Datasheet LM4670SD - National Semiconductor AMP, AUDIO MONO CLASS D, SMD, LLP-8 — Datenblatt

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Manufacturer: National Semiconductor

Description: AMP, AUDIO MONO CLASS D, SMD, LLP-8

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Docket:
LM4670 Filterless High Efficiency 3W Switching Audio Amplifier
July 2006
LM4670 Filterless High Efficiency 3W Switching Audio Amplifier
General Description
The LM4670 is a fully integrated single-supply high efficiency switching audio amplifier.

It features an innovative modulator that eliminates the LC output filter used with typical switching amplifiers. Eliminating the output filter reduces external component count, simplifies circuit design, and reduces board area. The LM4670 processes analog inputs with a deltasigma modulation technique that lowers output noise and THD when compared to conventional pulse width modulators. The LM4670 is designed to meet the demands of mobile phones and other portable communication devices. Operating on a single 5V supply, it is capable of driving a 4 speaker load at a continuous average output of 2.3W with less than 1% THD+N. Its flexible power supply requirements allow operation from 2.4V to 5.5V. The LM4670 has high efficiency with speaker load

Specifications:

• Amplifier Class: AB
• Amplifier Type: Audio
• Base Number: 4670
• Load Impedance Min: 4 Ohm
• Load Impedance: 4 Ohm
• Mounting Type: SMD
• Number of Amplifiers: 1
• Number of Channels: 1
• Number of Pins: 8
• Operating Temperature Range: -40°C to +85°C
• Output Power Pout: 3 W @ 4 Ohm
• Output Power: 3 W
• Package / Case: LLP
• Power Rating RMS: 3 W
• SVHC: No SVHC (19-Dec-2011)
• Supply Voltage + Nom: 6 V
• Supply Voltage Range: 2.4 V to 5.5 V
• THD + N: 0.35% @ 1 W, VDD=5V

RoHS: Yes