IC AMP AUDIO PWR 1.9W AB 10MSOP

LM4853MM/NOPB

Manufacturer Part NumberLM4853MM/NOPB
DescriptionIC AMP AUDIO PWR 1.9W AB 10MSOP
ManufacturerNational Semiconductor
SeriesBoomer®
TypeClass AB
LM4853MM/NOPB datasheet
 


Specifications of LM4853MM/NOPB

Output Type1-Channel (Mono) with Stereo HeadphonesMax Output Power X Channels @ Load1.9W x 1 @ 3 Ohm; 300mW x 2 @ 8 Ohm
Voltage - Supply2.4 V ~ 5.5 VFeaturesDepop, Shutdown, Thermal Protection
Mounting TypeSurface MountPackage / Case10-MSOP, Micro10™, 10-uMAX, 10-uSOP
Lead Free Status / RoHS StatusLead free / RoHS CompliantOther namesLM4853MM
LM4853MMTR
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LM4853
Mono 1.5 W / Stereo 300mW Power Amplifier
General Description
The LM4853 is an audio power amplifier capable of deliver-
ing 1.5W (typ) of continuous average power into a mono 4Ω
bridged-tied load (BTL) with 1% THD+N or 95mW per chan-
nel of continuous average power into stereo 32Ω single-
ended (SE) loads with 1% THD+N, using a 5V power supply.
The LM4853 can automatically switch between mono BTL
and stereo SE modes utilizing a headphone sense pin. It is
ideal for any system that provides both a monaural speaker
output and a stereo line or headphone output
Boomer audio power amplifiers were designed specifically to
provide high quality output power with a minimal amount of
external components. Since the LM4853 does not require
bootstrap capacitors or snubber networks, it is optimally
suited for low-power portable systems.
The LM4853 features an externally controlled, micropower
consumption shutdown mode and thermal shutdown protec-
tion. The unity-gain stable LM4853’s gain is set by external
gain-setting resistors
Connection Diagrams
Top View
10 Lead MSOP
Order Number LM4853MM
See NS Package Number MUB10A
Boomer
®
is a registered trademark of National Semiconductor Corporation.
© 2003 National Semiconductor Corporation
Key Specifications
n Output Power at 1% THD+N, 1kHz:
LM4853LD 3Ω BTL
n
LM4853LD 4Ω BTL
n
LM4853MM 4Ω BTL
n
LM4853MM,LD 8Ω BTL
n
LM4853MM,LD 8Ω SE
n
LM4853MM,LD 32Ω SE
n
n THD+N at 1kHz, 95mW into 32Ω SE
n Single Supply Operation
n Shutdown Current
Features
n Mono 1.5W BTL or stereo 300mW output
n Headphone sense
n “Click and pop” suppression circuitry
n No bootstrap capacitors required
n Thermal shutdown protection
n Unity-gain stable
n Available in space-saving MSOP and LLP packaging
Applications
n Portable computers
n Desktop computers
n PDA’s
n Handheld games
20033429
See NS Package Number LDA14A
DS200334
January 2003
1.9W (typ)
1.7W (typ)
1.5W (typ)
1.1W (typ)
300mW (typ)
95mW (typ)
1% (typ)
2.4 to 5.5V
18µA (typ)
20033428
Top View
14 Lead LLP
Order Number LM4853LD
www.national.com

LM4853MM/NOPB Summary of contents

  • Page 1

    ... Connection Diagrams Top View 10 Lead MSOP Order Number LM4853MM See NS Package Number MUB10A Boomer ® registered trademark of National Semiconductor Corporation. © 2003 National Semiconductor Corporation Key Specifications n Output Power at 1% THD+N, 1kHz: LM4853LD 3Ω BTL n LM4853LD 4Ω BTL n LM4853MM 4Ω BTL n LM4853MM,LD 8Ω ...

  • Page 2

    Typical Application FIGURE 1. Typical Audio Amplifier Application Circuit www.national.com 2 20033431 ...

  • 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 ESD Susceptibility (Note 4) ESD Machine model (Note 7) Junction Temperature ( Solder Information (Note 1) Small Outline Package Vapor Phase (60 sec.) Infrared (15 sec ...

  • Page 4

    Electrical Characteristics The following specifications apply for V Symbol Parameter I Supply Current DD I Shutdown Current SD V Output Offset Voltage OS P Output Power O V Shutdown Input Voltage High IH V Shutdown Input Voltage Low IL Electrical ...

  • Page 5

    External Components Description See 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 the amplifier’s ...

  • Page 6

    Typical Performance Characteristics LD Specific Characteristics LM4853LD Power Dissipation vs Output Power Typical Performance Characteristics THD+N vs Frequency THD+N vs Frequency www.national.com (Continued) Power Derating Curve 200334A9 20033463 20033465 6 LM4853LD 200334B0 THD+N vs Frequency 20033464 THD+N vs Frequency 20033466 ...

  • Page 7

    Typical Performance Characteristics THD+N vs Frequency THD+N vs Frequency THD+N vs Output Power (Continued) THD+N vs Frequency 20033467 THD+N vs Output Power 20033439 THD+N vs Output Power 20033441 7 20033468 20033440 20033442 www.national.com ...

  • Page 8

    Typical Performance Characteristics THD+N vs Output Power THD+N vs Output Power THD+N vs Output Power www.national.com (Continued) THD+N vs Output Power 20033443 THD+N vs Output Power 20033445 Output Power vs Load Resistance 20033447 8 20033444 20033446 20033448 ...

  • Page 9

    Typical Performance Characteristics Output Power vs Load Resistance Output Power vs Supply Voltage Power Dissipation vs Output Power (Continued) Output Power vs Supply Voltage 20033449 Dropout Voltage vs Supply Voltage 20033471 Power Dissipation vs Output Power 20033455 9 20033469 20033472 ...

  • Page 10

    Typical Performance Characteristics Power Derating Curve Noise Floor Supply Current vs Supply Voltage www.national.com (Continued) 20033457 Open Loop Frequency Response 20033459 Power Supply Rejection Ratio 20033461 10 Channel Separation 20033480 20033462 20033460 ...

  • Page 11

    Typical Performance Characteristics Application Information BRIDGED AND SINGLE-ENDED OPERATION As shown in Figure 1, the LM4853 contains three operational amplifiers (A1-A3). These amplifiers can be configured for SE or BTL modes. In the SE mode, the LM4853 operates as a ...

  • Page 12

    Application Information amplifier’s closed-loop gain without causing excessive out- put signal clipping, please refer to the Audio Power Ampli- fier Design section. A bridge configuration, such as the one used in LM4853, also creates a second advantage over single-ended amplifi- ...

  • Page 13

    Application Information FIGURE 2. Headphone Control Circuit Also shown in Figure 2 are the electrical connections for the headphone jack and plug. A 3-wire plug consists of a Tip, Ring, and Sleave, where the Tip and Ring are audio signal ...

  • Page 14

    Application Information the upper bandwidth limit. The variation for both response ± limits is 0.17dB, well within the 0.25dB desired limit. This results in 100Hz / 5 = 20Hz 20kHz 100kHz H ...

  • Page 15

    Demonstration Board Layout FIGURE 4. Recommended MM PC Board Layout: FIGURE 5. Recommended MM PC Board Layout: (Continued) 200334A2 Component-Side Layout 200334A3 Bottom-Side Layout 15 www.national.com ...

  • Page 16

    Physical Dimensions www.national.com inches (millimeters) unless otherwise noted 10-Lead Mini SOIC, 118 Mil Wide, .5mm Pitch PKG Order Number LM4853MM NS Package Number MUB10A 16 ...

  • Page 17

    ... 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 ...