LM4852LQBD

Manufacturer Part NumberLM4852LQBD
DescriptionBOARD EVALUATION LM4852LQ
ManufacturerNational Semiconductor
SeriesBoomer®
LM4852LQBD datasheet
 


Specifications of LM4852LQBD

Amplifier TypeClass ABOutput Type1-Channel (Mono) with Stereo Headphones
Max Output Power X Channels @ Load1.5W x 1 @ 4 Ohm; 60mW x 2 @ 32 OhmVoltage - Supply2.6 V ~ 5.5 V
Operating Temperature-40°C ~ 85°CBoard TypeFully Populated
Utilized Ic / PartLM4852Lead Free Status / RoHS StatusContains lead / RoHS non-compliant
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LM4852
Integrated Audio Amplifier System
General Description
The LM4852 is an audio power amplifier system capable of
delivering 1.1W (typ) of continuous average power into a
mono 8Ω bridged-tied load (BTL) with 1% THD+N and
60mW (typ) per channel of continuous average power into
stereo 32Ω single-ended (SE) loads with 0.5% THD+N, us-
ing a 5V power supply.
The LM4852 features a 32 step digital volume control and
eight distinct output modes. The digital volume control and
output modes are programmed through a two-wire I
patible control interface, that allows flexibility in routing and
mixing audio channels. The LM4852 has 3 channels: one
pair for a two-channel stereo signal and the third for a
single-channel mono input.
The LM4852 is designed for cellular phone, PDA, and other
portable handheld applications. It delivers high quality output
power from a surface-mount package and requires only
seven external components.
The industry leading micro SMD package only utilizes 2mm
x 2.3mm of PCB space, making the LM4852 the most space
efficient audio sub system available today.
Typical Application
FIGURE 1. Typical Audio Amplifier Application Circuit
Boomer
®
is a registered trademark of National Semiconductor Corporation.
© 2004 National Semiconductor Corporation
Key Specifications
n THD+N at 1kHz, 1.1W into 8Ω BTL
n THD+N at 1kHz, 60mW into 32Ω SE
n Single Supply Operation
Features
n 1.1W (typ) output power with 8Ω mono BTL load
n 60mW (typ) output power with stereo 32Ω SE loads
2
n I
C programmable 32 step digital volume control
2
C com-
(-40.5dB to +6dB)
n Eight distinct output modes
n micro-SMD and LLP surface mount packaging
n "Click and Pop" suppression circuitry
n Thermal shutdown protection
n Low shutdown current (0.1uA, typ)
Applications
n Moblie Phones
n PDAs
DS200606
May 2004
1.0% (typ)
0.5% (typ)
2.6 to 5.0V
20060632
www.national.com

LM4852LQBD 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 Key Specifications n THD+N at 1kHz, 1.1W into 8Ω BTL n THD+N at 1kHz, 60mW into 32Ω Single Supply Operation Features n 1.1W (typ) output power with 8Ω ...

  • Page 2

    Connection Diagrams 18-Bump micro SMD Marking (ITL) Top View X - Date Code T - Die Traceability G - Boomer Family B7 - LM4852ITL LLP Package Top View Order Number LM4852LQ See NS Package Number LQA24A for Exposed-DAP LLP www.national.com ...

  • 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) Vapor Phase (60 sec.) Infrared (15 sec.) Electrical Characteristics 5 ...

  • Page 4

    Electrical Characteristics 5.0 V The following specifications apply for V Symbol Parameter Power Supply Rejection Ratio SPKR OUT PSRR Power Supply Rejection Ratio R and L OUT OUT V Logic High Input Voltage IH V Logic Low Input Voltage IL ...

  • Page 5

    Electrical Characteristics 3.0V 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 Total Harmonic Distortion Plus THD+N Noise N Output Noise OUT PSRR Power ...

  • Page 6

    Electrical Characteristics 3.0V The following specifications apply for V Symbol Parameter Digital Volume Range (R and Digital Volume Stepsize Digital Volume Stepsize Error Phone In Volume Mute Attenuation Phone In Input Impedance R and L Input ...

  • Page 7

    External Components Description Components 1. C This is the input coupling capacitor. It blocks the DC voltage and couples the input signal to the amplifier’s IN input terminals 1/(2π This is the ...

  • Page 8

    Typical Performance Characteristics THD+N vs Frequency THD+N vs Frequency THD+N vs Frequency www.national.com (Continued) THD+N vs Frequency 20060613 THD+N vs Frequency 200606I6 THD+N vs Frequency 20060616 8 20060614 20060615 20060617 ...

  • Page 9

    Typical Performance Characteristics THD+N vs Output Power LM4852LQ THD+N vs Output Power THD+N vs Output Power (Continued) THD+N vs Output Power 200606I7 THD+N vs Output Power 200606I9 THD+N vs Output Power 200606J0 9 LM4852LQ 200606I8 200606H2 200606H3 www.national.com ...

  • Page 10

    Typical Performance Characteristics Power Supply Rejection Ratio Power Supply Rejection Ratio Power Supply Rejection Ratio www.national.com (Continued) Power Supply Rejection Ratio 200606J1 Power Supply Rejection Ratio 200606J3 Power Supply Rejection Ratio 200606J5 10 200606J2 200606J4 200606J6 ...

  • Page 11

    Typical Performance Characteristics Output Power vs Supply Voltage Output Power vs Load Resistance Power Dissipation vs Output Power (Continued) Output Power vs Supply Voltage 200606D7 Output Power vs Load Resistance 200606D9 Power Dissipation vs Output Power 200606E1 11 200606H7 200606H8 ...

  • Page 12

    Typical Performance Characteristics Supply Current vs Supply Voltage Frequency Response G = LIN / RIN gain setting A - weighted filter used www.national.com (Continued) 20060618 200606J7 Output Noise vs Output Mode (V DD Output Mode SPKROUT LOUT/ROUT Output Noise Output ...

  • Page 13

    Application Information PIN DESCRIPTION SDA: This is the serial data input pin. SCL: This is the clock input pin. ADR: This is the address select input pin INTERFACE The LM4852 uses a serial bus, ...

  • Page 14

    Application Information TABLE 1. Data Register BIT D7 D6 Function Name V4 V3 Default 0 0 TABLE 2. Output Mode Selection Handsfree Speaker Output 6dB ...

  • Page 15

    Application Information TABLE 3. Volume Control ...

  • Page 16

    ... LM4852’s thermal shutdown protection. Further detailed and specific information con- cerning PCB layout and fabrication and mounting an LD (LLP) is found in National Semiconductor’s AN1187. 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 17

    Application Information mum stereo power dissipation without exceeding the maxi- mum junction temperature is approximately 104˚C for the IBL package. θ JMAX DMAX-TOTAL JA Equation (8) gives the maximum junction temperature the result violates ...

  • Page 18

    Demonstration ITL Board Layout Recommended ITL PC Board Layout: Top Overlay Layer Recommended ITL PC Board Layout: Middle 1 Layer www.national.com 20060605 Recommended ITL PC Board Layout: 20060603 Recommended ITL PC Board Layout: 20060601 Recommended ITL PC Board Layout: Bottom ...

  • Page 19

    Demonstration LQ Board Layout Recommended LQ PC Board Layout: Top Overlay Layer Recommended LQ PC Board Layout: Middle 1 Layer 20060610 Recommended LQ PC Board Layout: 20060608 Recommended LQ PC Board Layout: Recommended LQ PC Board Layout: Bottom Layer 19 ...

  • Page 20

    Physical Dimensions 24-Lead MOLDED PKG, Leadless Leadframe Package LLP www.national.com inches (millimeters) unless otherwise noted Order Number LM4852LQ NS Package Number LQA24A 20 ...

  • Page 21

    ... 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. ...