|
LM4852 Datasheet, PDF (1/21 Pages) National Semiconductor (TI) – Integrated Audio Amplifier System | |||
|
May 2004
LM4852
Integrated Audio Amplifier System
General Description
The LM4852 is an audio power amplifier system capable of
delivering 1.1W (typ) of continuous average power into a
mono 8⦠bridged-tied load (BTL) with 1% THD+N and
60mW (typ) per channel of continuous average power into
stereo 32⦠single-ended (SE) loads with 0.5% THD+N, us-
ing a 5V power supply.
The LM4852 features a 32 step digital volume control and
eight distinct output modes. The digital volume control and
output modes are programmed through a two-wire I2C com-
patible control interface, that allows flexibility in routing and
mixing audio channels. The LM4852 has 3 channels: one
pair for a two-channel stereo signal and the third for a
single-channel mono input.
The LM4852 is designed for cellular phone, PDA, and other
portable handheld applications. It delivers high quality output
power from a surface-mount package and requires only
seven external components.
The industry leading micro SMD package only utilizes 2mm
x 2.3mm of PCB space, making the LM4852 the most space
efficient audio sub system available today.
Key Specifications
n THD+N at 1kHz, 1.1W into 8⦠BTL
n THD+N at 1kHz, 60mW into 32⦠SE
n Single Supply Operation
1.0% (typ)
0.5% (typ)
2.6 to 5.0V
Features
n 1.1W (typ) output power with 8⦠mono BTL load
n 60mW (typ) output power with stereo 32⦠SE loads
n I2C programmable 32 step digital volume control
(-40.5dB to +6dB)
n Eight distinct output modes
n micro-SMD and LLP surface mount packaging
n "Click and Pop" suppression circuitry
n Thermal shutdown protection
n Low shutdown current (0.1uA, typ)
Applications
n Moblie Phones
n PDAs
Typical Application
FIGURE 1. Typical Audio Amplifier Application Circuit
20060632
Boomer® is a registered trademark of National Semiconductor Corporation.
© 2004 National Semiconductor Corporation DS200606
www.national.com
|
▷ |