LM4861MX/NOPB National Semiconductor, LM4861MX/NOPB Datasheet

no-image

LM4861MX/NOPB

Manufacturer Part Number
LM4861MX/NOPB
Description
Audio Amp Speaker 1-CH Mono 1.1W Class-AB 8-Pin SOIC N T/R
Manufacturer
National Semiconductor
Datasheet

Specifications of LM4861MX/NOPB

Package
8SOIC N
Function
Speaker
Amplifier Type
Class-AB
Total Harmonic Distortion Noise
0.72@8Ohm@1W %
Typical Psrr
65 dB
Output Signal Type
Differential
Maximum Load Resistance
8 Ohm
Output Type
1-Channel Mono
Amplifier Class
AB
No. Of Channels
1
Output Power
1.1W
Supply Voltage Range
2V To 5.5V
Load Impedance
8ohm
Operating Temperature Range
-40°C To +85°C
Amplifier Case Style
SOIC
Rohs Compliant
Yes

Available stocks

Company
Part Number
Manufacturer
Quantity
Price
Part Number:
LM4861MX/NOPB
Manufacturer:
IXYS
Quantity:
4 500
Part Number:
LM4861MX/NOPB
Manufacturer:
NS/国半
Quantity:
20 000
Part Number:
LM4861MX/NOPB
Manufacturer:
TI
Quantity:
14 199
© 2003 National Semiconductor Corporation
LM4861
1.1W Audio Power Amplifier with Shutdown Mode
General Description
The LM4861 is a bridge-connected audio power amplifier
capable of delivering 1.1W of continuous average power to
an 8Ω load with 1% THD+N using a 5V power supply.
Boomer audio power amplifiers were designed specifically to
provide high quality output power with a minimal amount of
external components using surface mount packaging. Since
the LM4861 does not require output coupling capacitors,
bootstrap capacitors, or snubber networks, it is optimally
suited for low-power portable systems.
The LM4861 features an externally controlled, low-power
consumption shutdown mode, as well as an internal thermal
shutdown protection mechanism.
The unity-gain stable LM4861 can be configured by external
gain-setting resistors for differential gains of up to 10 without
the use of external compensation components. Higher gains
may be achieved with suitable compensation.
Connection Diagram
Boomer
®
is a registered trademark of National Semiconductor Corporation.
DS011986
See NS Package Number M08A
Order Number LM4861M
Small Outline Package
Top View
Key Specifications
Features
n No output coupling capacitors, bootstrap capacitors, or
n Small Outline (SO) packaging
n Compatible with PC power supplies
n Thermal shutdown protection circuitry
n Unity-gain stable
n External gain configuration capability
Applications
n Personal computers
n Portable consumer products
n Self-powered speakers
n Toys and games
j
j
j
snubber circuits are necessary
average output power into 8Ω
at 1kHz into 8Ω
THD+N for 1kHz at 1W continuous
Output power at 10% THD+N
Shutdown Current
01198602
February 2003
www.national.com
1.0% (max)
0.6µA (typ)
1.5W (typ)

Related parts for LM4861MX/NOPB

LM4861MX/NOPB Summary of contents

Page 1

... Higher gains may be achieved with suitable compensation. Connection Diagram Boomer ® registered trademark of National Semiconductor Corporation. © 2003 National Semiconductor Corporation Key Specifications j THD+N for 1kHz at 1W continuous average output power into 8Ω ...

Page 2

Typical Application FIGURE 1. Typical Audio Amplifier Application Circuit www.national.com 2 01198601 ...

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

Page 4

High Gain Application Circuit Single Ended Application Circuit *C and C size depend on specific application requirements and constraints. Typical vaiues **Pin 1 should be connected disable the amplifier or to GND to ...

Page 5

External Components Description (Figures 1, 2) Components 1. R Inverting input resistance which sets the closed-loop gain in conjunction with high pass filter with Input coupling capacitor which blocks DC voltage at the amplifier’s ...

Page 6

Typical Performance Characteristics THD+N vs Output Power Output Power vs Supply Voltage Noise Floor vs Frequency www.national.com (Continued) 01198610 Power Dissipation vs 01198618 Supply Current Distribution 01198614 6 Output Power vs Load Resistance 01198617 Output Power 01198616 vs Temperature 01198615 ...

Page 7

Typical Performance Characteristics Supply Current vs Supply Voltage Power Supply Rejection Ratio (Continued) Power Derating Curve 01198612 Frequency Response 01198620 7 01198613 Open Loop 01198619 www.national.com ...

Page 8

Application Information BRIDGE CONFIGURATION EXPLANATION As shown in Figure 1 , the LM4861 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 ...

Page 9

Application Information possible high frequency oscillations. Care should be taken when calculating the −3dB frequency in that an incorrect combination of R and C will cause rolloff before 20kHz typical combination of feedback resistor and capacitor that ...

Page 10

LM4861 MDA MWA 1.1W Audio Power Amplifier with Shutdown Mode DIE/WAFER CHARACTERISTICS Fabrication Attributes Physical Die Identification Die Step Physical Attributes Wafer Diameter Dise Size (Drawn) Thickness Min Pitch Special Assembly Requirements: Note: Actual die size is rounded to the ...

Page 11

LM4861 MDA MWA 1.1W Audio Power Amplifier with Shutdown Mode IN U.S.A Tel #: Fax: IN EUROPE Tel: Fax: IN ASIA PACIFIC Tel: IN JAPAN Tel: (Continued) 1 877 Dial Die 1 877 342 5343 1 207 541 6140 49 ...

Page 12

... NATIONAL’S PRODUCTS ARE NOT AUTHORIZED FOR USE AS CRITICAL COMPONENTS IN LIFE SUPPORT DEVICES OR SYSTEMS WITHOUT THE EXPRESS WRITTEN APPROVAL OF THE PRESIDENT AND GENERAL COUNSEL OF NATIONAL SEMICONDUCTOR CORPORATION. As used herein: 1. Life support devices or systems are devices or systems which, (a) are intended for surgical implant ...

Related keywords