The LM49151 is a fully integrated audio subsystem designed for portable handheld applications such as cellular phones. The LM49151 combines a 1.25W mono E 2S class D amplifier, 125mW Class AB earpiece driver, 42mW/channel stereo ground referenced headphone drivers, volume control, input mixer/multiplexer, and speaker protection into a single device.
The LM49151 class D speaker amplifier features National’s unique Automatic Level Control (ALC) that provides both a I 2C programmable no-clip feature with Clip Controls and speaker protection. The E 2S (Enhanced Emission Suppression) class D amplifier features a patented, ultra low EMI PWM architecture that significantly reduces RF emissions while preserving audio quality and efficiency while delivering 1
| LM49151 | |
| 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 |
