LM4928TLX/NOPB National Semiconductor, LM4928TLX/NOPB Datasheet

IC AMP AUDIO PWR 2.2W AB 16USMD

LM4928TLX/NOPB

Manufacturer Part Number
LM4928TLX/NOPB
Description
IC AMP AUDIO PWR 2.2W AB 16USMD
Manufacturer
National Semiconductor
Series
Boomer®r
Type
Class ABr
Datasheet

Specifications of LM4928TLX/NOPB

Output Type
2-Channel (Stereo)
Max Output Power X Channels @ Load
2.2W x 2 @ 4 Ohm
Voltage - Supply
2.4 V ~ 5.5 V
Features
Depop, Differential Inputs, Shutdown, Thermal Protection
Mounting Type
Surface Mount
Package / Case
16-MicroSMD
Operational Class
Class-AB
Audio Amplifier Output Configuration
2-Channel Stereo
Output Power (typ)
1.5x2@8OhmW
Audio Amplifier Function
Speaker
Total Harmonic Distortion
0.04@8Ohm@1W%
Single Supply Voltage (typ)
3/5V
Dual Supply Voltage (typ)
Not RequiredV
Power Supply Requirement
Single
Rail/rail I/o Type
No
Power Supply Rejection Ratio
90dB
Single Supply Voltage (min)
2.4V
Single Supply Voltage (max)
5.5V
Dual Supply Voltage (min)
Not RequiredV
Dual Supply Voltage (max)
Not RequiredV
Operating Temp Range
-40C to 85C
Operating Temperature Classification
Industrial
Mounting
Surface Mount
Pin Count
16
Package Type
uSMD
For Use With
LM4928TLBD - BOARD EVALUATION LM4928TL
Lead Free Status / RoHS Status
Lead free / RoHS Compliant
Other names
LM4928TLX
© 2006 National Semiconductor Corporation
LM4928
1.2 Watt Stereo Fully Differential Audio Amplifier with RF
Suppression and Shutdown Low
General Description
The LM4928 is an stereo fully differential stereo audio power
amplifier primarily designed for demanding applications in
mobile phones and other portable communication devices. It
is capable of delivering 1.2 watts of continuous average
power to a 8Ω load with less than 1% distortion (THD+N)
from a 5V
Boomer audio power amplifiers were designed specifically to
provide high quality output power with a minimal amount of
external components. The LM4928 does not require output
coupling capacitors or bootstrap capacitors, and therefore is
ideally suited for mobile phone and other low voltage appli-
cations where minimal power consumption is a primary re-
quirement.
The LM4928 features a low-power consumption shutdown
mode. To facilitate this, shutdown may be enabled by logic
low. Additionally, the LM4928 features an internal thermal
shutdown protection mechanism.
The LM4928 contains advanced pop & click circuitry which
eliminates noises which would otherwise occur during
turn-on and turn-off transitions.
Boomer
®
is a registered trademark of National Semiconductor Corporation.
DC
power supply.
DS201600
Key Specifications
Features
n RF Suppression Circuitry
n Fully differential amplification
n Available in space-saving micro SMD and LLP packages
n Ultra low current shutdown mode
n Can drive capacitive loads up to 100pF
n Improved pop & click circuitry eliminates noises during
n 2.4 - 5.5V operation
n No output coupling capacitors, snubber networks or
Applications
n Mobile phones
n PDAs
n Portable electronic devices and accessories
j
j
j
j
turn-on and turn-off transitions
bootstrap capacitors required
Improved PSRR at 217Hz
Output Power at 5.0V
Output Power at 3.0V
Shutdown Current
@
@
1% THD+N (8Ω)
1% THD+N (8Ω)400mW (typ)
February 2006
www.national.com
0.1µA (typ)
90dB (typ)
1.2W (typ)

Related parts for LM4928TLX/NOPB

LM4928TLX/NOPB Summary of contents

Page 1

... The LM4928 contains advanced pop & click circuitry which eliminates noises which would otherwise occur during turn-on and turn-off transitions. Boomer ® registered trademark of National Semiconductor Corporation. © 2006 National Semiconductor Corporation Key Specifications j Improved PSRR at 217Hz j Output Power at 5.0V j Output Power at 3 ...

Page 2

Typical Application FIGURE 1. Typical Audio Amplifier Application Circuit www.national.com 2 201600B7 ...

Page 3

Connection Diagrams LLP Package Top View Order Number LM4928SD See NS Package Number SDA14A micro SMD Package Top View Order Number LM4928TL See NS Package Number TLA16 ...

Page 4

... Absolute Maximum Ratings If Military/Aerospace specified devices are required, please contact the National Semiconductor Sales Office/ Distributors for availability and specifications. Supply Voltage Storage Temperature Input Voltage Power Dissipation (Note 3) ESD Susceptibility (Note 4) ESD Susceptibility (Note 5) Junction Temperature Thermal Resistance Electrical Characteristics V ...

Page 5

Electrical Characteristics V The following specifications apply for V 25˚C. (Continued) Symbol Parameter P Output Power o THD+N Total Harmonic Distortion + Noise PSRR Power Supply Rejection Ratio CMRR Common-Mode Rejection Ratio V Output Offset OS V Shutdown Voltage Input ...

Page 6

Typical Performance Characteristics THD+N vs Frequency V = 2.6V 4Ω THD+N vs Frequency 4Ω THD+N vs Frequency 4Ω www.national.com ...

Page 7

Typical Performance Characteristics THD+N vs Output Power V = 2.6V 4Ω THD+N vs Output Power 4Ω THD+N vs Output Power 4Ω (Note ...

Page 8

Typical Performance Characteristics PSRR vs Common Mode Voltage 8Ω 217Hz DD L PSRR vs Frequency 8Ω Input Terminated to GND 500kHz Output Power vs ...

Page 9

Typical Performance Characteristics CMRR vs Frequency 8Ω Crosstalk vs Frequency 8Ω Top = Vin Left driven, Vout Right measured Bot = Vin Right driven, ...

Page 10

Typical Performance Characteristics Power Dissipation vs Output Power Noise Floor Output Power vs Load Resistance www.national.com (Note 10) (Continued) Power Dissipation vs Output Power 201600C6 201600C2 Clipping Voltage vs Supply Voltage 201600C4 ...

Page 11

Typical Performance Characteristics Power Derating Curve (SD Package 1kHz 8Ω Power Derating Curve (TL Package 1kHz 8Ω (Note 10) (Continued) Power Derating Curve (SD Package 20160068 ...

Page 12

... Demonstration Board Layout section. Further detailed and specific information concerning PCB layout, fabrication, and mounting an LLP package is available from National Semiconductor’s package Engineering Group un- der application note AN1187. PCB LAYOUT AND SUPPLY REGULATION CONSIDERATIONS FOR DRIVING 4Ω LOADS Power dissipated by a load is a function of the voltage swing across the load and the load’ ...

Page 13

Application Information (2π Single-Ended DMAX DD L However, a direct consequence of the increased power de- livered to the load by a bridge amplifier is an increase in internal power dissipation ...

Page 14

Application Information Special care must be taken to match the values of the input resistors (R and R ) and (R and Because of the balanced nature of differential amplifiers, resistor matching differences can result in ...

Page 15

LM4928 Demo Board Schematic 15 20160073 www.national.com ...

Page 16

LM4928 LLP Demo Board Artwork Top Silkscreen Bottom Layer and Ground Plane www.national.com 20160009 20160007 16 Top Layer 20160008 ...

Page 17

LM4928 microSMD Board Artwork Top Silkscreen Middle Layer 20160013 Bottom Layer and Ground Plane 20160010 17 Top Layer 20160012 20160011 www.national.com ...

Page 18

Revision History Rev 1.0 1.1 1.2 1.3 1.4 1.5 1.6 1.7 1.8 1.9 2.0 2.1 2.2 www.national.com Date 7/13/05 Input first set of edits. 10/3/05 More edits input. 10/10/05 Input few text edits. 10/25/04 Added the Typ Perf section. 11/02/05 ...

Page 19

Physical Dimensions inches (millimeters) unless otherwise noted X1 = 1.970 LLP Package Order Number LM4928SD NS Package Number SDA14A 16–bump micro SMD Order Number LM4928TL NS Package Number TLA1611A ± ± 0.03 1.970 0.03 0.600 19 ...

Page 20

... BANNED SUBSTANCE COMPLIANCE National Semiconductor manufactures products and uses packing materials that meet the provisions of the Customer Products Stewardship Specification (CSP-9-111C2) and the Banned Substances and Materials of Interest Specification (CSP-9-111S2) and contain no ‘‘Banned Substances’’ as defined in CSP-9-111S2. ...

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