LM4864N National Semiconductor, LM4864N Datasheet

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LM4864N

Manufacturer Part Number
LM4864N
Description
IC AMP AUDIO PWR .725W MONO 8DIP
Manufacturer
National Semiconductor
Series
Boomer®r
Type
Class ABr
Datasheet

Specifications of LM4864N

Output Type
1-Channel (Mono)
Max Output Power X Channels @ Load
725mW x 1 @ 8 Ohm
Voltage - Supply
2.7 V ~ 5.5 V
Features
Shutdown, Thermal Protection
Mounting Type
Through Hole
Package / Case
8-DIP (0.300", 7.62mm)
Lead Free Status / RoHS Status
Contains lead / RoHS non-compliant
Other names
*LM4864N

Available stocks

Company
Part Number
Manufacturer
Quantity
Price
Part Number:
LM4864N
Manufacturer:
NSC
Quantity:
5 510
Part Number:
LM4864N
Manufacturer:
UNIT
Quantity:
5 510
Part Number:
LM4864N
Manufacturer:
NS/国半
Quantity:
20 000
© 2004 National Semiconductor Corporation
LM4864
725mW Audio Power Amplifier with Shutdown Mode
General Description
The LM4864 is a bridged audio power amplifier capable of
delivering 725mW of continuous average power into an 8Ω
load with 1% THD+N from a 5V power supply.
Boomer
to provide high quality output power from a low supply volt-
age while requiring a minimal amount of external compo-
nents. Since the LM4864 does not require output coupling
capacitors, bootstrap capacitors or snubber networks, it is
optimally suited for low-power portable applications.
The LM4864 features an externally controlled, low power
consumption shutdown mode, and thermal shutdown protec-
tion.
The closed loop response of the unity-gain stable LM4864
can be configured by external gain-setting resistors. The
device is available in multiple package types to suit various
applications.
Key Specifications
Typical Application
j
Boomer
LM4864LD, 4Ω load
LM4864LD, 8Ω load
P
O
®
at 1% THD+N with V
is a registered trademark of National Semiconductor Corporation.
®
audio power amplifiers were designed specifically
DD
= 5V, 1kHz
FIGURE 1. Typical Audio Amplifier Application Circuit
DS012607
625mW (typ)
725mW (typ)
* Not recommended for new designs. Contact NSC Audio
Marketing.
Features
n MSOP, SOP, DIP
n No output coupling capacitors, bootstrap capacitors, or
n Thermal shutdown protection circuitry
n Unity-gain stable
n External gain configuration capability
* Not recommended for new designs. Contact NSC Audio
Marketing.
Applications
n Cellular phones
n Personal computers
n General purpose audio
j
snubber circuits are necessary
LM4864M & LM4864N
LM4864MM, 8Ω load (Note 10)
LM4864, 16Ω load
Shutdown current
*
, and LD packaging
*
, 8Ω load
01260701
September 2004
675mW (typ)
300mW (typ)
550mW (typ)
www.national.com
0.7µA (typ)

Related parts for LM4864N

LM4864N Summary of contents

Page 1

... Typical Application FIGURE 1. Typical Audio Amplifier Application Circuit Boomer ® registered trademark of National Semiconductor Corporation. © 2004 National Semiconductor Corporation LM4864M & LM4864N LM4864MM, 8Ω load (Note 10) LM4864, 16Ω load j Shutdown current * Not recommended for new designs. Contact NSC Audio Marketing. ...

Page 2

... Not recommended for new designs. Contact NSC Audio Marketing 725MW AUDIO POWER AMPLIFIER WITH SHUTDOWN MODE www.national.com MSOP, SOP, and DIP Package 01260702 Top View Order Number LM4864MM, * LM4864M or LM4864N See NS Package Number MUA08A, * M08A or N08E LD Package 01260730 Top View Order Number LM4864LD, ...

Page 3

... PIN1 THD = 1% (max kHz; R LM4864LD (Note 11) THD = 1% (max kHz; R LM4864LD (Note 11) THD = 1% (max kHz; R LM4864MM (Note 10) THD = 1% (max kHz LM4864M and LM4864N THD kHz 16Ω 300 mWrms ≤ f ≤ 20 kHz, BW < 80kHz V = 4.9V–5. (Note 1) (Note 3V, for all available packages, unless otherwise specified. Limits apply for T ...

Page 4

Electrical Characteristics V The following specifications apply for V 25˚C Symbol Parameter V Output Offset Voltage OS P Output Power O THD+N Total Harmonic Distortion+Noise PSRR Power Supply Rejection Ratio Note 1: All voltages are measured with respect to the ...

Page 5

External Components Description 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 the amplifier’s input terminals. Also ...

Page 6

Typical Performance Characteristics THD+N vs Frequency THD+N vs Output Power THD+N vs Output Power www.national.com (Continued) 01260707 THD+N vs Output Power 01260709 THD+N vs Output Power 01260711 6 THD+N vs Frequency 01260708 01260710 01260712 ...

Page 7

Typical Performance Characteristics THD+N vs Output Power Output Power vs Supply Voltage Output Power vs Supply Voltage (Continued) THD+N vs Output Power 01260713 01260715 01260717 7 01260714 Output Power vs Supply Voltage 01260716 Output Power vs Load Resistance 01260718 www.national.com ...

Page 8

Typical Performance Characteristics Power Dissipation vs Output Power Dropout Voltage vs Supply Voltage Frequency Response vs Input Capacitor Size www.national.com (Continued) 01260719 01260721 01260723 8 Power Derating Curve 01260720 Noise Floor 01260722 Power Supply Rejection Ratio 01260724 ...

Page 9

Typical Performance Characteristics Open Loop Frequency Response Typical Performance Characteristics for the LM4864LD THD+N vs Frequency THD+N vs Power Out (Continued) 01260725 01260731 01260733 9 Supply Current vs Supply Voltage 01260726 (Note 11) THD+N vs Frequency 01260732 THD+N vs Power ...

Page 10

Typical Performance Characteristics for the LM4864LD Output Power vs Supply Voltage www.national.com Power Dissipation vs Output Power 01260735 10 (Note 11) (Continued) 01260736 ...

Page 11

... Further detailed and specific information concerning PCB layout, fabrication, and mounting an LD (LLP) package is available from National Semiconductor’s Package Engineer- ing Group under application note AN1187. POWER SUPPLY BYPASSING As with any power amplifier, proper supply bypassing is critical for low noise performance and high power supply rejection ...

Page 12

Application Information draw will be minimized in idle mode. While the device will be disabled with shutdown pin voltages less than V current may be greater than the typical value of 0.7 µA. In either case, the shutdown pin should ...

Page 13

Application Information The high frequency pole is determined by the product of the desired high frequency pole and the differential gain With and f = 100 kHz, the resulting GBWP VD ...

Page 14

LM4864 MDC MWC 725MW Audio Power Amplifier With Shutdown Mode 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 nearest micron. ...

Page 15

LM4864 MDC MWC 725MW Audio Power Amplifier With Shutdown Mode IN U.S.A Tel #: Fax: IN EUROPE Tel: Fax: IN ASIA PACIFIC Tel: IN JAPAN Tel: 1 877 Dial Die 1 877 342 5343 1 207 541 6140 49 (0) ...

Page 16

Physical Dimensions 8-Lead (0.150" Wide) Molded Small Outline Package, JEDEC www.national.com inches (millimeters) unless otherwise noted Order Number LM4864M NS Package Number M08A 16 ...

Page 17

... Wide) Molded Dual-In-Line Package * Not recommended for new designs. Contact NSC Audio Marketing. 8-Lead (0.118" Wide) Molded Mini Small Outline Package * Order Number LM4864N * NS Package Number N08E Order Number LM4864MM NS Package Number MUA08A 17 www ...

Page 18

... 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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