Texas Instruments LM49153
The LM49153 is a fully integrated audio subsystem designed for portable handheld applications such as cellular phones. 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.| Part No. | LM49153 |
|---|---|
| Datasheet | LM49153 Download |
| Manufacturer |  Texas Instruments |
| Description | Mono Audio Subsystem |
| Buy | Stock & Price |
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
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. Mode selection, shutdown control, and volume are controlled through an I2C compatible interface. Click and pop suppression eliminates audible transients on power-up/down and during shutdown.
