LM4853

Manufacturer Part NumberLM4853
ManufacturerTexas Instruments
LM4853 datasheet
 


Specifications of LM4853

Speaker ChannelsStereoPin/package10VSSOP, 14SON, 14UQFN, 14VSON, 14WSON
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LM4853
LM4853 Mono 1.5 W / Stereo 300mW Power Amplifier
Literature Number: SNAS155D

LM4853 Summary of contents

  • Page 1

    ... LM4853 LM4853 Mono 1 Stereo 300mW Power Amplifier Literature Number: SNAS155D ...

  • Page 2

    ... 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 ...

  • Page 3

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

  • Page 4

    ... THD+N = 1%; LM4853LD BTL Mode 4Ω L THD+N = 1%; LM4853MM BTL Mode 8Ω L THD+N = 1%; LM4853MM Mode 8Ω L THD+N = 1%; LM4853MM Mode 32Ω L THD+N = 1%; LM4853MM, LD < Is 80µA > Is 0.5mA SE Mode 32Ω 1kHz L 3 194˚C/W 52˚C/W 56˚C/W 4.3˚C/W (Note 2) − ...

  • Page 5

    ... IC with no external series resistor (resistance of discharge path must be under 50Ω). Note 8: All voltages are measured with respect to the ground pin, unless otherwise specified. Note 9: Limits are guaranteed to National’s AOQL ( Average Outgoing Quality Level ). Note 10: The given θ is for an LM4853LD with the Exposed-DAP soldered to an exposed 1in JA www.national.com (Notes 3.3V 25˚ ...

  • Page 6

    ... THD+N vs Output Power Functional Description 1/(2π 1/(2π Refer to the section, Proper Selection of External Components 1/(2π 200334A5 200334A7 5 . This resistor also forms LM4853LD THD+N vs Frequency 200334A6 LM4853LD THD+N vs Output Power 200334A8 www.national.com ...

  • Page 7

    ... 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 8

    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 9

    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 10

    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 11

    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 12

    ... Package Engineering Group under application note AN1187. V BRIDGE CONFIGURATION EXPLANATION When the LM4853 is in BTL mode, the output of amplifier A1 serves as the input to amplifier A2, which results in both amplifiers producing signals identical in magnitude, but out of phase by 180˚. Consequently, the differential gain for the ...

  • Page 13

    ... This also interrupts the voltage divider set up by the resistors R HP-IN pin, switching the LM4853 out of BTL mode and into SE mode. The amplifier then drives the headphones, whose impedance is in parallel with resistors R ...

  • Page 14

    ... PROPER SELECTION OF EXTERNAL COMPONENTS Proper selection of external components in applications us- ing integrated power amplifiers is critical for optimum device and system performance. While the LM4853 is tolerant to a variety of external component combinations, consideration must be given to the external component values that maxi- mize overall system quality. ...

  • Page 15

    ... GBWP = 150kHz which is much smaller than the LM4853 GBWP of 10MHz. This difference indicates that a designer can still use the LM4853 at higher differential gains without bandwidth limitations. PCB LAYOUT AND SUPPLY REGULATION CONSIDERATIONS FOR DRIVING 3Ω AND 4Ω LOADS Power dissipated by a load is a function of the voltage swing across the load and the load’ ...

  • Page 16

    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 17

    ... 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 18

    ... National does not assume any responsibility for use of any circuitry described, no circuit patent licenses are implied and National reserves the right at any time without notice to change said circuitry and specifications. inches (millimeters) unless otherwise noted (Continued) 14-Lead LLP, 118 Mil Wide, .8mm Pitch PKG Order Number LM4853LD NS Package Number LDA14A 2. A critical component is any component of a life ...

  • Page 19

    ... Texas Instruments Incorporated and its subsidiaries (TI) reserve the right to make corrections, modifications, enhancements, improvements, and other changes to its products and services at any time and to discontinue any product or service without notice. Customers should obtain the latest relevant information before placing orders and should verify that such information is current and complete. All products are sold subject to TI’ ...