LM49270
LM49270 is Filterless 2.2W Stereo Class D Audio Subsystem manufactured by Texas Instruments.
FEATURES
- 2 Stereo Filterless Class D Amplifier
- Selectable OCL/CC Headphone Amplifier
- Headphone Sense Ability
- TI’s 3D Enhancement
- RF Suppression
- I2C Control Interface
- 32-Step Digital Volume Control
- 6 Operating Modes
- Output Short Circuit Protection and Thermal
Shutdown Protection
- Minimum External ponents
- Click and Pop Suppression
- Micro-Power Shutdown
- Independent Speaker and Headphone Volume
Controls
- Available in Space-Saving 28 Pin WQFN
Package
APPLICATIONS
- Portable DVD Players
- Smart Phones
- PDAs
- Laptops
KEY SPECIFICATIONS
- Stereo Class D Amplifier Efficiency:
- VDD = 3.3V, 450m W/Ch into 8Ω 84%
- VDD = 5V, 1W/Ch into 8Ω 84%
- Quiescent Power Supply Current, VDD = 3.3V
- Speaker Mode 5.5 m A
- Headphone Mode (OCL) 4 m A
- Power Output/Channel, VDD = 5V
- Class D Speaker Amplifier:
- RL = 4Ω, THD+N = ≤ 10% 2.3 W
- RL = 8Ω, THD+N = ≤ 1% 106 W
- Headphone Amplifier:
- RL = 16Ω, THD+N = ≤ 1% 155 m W
- RL = 32Ω, THD+N = ≤ 1% 90 m W
- Shutdown Current 0.02μA
DESCRIPTION...
