|
|
PDF LM49151 Data sheet ( Hoja de datos )
| Número de pieza | LM49151 | |
| Descripción | Mono Class D Audio Subsystem | |
| Fabricantes | National Semiconductor Corporation | |
| Logotipo |  |
|
Hay una vista previa y un enlace de descarga de LM49151 (archivo pdf) en la parte inferior de esta página. Total 4 Páginas | ||
|
No Preview Available !
LM49151
PRODUCT BRIEF
PRELIMINARY
March 26, 2009
Mono Class D Audio Subsystem with Earpiece Driver,
Groundwww.datasheet4u.com 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 combines a 1.25W mono E2S class D amplifier,
125mW Class AB earpiece driver, 42mW/channel stereo
ground referenced headphone drivers, volume control, input
mixer/multiplexer, and speaker protection into a single de-
vice.
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 Suppres-
sion) 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 42mW/channel headphone drivers feature National’s
ground referenced architecture that creates a ground-refer-
enced 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 loud-
speaker and headphone inputs. Mode selection, shutdown
control, and volume are controlled through an I2C compatible
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://www.national.com/support/dir.html
Key Specifications
■ Output power at VDD = 3.3V
THD+N ≤ 1%
LS Mode, RL = 8Ω
HP Mode, RL = 32Ω
■ Output power at VDD = 5V
THD+N ≤ 1%
LS Mode, RL = 8Ω
HP Mode, RL = 32Ω
■ Output Offset
LS Mode 15
HP Mode 15
520mW (typ)
40mW (typ)
1.25W (typ)
42mW (typ)
6mV (typ)
2mV (typ)
Features
■ E2S class D amplifier
■ Ground referenced outputs — eliminates output coupling
capacitors
■ I2C programmable No Clip Function with Clip Control
■ Voltage limiter speaker protection
■ I2C volume and mode Control
■ Ear Piece Amplifier
■ Advanced click-and-pop suppression
■ Low supply current
■ Micro-power shutdown
■ 20-bump micro SMD package
Applications
■ Mobile Phones
■ PDAs
■ Notebook PCs
■ Portable Electronics Devices
■ MP3 Players
Boomer® is a registered trademark of National Semiconductor Corporation.
© 2009 National Semiconductor Corporation 300925
www.national.com
1 page | ||
| Páginas | Total 4 Páginas | |
| PDF Descargar | [ Datasheet LM49151.PDF ] | |
Hoja de datos destacado
| Número de pieza | Descripción | Fabricantes |
| LM4915 | Pseudo-Differential Mono Headphone Amplifier with Fixed 6dB Gain |  National Semiconductor |
| LM4915 | LM4915 Pseudo-Differential Mono Headphone Amplifier with Fixed 6dB Gain (Rev. A) |  Texas Instruments |
| LM49150 | Mono Class D Audio Subsystem w/ Earpiece Driver Stereo Gnd Ref Headphone Amps (Rev. C) | Texas Instruments |
| LM49150 | Mono Class D Audio Subsystem | National Semiconductor |
| Número de pieza | Descripción | Fabricantes |
| SLA6805M | High Voltage 3 phase Motor Driver IC. |
 Sanken |
| SDC1742 | 12- and 14-Bit Hybrid Synchro / Resolver-to-Digital Converters. |
 Analog Devices |
|
DataSheet.es es una pagina web que funciona como un repositorio de manuales o hoja de datos de muchos de los productos más populares, |
| DataSheet.es | 2020 | Privacy Policy | Contacto | Buscar |