LM4610 Dual Dc Operated Tone/volume/balance Circuit With National 3-d Sound - National Semiconductor

Description: The LM4844 is an integrated audio subsystem designed for stereo cell phone applications. Operating on a 3.3V supply, it combines a stereo speaker amplifier delivering 495mW per channel into an 8Ω load and a stereo OCL headphone amplifier delivering 33mW per channel into a 32Ω load. It integrates audio amplifiers, volume control, mixer, power management control, and National 3D enhancement all into a single package. In addition, the LM4844 routes and mixes the stereo and mono inputs into 10 distinct output modes. The LM4844 is controlled through an I2C compatible interface.

The LM4844 audio subsystem is engineered for efficient performance in mobile devices, particularly in stereo cell phone applications. The device is powered by a 3.3V supply, which is standard for many portable electronics, ensuring compatibility with a wide range of battery-operated devices. The stereo speaker amplifier is capable of delivering 495mW per channel into an 8Ω load, providing sufficient power for driving small speakers, while the stereo OCL (Output Capacitor-Less) headphone amplifier delivers 33mW per channel into a 32Ω load, suitable for high-quality audio output to headphones.

One of the key features of the LM4844 is its integration of various functionalities within a single package. This includes audio amplifiers, a volume control mixer, and power management control, which simplifies circuit design and reduces the number of external components required. The integration of National 3D enhancement technology allows for improved spatial audio effects, enhancing the listening experience for users.

The LM4844 is also versatile in its output capabilities, offering 10 distinct output modes that allow for the routing and mixing of stereo and mono inputs. This flexibility is particularly advantageous for applications where different audio sources may need to be combined or switched based on user preference or device requirements.

Control of the LM4844 is facilitated through an I2C compatible interface, enabling easy communication with microcontrollers or other digital devices. This interface allows for precise control over the audio subsystem, including volume adjustments and mode selection, making it a valuable component in modern audio applications. Overall, the LM4844 is a comprehensive solution for audio amplification in compact, portable devices.The LM4844 is an integrated Audio sub-system designed for stereo cell phone applications. Operating on a 3. 3V supply, it combines a stereo speaker Amplifier delivering 495mW per channel into an 8& load and a stereo OCL Headphone Amplifier delivering 33mW per channel into a 32& load. It integrates the Audio Amplifiers Volume Control mixer, Power Ma nagement control, and National 3D enhancement all into a single package. In addition, the LM4844 routes and mixes the stereo and mono inputs into 10 distinct output modes. The LM4844 is controlled through an I 2C compatible Interface