LM49151 Datasheet | National Semiconductor Corporation

LM49151 PRODUCT BRIEF LM49151 PRODUCT BRIEF .. PRELIMINARY March 26, 2009 Mono Class D Audio Subsystem with Earpiece Driver, Ground Referenced Headphone Amplifiers, Speaker Protection and No Clip with Clip Control General Description The LM49151 is a fully integrated audio subsystem designed for portable handheld applications such as cellular phones. The LM49151 bines a 1.25W mono E2S class D amplifier, 125m W Class AB earpiece driver, 42m W/channel stereo ground referenced headphone drivers, volume control, input mixer/multiplexer, and speaker protection into a single device. The LM49151 class D speaker amplifier Features National’s unique Automatic Level Control (ALC) that provides both a I2C programmable no-clip feature with Clip Controls and speaker protection. The E2S (Enhanced Emission Suppression) class D amplifier Features a patented, ultra low EMI PWM architecture that significantly reduces RF emissions while preserving audio quality and efficiency while delivering 1.25W into an 8Ω load with <1% THD+N with a 5V supply. The 42m W/channel headphone drivers feature National’s ground referenced architecture that creates a ground-referenced output from a single supply, eliminating the need for bulky and expensive DC-blocking capacitors, saving space and minimizing system cost. The LM49151 Features separate volume controls for the loudspeaker and headphone inputs. Mode selection, shutdown control, and volume are controlled through an I2C patible interface. The LM49151's superior click and pop suppression eliminates audible transients on power-up/down and during shutdown. Notice: This document is not a full datasheet. For more information regarding this product or to order samples please contact your local National Semiconductor sales office or visit http://.national./support/dir.html Key Specifications -  Output power at VDD = 3.3V   THD+N ≤ 1% LS Mode, RL = 8Ω HP Mode, RL = 32Ω 520m W (typ) 40m W (typ) -  Output power at VDD = 5V...