LM49153

LM49153 www.ti.com SNAS496C – JANUARY 2011 – REVISED MAY 2013 LM49153 Boomer™ Mono Audio Subsystem with Class G Headphone Amplifier, Class D Speaker Amplifier, Noise Gate and Speaker Protection Check for Samples: LM49153 FEATURES 1 23 Class G Ground Referenced Headphone Outputs High Efficiency Class D Amplifier with Spread Spectrum No Clip Speaker Protection Noise Gate I2C Volume and Mode Control Advanced Click-and-Pop Suppression Micro-Power Shutdown APPLICATIONS Feature Phones Smart Phones KEY SPECIFICATIONS Class G Headphone Amplifier, HPVDD = 1.8V, RL = 32Ω – IDDQHP, 1.2mA (Typ) – POUT, THD+N ≤ 1%, 25mW (Typ) – HP VOS, 0.5mV (Typ) Mono Class D Speaker Amplifier, RL = 8Ω, THD+N < 1% – POUT, LSVDD = 5.0V, 1.35W (Typ) – POUT, LSVDD = 3.6V, 680mW (Typ) – Efficiency 88% (Typ) DESCRIPTION The LM49153 is a fully integrated audio subsystem designed for portable handheld applications such as cellular phones. Part of Texas Instruments' PowerWise family of products, the LM49153 combines an earpiece switch, a high efficiency 25mW class G headphone amplifier, and a high efficiency 1.35W class D loudspeaker into a single device. The headphone amplifiers feature Texas Instruments' class G ground referenced architecture that creates a ground-referenced output with dynamic supply rails for optimum efficiency. The class D amplifier features an ALC (Automatic Level Control) with a noise gate that provides both no-clip and speaker protection. Mode selection, shutd...