LM49270 Overview
Key Specifications
Mount Type: Surface Mount
Pins: 28
Height: 800 µm
Length: 5 mm
Description
The LM49270 is a fully integrated audio subsystem designed for stereo multimedia applications. The LM49270 combines a 2.2W stereo Class D amplifier with a 155mW stereo headphone amplifier, volume control, headphone sense, and National’s unique 3D sound enhancement into a single device.
Key Features
- The IC features a headphone sense input (HPS) that automatically detects the presence of a headphone and configures the device accordingly
- The LM49270 can automatically switch from OCL headphone output to a line driver output
- If the VOC pin is pulled to GND, the VOC amplifier is disabled and the VOC pin is internally set to GND
- This feature allows the LM49270 to be used as a line driver in OCL mode without a GND conflict on the headphone jack sleeve
- Additionally, the headphone amplifier can be configured as capacitively coupled (CC)
