Datasheet LM4938MH - National Semiconductor AMP, STEREO, 1 W, SMD, 4938, TSSOP28 — Ficha de datos

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Manufacturer: National Semiconductor

Description: AMP, STEREO, 1 W, SMD, 4938, TSSOP28

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LM4938 Stereo 2W Audio Power Amplifiers with DC Volume Control and Selectable Gain
July 2005
LM4938 Stereo 2W Audio Power Amplifiers with DC Volume Control and Selectable Gain
General Description
The LM4938 is a monolithic integrated circuit that provides DC volume control, and stereo bridged audio power amplifiers capable of producing 2W into 4 (Note 1) with less than 1.0% THD or 2.2W into 3 (Note 2) with less than 1.0% THD.

Boomer ® audio integrated circuits were designed specifically to provide high quality audio while requiring a minimum amount of external components. The LM4938 incorporates a DC volume control, stereo bridged audio power amplifiers and a selectable gain or bass boost, making it optimally suited for multimedia monitors, portable radios, desktop, and portable computer applications. The LM4938 features an externally controlled, low-power consumption shutdown mode, and both a power amplifier and headphone mute for maximum system flexibility and performance.

Specifications:

• Amplifier Case Style: TSSOP
• Amplifier Type: Power
• Bandwidth: 20 kHz
• Base Number: 4938
• IC Generic Number: 4938
• Input Offset Voltage Max: 50mV
• Load Impedance Min: 3 Ohm
• Load Impedance: 3 Ohm
• Logic Function Number: 4938
• Mounting Type: SMD
• Number of Amplifiers: 2
• Number of Channels: 2
• Number of Pins: 28
• Operating Temperature Range: -20°C to +85°C
• Output Power Pout: 1.3 W @ 8 Ohm
• Package / Case: TSSOP
• Power Rating RMS: 2.2 W
• SVHC: No SVHC (15-Dec-2010)
• Supply Voltage + Nom: 6 V
• Supply Voltage Range: 2.7 V to 5.5 V
• THD + N: 0.05% @ 400 mW, 8 Ohm, VDD=5V

RoHS: Yes