LM49151TLX/NOPB National Semiconductor, LM49151TLX/NOPB Datasheet
LM49151TLX/NOPB
Manufacturer Part Number
LM49151TLX/NOPB
Description
IC AMP AUDIO PWR 1.25W D 20USMD
Manufacturer
National Semiconductor
Series
Boomer®, PowerWise®r
Type
Class Dr
Datasheet
1.LM49151TLNOPB.pdf
(4 pages)
Specifications of LM49151TLX/NOPB
Output Type
1-Channel (Mono) with Stereo Headphones
Max Output Power X Channels @ Load
1.25W x 1 @ 8 Ohm; 42mW x 2 @ 32 Ohm
Features
Depop, Differential Inputs, E²S, I²C, Shutdown, Volume Control
Mounting Type
Surface Mount
Package / Case
20-MicroSMD
Lead Free Status / RoHS Status
Lead free / RoHS Compliant
Voltage - Supply
-
Other names
LM49151TLX
© 2010 National Semiconductor Corporation
Mono Class D Audio Subsystem with Earpiece Driver,
Ground 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 E
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
I
speaker protection. The E
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 I
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
Boomer® is a registered trademark of National Semiconductor Corporation.
2
C programmable no-clip feature with Clip Controls and
2
S (Enhanced Emission Suppres-
2
300925
S class D amplifier,
2
C compatible
PRODUCT BRIEF
LM49151
Key Specifications
Features
■
■
■
■
■
■
■
■
■
■
Applications
■
■
■
■
■
■
■
■
E
Ground referenced outputs — eliminates output coupling
capacitors
I
Voltage limiter speaker protection
I
Ear Piece Amplifier
Advanced click-and-pop suppression
Low supply current
Micro-power shutdown
20-bump micro SMD package
Mobile Phones
PDAs
Notebook PCs
Portable Electronics Devices
MP3 Players
THD+N
THD+N
LS Mode 15
HP Mode 15
Output power at V
Output power at V
Output Offset
2
2
2
C programmable No Clip Function with Clip Control
C volume and mode Control
LS Mode, R
HP Mode, R
LS Mode, R
HP Mode, R
S class D amplifier
≤
≤
1%
1%
L
L
L
L
= 8Ω
= 8Ω
= 32Ω
= 32Ω
DD
DD
= 3.3V
= 5V
www.national.com
520mW (typ)
May 14, 2010
40mW (typ)
1.25W (typ)
42mW (typ)
6mV (typ)
2mV (typ)
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LM49151TLX/NOPB Summary of contents
Page 1
... 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 Boomer® registered trademark of National Semiconductor Corporation. © 2010 National Semiconductor Corporation LM49151 PRODUCT BRIEF Key Specifications ■ ...
Page 2
Typical Application www.national.com FIGURE 1. Typical Audio Amplifier Application Circuit 2 30092576 ...
Page 3
Connection Diagrams 20 Bump micro SMD Package Top View Order Number LM49151TL (See NS Package Number TLA20GDA) Ordering Information Order Number Package LM49151TL 20 Bump micro SMD LM49151TLX 20 Bump micro SMD Bump Descriptions Bump Name ...
Page 4
... For more National Semiconductor product information and proven design tools, visit the following Web sites at: www.national.com Products Amplifiers www.national.com/amplifiers Audio www.national.com/audio Clock and Timing www.national.com/timing Data Converters www.national.com/adc Interface www.national.com/interface LVDS www.national.com/lvds Power Management www.national.com/power Switching Regulators www.national.com/switchers LDOs www.national.com/ldo LED Lighting www ...