Datasheet LM49270SQ - National Semiconductor SUBSYSTEM, STEREO CLASS D, LLP-28 — Datenblatt

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Manufacturer: National Semiconductor

Description: SUBSYSTEM, STEREO CLASS D, LLP-28

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LM49270 Filterless 2.2W Stereo Class D Audio Subsystem with OCL Headphone Amplifier, 3D Enhancement, and Headphone Sense
December 2006
LM49270 Filterless 2.2W Stereo Class D Audio Subsystem with OCL Headphone Amplifier, 3D Enhancement, and Headphone Sense
General 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. The LM49270 uses flexible I2C control interface for multiple application requirements. The filterless stereo class D amplifiers delivers 2.2W/channel into a 4 load with less than 10% THD+N with a 5V supply. The headphone amplifier features National's Output Capacitor-less (OCL) architecture that eliminates the output coupling capacitors required by traditional headphone amplifiers. The IC features a headphone sense input (HPS) that

Specifications:

• Amplifier Type: Headphone
• Base Number: 49270
• Input Offset Voltage Max: 10 mV
• Load Impedance Min: 4 Ohm
• Mounting Type: SMD
• Number of Amplifiers: 1
• Number of Channels: 4
• Number of Pins: 28
• Operating Temperature Range: -40°C to +85°C
• Output Power: 2.2 W
• Package / Case: LLP
• Power Rating RMS: 2.2 W
• SVHC: No SVHC (15-Dec-2010)
• Supply Voltage + Nom: 5.5 V
• Supply Voltage Range: 2.4 V to 5.5 V

RoHS: Yes