LM4889MA/NOPB National Semiconductor, LM4889MA/NOPB Datasheet

IC AMP AUDIO PWR 1W MONO 8SOIC

LM4889MA/NOPB

Manufacturer Part Number
LM4889MA/NOPB
Description
IC AMP AUDIO PWR 1W MONO 8SOIC
Manufacturer
National Semiconductor
Series
Boomer®r
Type
Class ABr
Datasheet
1.LM4889MMNOPB.pdf (20 pages)

Specifications of LM4889MA/NOPB

Output Type
1-Channel (Mono)
Max Output Power X Channels @ Load
1W x 1 @ 8 Ohm
Voltage - Supply
2.2 V ~ 5.5 V
Features
Depop, Shutdown, Thermal Protection
Mounting Type
Surface Mount
Package / Case
8-SOIC (3.9mm Width)
Amplifier Class
AB
No. Of Channels
1
Output Power
1W
Supply Voltage Range
2.2V To 5.5V
Load Impedance
8ohm
Operating Temperature Range
-40°C To +85°C
Amplifier Case Style
SOIC
Rohs Compliant
Yes
Lead Free Status / RoHS Status
Lead free / RoHS Compliant
Other names
*LM4889MA
*LM4889MA/NOPB
LM4889MA
LM4889MANOPB
LM4889MANOPB

Available stocks

Company
Part Number
Manufacturer
Quantity
Price
Company:
Bonase Electronics (HK) Co., Limited Bonase Electronics (HK) Co., Limited
Part Number:
LM4889MA/NOPB
Manufacturer:
National Semiconductor
Quantity:
1 977
© 2006 National Semiconductor Corporation
LM4889
1 Watt Audio Power Amplifier
General Description
The LM4889 is an audio power amplifier primarily designed
for demanding applications in mobile phones and other
portable communication device applications. It is capable of
delivering 1 watt of continuous average power to an 8Ω BTL
load with less than 2% distortion (THD+N) from a 5V
supply.
Boomer audio power amplifiers were designed specifically to
provide high quality output power with a minimal amount of
external components. The LM4889 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 LM4889 features a low-power consumption shutdown
mode, which is achieved by driving the shutdown pin with a
logic low. Additionally, the LM4889 features an internal ther-
mal shutdown protection mechanism.
The LM4889 contains advanced pop & click circuitry to elim-
inate noise which would otherwise occur during turn-on and
turn-off transitions.
The LM4889 is unity-gain stable and can be configured by
external gain-setting resistors.
Typical Application
Boomer® is a registered trademark of National Semiconductor Corporation.
 
FIGURE 1. Typical Audio Amplifier Application Circuit
200358
DC
power
Key Specifications
Features
■
■
■
■
■
■
■
■
Applications
■
■
■
■
■ 
■ 
■ 
Improved PSRR at 217Hz, 5 - 3.3V
Available in space-saving MSOP, SOIC, LLP, and micro
SMD packages
Ultra low current shutdown mode (3.3 to 2.6V - 0.01µA)
Can drive capacitive loads up to 500 pF
Improved pop & click circuitry eliminates noises during
turn-on and turn-off transitions
2.2 - 5.5V operation
No output coupling capacitors, snubber networks or
bootstrap capacitors required
Unity-gain stable
External gain configuration capability
Mobile Phones
PDAs
Portable electronic devices
Power Output at 5.0V & 2% THD
Power Output at 3.3V & 1% THD
Shutdown Current at 3.3 & 2.6V
20035801
November 2006
www.national.com
400mW(typ.)
0.01µA(typ.)
1.0W(typ.)
75dB

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LM4889MA/NOPB Summary of contents

Page 1

... The LM4889 is unity-gain stable and can be configured by external gain-setting resistors. Typical Application FIGURE 1. Typical Audio Amplifier Application Circuit Boomer® registered trademark of National Semiconductor Corporation. © 2006 National Semiconductor Corporation Key Specifications ■ Improved PSRR at 217Hz 3.3V ■  ...

Page 2

Connection Diagrams Small Outline (SO) Package Top View Order Number LM4889MA See NS Package Number M08A Mini Small Outline (MSOP) Package Top View Order Number LM4889MM See NS Package Number MUA08A 8 Bump micro SMD Top View Order Number LM4889ITL, ...

Page 3

... 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  θ ...

Page 4

Electrical Characteristics V Symbol Parameter I Quiescent Power Supply Current DD I Shutdown Current SD Output Power ( 8Ω Output Power ( 4Ω ) THD+N Total Harmonic Distortion+Noise PSRR Power Supply Rejection Ratio Note 1: All voltages ...

Page 5

Typical Performance Characteristics THD+N vs Frequency 5V, 8Ω and PWR = 250mW DD L THD+N vs Frequency 2.6V, 8Ω and PWR = 100mW DD L THD+N vs Power Out at ...

Page 6

THD+N vs Power Out 2.6V, 8Ω Power Supply Rejection Ratio (PSRR Input terminated with 10Ω R Power Supply Rejection Ratio (PSRR Input terminated with 10Ω R www.national.com , 1kHz L 20035843 ...

Page 7

Power Dissipation vs Output Power V = 3.3V DD 20035849 Output Power vs Load Resistance 20035874 Supply Current vs Shutdown Voltage 20035853 Power Dissipation vs Output Power Power Dissipation vs Output Power V = 2.6V DD ...

Page 8

Open Loop Frequency Response Noise Floor Power Derating Curves - 8 bump µSMD (P = 670mW) DMAX www.national.com 20035855   20035856   Power Derating Curves - 10 Pin LD pkg 20035833 8 Frequency Response vs Input Capacitor Size 20035854   ...

Page 9

Application Information BRIDGE CONFIGURATION EXPLANATION As shown in Figure 1, the LM4889 has two operational am- plifiers internally, allowing for a few different amplifier config- urations. The first amplifier's gain is externally configurable, while the second amplifier is internally fixed ...

Page 10

But in many cases the speakers used in portable sys- tems, whether internal or external, have little ability to reproduce signals below 100 Hz to 150 Hz. Thus, using a ...

Page 11

The LM4889 is unity-gain stable and requires no external components besides gain-setting resistors, an input coupling capacitor, and proper supply bypassing in the typical appli- cation. However closed-loop differential gain of greater than 10 is required, a feedback ...

Page 12

FIGURE 3. Differential Amplifier Configuration for LM4889 www.national.com 12 20035829 ...

Page 13

FIGURE 4. Reference Design Board and Layout - micro SMD 13 20035880 www.national.com ...

Page 14

LM4889 micro SMD DEMO BOARD ARTWORK Composite View Top Layer Inner Layer Ground www.national.com Silk Screen 20035886 Bottom Layer 20035882 Inner Layer V 20035885 14 20035881 20035883 DD 20035884 ...

Page 15

REFERENCE DESIGN BOARD AND PCB LAYOUT GUIDELINES - MSOP & SO BOARDS FIGURE 5. Reference Design Board 15 20035868 www.national.com ...

Page 16

LM4889 SO DEMO BOARD ARTWORK Silk Screen Top Layer Bottom Layer www.national.com LM4889 MSOP DEMO BOARD ARTWORK 20035876 20035863 20035864 16 Silk Screen 20035877 Top Layer 20035866 Bottom Layer 20035867 ...

Page 17

Physical Dimensions inches (millimeters) unless otherwise noted X1 = 1.514±0. 1.514±0. 0.600±0.075 8-Bump micro SMD Order Number LM4889ITL, LM4889ITLX NS Package Number TLA08AAA MSOP Order Number LM4889MM NS Package Number MUA08A 17 www.national.com ...

Page 18

LLP Order Number LM4889LD NS Package Number LDA10B SO Order Number LM4889MA NS Package Number M08A 18 ...

Page 19

Notes 19 www.national.com ...

Page 20

... National Semiconductor and the National Semiconductor logo are registered trademarks of National Semiconductor Corporation. All other brand or product names may be trademarks or registered trademarks of their respective holders. ...

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