LM49150TL

• Ë 2 S-class amplifier
• Ground-referenced headphone output - eliminates output coupling capacitance
• I 2 C quantity and mode control
• Mono headphone amplifier
• Flexible outputs are speaker and headphone outputs
• 20-bump micro SMD package
• Soft-enabled function
• "Click" sound suppression circuit
• Thermal shutdown protection
• Low supply current
• Micropower shutdown

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LM49150 is an audio subsystem designed for portable handheld applications such as fully integrated cellular phones. The Power Wise ® product line in select countries still delivers superior audio performance with very low power consumption LM49150 various operating modes. LM49150 combined with a 1.25W single E 2 S (Enhanced Transmit Suppression) Class D amplifier, 135MW Class AB headphone amplifier, 42mW/channel stereo grounded reference headphone amplifier, volume control, and hybrid circuitry to a single device.

无滤波器D类放大器到 My E 2 The Class S-Class D amplifier features a patented PWM architecture with ultra-low electromagnetic interference that dramatically reduces RF emissions while maintaining audio quality. The 42mW/channel headphone driver uses National Semiconductor's grounding reference architecture to create an output from a single supply as a reference, eliminating bulky and expensive DC capacitors, saving space and reducing costs.

LM49150 has a fully differential mono input, and two single-ended stereo inputs. It is possible to mix and match these three inputs/multiplexing, whether it is a speaker or a headphone amplifier. Each input channel has an independent, 32-step digital volume control. The headphone output stage has an additional 8-step gain control, while the speaker output stage has a selectable 6dB or 12 dB gain. Mixer, volume control and device mode selection control, via I 2 C-compatible serial interface.

LM49150's superior click and pop suppression eliminates audible transient noise when power-up/down and off. LM49150 is in an ultra-compact 20-bump micro SMD package (2.225 mm x 2.644 mm).

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• mobile phone
• handheld computer
• Portable electronics