LM4862MX National Semiconductor, LM4862MX Datasheet

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LM4862MX

Manufacturer Part Number
LM4862MX
Description
IC AMP AUDIO PWR .825W AB 8SOIC
Manufacturer
National Semiconductor
Series
Boomer®r
Type
Class ABr
Datasheet

Specifications of LM4862MX

Output Type
1-Channel (Mono)
Max Output Power X Channels @ Load
825mW x 1 @ 8 Ohm
Voltage - Supply
2.7 V ~ 5.5 V
Features
Shutdown, Thermal Protection
Mounting Type
Surface Mount
Package / Case
8-SOIC (3.9mm Width)
Operational Class
Class-AB
Audio Amplifier Output Configuration
1-Channel Mono
Output Power (typ)
0.825x1@8OhmW
Audio Amplifier Function
Speaker
Total Harmonic Distortion
0.55@8Ohm@500mW%
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
50dB
Single Supply Voltage (min)
2.7V
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
8
Package Type
SOIC N
Lead Free Status / RoHS Status
Contains lead / RoHS non-compliant
Other names
*LM4862MX

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© 2004 National Semiconductor Corporation
LM4862
675 mW Audio Power Amplifier with Shutdown Mode
General Description
The LM4862 is a bridge-connected audio power amplifier
capable of delivering typically 675mW of continuous average
power to an 8Ω load with 1% THD+N from a 5V power
supply.
Boomer audio power amplifiers were designed specifically to
provide high quality output power with a minimal amount of
external components. Since the LM4862 does not require
output coupling capacitors, bootstrap capacitors, or snubber
networks, it is optimally suited for low-power portable sys-
tems.
The LM4862 features an externally controlled, low-power
consumption shutdown mode, as well as an internal thermal
shutdown protection mechanism.
The unity-gain stable LM4862 can be configured by external
gain-setting resistors.
Key Specifications
n THD+N for 500mW continuous average
Typical Application
*Refer to the Application Information section for information
concerning proper selection of the input coupling capacitor.
Boomer
FIGURE 1. Typical Audio Amplifier Application Circuit
output power at 1kHz into 8Ω
®
is a registered trademark of National Semiconductor Corporation.
DS012342
1% (max)
01234201
n Output power at 10% THD+N at 1kHz
n Shutdown Current
Features
n No output coupling capacitors, bootstrap capacitors or
n Small Outline or DIP packaging
n Unity-gain stable
n External gain configuration capability
n Pin compatible with LM4861
Applications
n Portable computers
n Cellular phones
n Toys and games
Connection Diagram
8Ω
snubber circuits are necessary
See NS Package Number M08A or N08E
Order Number LM4862M, LM4862N
Small Outline and DIP Package
Top View
01234202
September 2004
www.national.com
825mW (typ)
0.7µA (typ)
into

Related parts for LM4862MX

LM4862MX Summary of contents

Page 1

... Application Information section for information concerning proper selection of the input coupling capacitor. FIGURE 1. Typical Audio Amplifier Application Circuit Boomer ® registered trademark of National Semiconductor Corporation. © 2004 National Semiconductor Corporation n Output power at 10% THD+N at 1kHz 8Ω n Shutdown Current Features ...

Page 2

... 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 Soldering Information Small Outline Package Vapor Phase (60 sec ...

Page 3

Automatic Switching Circuit External Components Description (Figure 1) Components 1. R Inverting input resistance which sets the closed-loop gain in conjunction with R i high pass filter with Input coupling capacitor which blocks the DC voltage at ...

Page 4

Typical Performance Characteristics THD+N vs Frequency THD+N vs Frequency THD+N vs Output Power www.national.com 01234203 THD+N vs Output Power 01234205 THD+N vs Output Power 01234207 4 THD+N vs Frequency 01234204 01234206 01234208 ...

Page 5

Typical Performance Characteristics Output Power vs Supply Voltage Output Power vs Supply Voltage Power Dissipation vs Output Power (Continued) 01234209 01234211 01234213 5 Output Power vs Supply Voltage 01234210 Output Power vs Load Resistance 01234212 Power Derating Curve 01234214 www.national.com ...

Page 6

Typical Performance Characteristics Dropout Voltage vs Power Supply Frequency Response vs Input Capacitor Size Open Loop Frequency Response www.national.com (Continued) 01234215 01234217 01234219 6 Noise Floor 01234216 Power Supply Rejection Ratio 01234218 Supply Current vs Supply Voltage 01234220 ...

Page 7

Application Information BRIDGE CONFIGURATION EXPLANATION As shown in Figure 1, the LM4862 has two operational amplifiers internally, allowing for a few different amplifier configurations. The first amplifier’s gain is externally config- urable, while the second amplifier is internally fixed in ...

Page 8

Application Information AUTOMATIC SWITCHING CIRCUIT As shown in Figure 2, the LM4862 and the LM4880 can be set up to automatically switch on and off depending on whether headphones are plugged in. The LM4880 is used to drive a stereo ...

Page 9

Application Information Once the power dissipation equations have been addressed, the required differential gain can be determined from Equa- tion From Equation 4, the minimum use A VD ...

Page 10

Physical Dimensions unless otherwise noted 8-Lead (0.150" Wide) Molded Small Outline Package, JEDEC www.national.com inches (millimeters) Order Number LM4862M NS Package Number M08A 10 ...

Page 11

... BANNED SUBSTANCE COMPLIANCE National Semiconductor certifies that the products and packing materials 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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