part of National's Power Wise® product family, the LM49150 consumes very low power in the various modes of operation and still providing great audio performance. The LM49150 combines a 1.25W mono E 2S (Enhanced Emission Suppression) class D amplifier, 135mW Class AB earpiece amplifier, 42mW/channel stereo ground reference headphone amplifiers, volume control, and mixing circuitry into a single device.
The filterless class D amplifier delivers 1.25W into an 8Ω load with <1% THD+N with a 5V supply. The E 2S class D amplifier features a patented, ultra low EMI PWM architecture that significantly reduces RF emissions while preserving audio quality
| LM49150 | |
| Speaker Channels | Mono |
| Speaker Output Power/Ch (W) | 1.25 |
| Speaker PSRR (dB) | 91 |
| Ground Centered Headphone | Yes |
| Headphone Output Power/Ch (mW) | 42 |
| Headphone PSRR (dB) | 91 |
| Audio Mode Control | I2C |
| Supply Voltage (Min) (V) | 2.7 |
| Supply Voltage (Max) (V) | 5.5 |
