LM4859SP

Manufacturer Part NumberLM4859SP
DescriptionAudio Amp Headphone/Speaker 2-CH Stereo 1.6W Class-AB 28-Pin LLP EP T/R
ManufacturerNational Semiconductor
LM4859SP datasheet
 


Specifications of LM4859SP

Package28LLP EPFunctionHeadphone/Speaker
Amplifier TypeClass-ABTotal Harmonic Distortion Noise0.04@32Ohm@15mW|0.05@8Ohm@400mW %
Typical Psrr86 dBOutput Signal TypeDifferential|Single
Output Type2-Channel StereoMaximum Input Offset Voltage40@5V mV
Maximum Load Resistance32 Ohm  
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LM4859
Stereo 1.2W Audio Sub-system with 3D Enhancement
General Description
The LM4859 is an integrated audio sub-system designed for
stereo cell phone applications. Operating on a 3.3V supply, it
combines a stereo speaker amplifier delivering 495mW per
channel into an 8Ω load and a stereo headphone amplifier
delivering 33mW per channel into a 32Ω load. It integrates
the audio amplifiers, volume control, mixer, power manage-
ment control, and National 3D enhancement all into a single
package. In addition, the LM4859 routes and mixes the
stereo and mono inputs into 10 distinct output modes. The
2
LM4859 is controlled through an I
C compatible interface.
Other features include an ultra-low current shutdown mode
and thermal shutdown protection.
Boomer audio power amplifiers are designed specifically to
provide high quality output power with a minimal amount of
external components.
The LM4859 is available in a 30–bump TL package and a
28–lead LLP package.
Boomer
®
is a registered trademark of National Semiconductor Corporation.
© 2006 National Semiconductor Corporation
Key Specifications
j
P
, Stereo Loudspeakers, 4Ω, 5V,
OUT
1% THD+N (LM4859SP)
j
P
, Stereo Loudspeakers, 8Ω, 5V,
OUT
1% THD+N
j
P
, Stereo Headphones, 32Ω, 5V,
OUT
1% THD+N
j
P
, Stereo Loudspeakers, 8Ω, 3.3V,
OUT
1% THD+N
j
P
, Stereo Headphones, 32Ω, 3.3V,
OUT
1% THD+N
j
Shutdown Current
Features
n Stereo speaker amplifier
n Stereo headphone amplifier
n Independent Left, Right, and Mono volume controls
n National 3D enhancement
2
n I
C compatible interface
n Ultra low shutdown current
n Click and Pop Suppression circuit
n 10 distinct output modes
n Thermal Shutdown Protection
n Available in micro SMD and LLP packages
Applications
n Cell Phones
n PDAs
n Portable Gaming Devices
n Internet Appliances
n Portable DVD/CD/AAC/MP3 players
DS201061
June 2005
1.6W (typ)
1.2W (typ)
75mW (typ)
495mW (typ)
33mW (typ)
0.06µA (typ)
www.national.com

LM4859SP Summary of contents

  • Page 1

    ... The LM4859 is available in a 30–bump TL package and a 28–lead LLP package. Boomer ® registered trademark of National Semiconductor Corporation. © 2006 National Semiconductor Corporation Key Specifications Stereo Loudspeakers, 4Ω, 5V, OUT 1% THD+N (LM4859SP Stereo Loudspeakers, 8Ω, 5V, OUT 1% THD Stereo Headphones, 32Ω, 5V, OUT 1% THD+N ...

  • Page 2

    Typical Application FIGURE 1. Typical Audio Amplifier Application Circuit www.national.com 2 20106101 ...

  • Page 3

    Connection Diagrams 30 Bump TL Package Top View (Bump-side down) Order Number LM4859TL See NS Package Number TLA30CZA Pin Connections (TL) Pin ...

  • Page 4

    ... Connection Diagram www.national.com 28 – Lead SP Package Top View Order Number LM4859SP See NS Package Number SPA28A 4 20106199 ...

  • Page 5

    Pin Connections (SP) Pin Name RHP Right Headphone Output V Power Supply ...

  • Page 6

    ... DD = 5.0V, unless otherwise specified. Limits apply for T DD Conditions V = 0V, No load; IN LD5 = RD5 = 0 (Note 9) Mode Mode 12, 13 Output mode 0 (Note 9) LM4859SP Speaker; THD 1kHz; 4Ω BTL Speaker; THD 1kHz; 8Ω BTL Headphone; THD 1kHz; 32Ω SE LD5 = RD5 = 0 Speaker 400mW 1kHz; 8Ω BTL Headphone ...

  • Page 7

    ... DD = 3.0V, unless otherwise specified. Limits apply for T DD Conditions V = 0V, No load; IN LD5 = RD5 = 0 (Note 9) Mode Mode 12, 13 Mode 0 (Note 9) LM4859SP Speaker; THD 1kHz; 4Ω BTL Speaker; THD 1kHz; 8Ω BTL Headphone; THD 1kHz; 32Ω SE LD5 = RD5 = 0 Speaker 200mW 1kHz; 8Ω BTL Headphone ...

  • Page 8

    Audio Amplifier Electrical Characteristics V The following specifications apply for V Symbol Parameter Xtalk Crosstalk T Wake-up Time WU Volume Control Electrical Characteristics The following specifications apply for V Symbol Parameter Stereo Volume Control Range Mono Volume Control Range Volume ...

  • Page 9

    ... Note 8: Datasheet min/max specification limits are guaranteed by design, test, or statistical analysis. Note 9: Shutdown current and supply current are measured in a normal room environment. All digital input pins are connected to I Note 10: The given θ is for an LM4859SP mounted on a PCB with a 2in JA Note 11: “0dB gain” refers to the volume control gain setting of M Note 12: The given θ ...

  • Page 10

    ... LM4859SP THD+N vs Output Power V = 5V; LLS, RLS 1kHz 4Ω; Mode 7; 0dB Gain L www.national.com (Note 11) 20106155 = 400mW; O 20106157 10 LM4859SP THD+N vs Frequency 20106156 V = 3V; LLS, RLS 200mW 4Ω; Mode 7; 0dB Gain L LM4859SP THD+N vs Output Power 20106158 V = 3V; LLS, RLS 1kHz 4Ω; Mode 7; 0dB Gain L ...

  • Page 11

    Typical Performance Characteristics THD+N vs Frequency V = 5V; LLS, RLS 400mW 8Ω; Mode 7; 0dB Gain L THD+N vs Frequency V = 5V; LHP, RHP 32Ω; Mode 9; ...

  • Page 12

    Typical Performance Characteristics THD+N vs Output Power V = 5V; LLS, RLS 1kHz 8Ω; Mode 7; 0dB Gain L THD+N vs Output Power V = 5V; LHP, RHP 1kHz 32Ω; ...

  • Page 13

    Typical Performance Characteristics PSRR vs Frequency V = 5V; LLS, RLS 8Ω; 0db Gain All audio inputs terminated Top-Mode 12, 13; Mid-Mode 2, 3; Bot-Mode 7, 8 PSRR vs Frequency V = 5V; LHP, RHP; R ...

  • Page 14

    Typical Performance Characteristics Crosstalk vs Frequency V = 5V; LLS, RLS 400mW Mode 7; 0db Gain; 3D off Top-Left to Right; Bot-Right to Left Crosstalk vs Frequency V = 5V; LHP, RHP 15mW; ...

  • Page 15

    Typical Performance Characteristics Frequency vs Response LLS, RLS 8Ω; L Mode 2; Full Gain Frequency vs Response LHP, RHP 32Ω Mode 4; Full Gain (Note 11) (Continued) 20106138 20106140 = 100µF LHP, RHP; ...

  • Page 16

    Typical Performance Characteristics Power Dissipation vs Output Power = 8Ω; THD+N ≤ 1% LLS, RLS Top-V = 5V; Bot-V DD per channel Output Power vs Load Resistance LLS, RLS 8Ω; L Top-V = 5V, 10% THD+N; ...

  • Page 17

    Typical Performance Characteristics Output Power vs Supply Voltage LLS, RLS 8Ω; L Top–10% THD+N; Bot–1% THD+N (Note 11) (Continued) Output Power vs Supply Voltage 20106152 LHP, RHP; R Top–10% THD+N; Bot–1% THD+N 17 20106153 = 32Ω; L www.national.com ...

  • Page 18

    Application Information A7 A6 Chip Address 1 ADR = 0 1 ADR = externally configured by ADR pin Mono Volume control Left Volume control Right Volume control Mode control www.national.com 2 FIGURE Bus ...

  • Page 19

    Application Information MD4 MD3 ...

  • Page 20

    Application Information LD4//RD4 LD3//RD3 ...

  • Page 21

    Application Information Mode CD3 CD2 ...

  • Page 22

    Application Information COMPATIBLE INTERFACE The LM4859 uses a serial bus, which conforms to the I protocol, to control the chip’s functions with two wires: clock (SCL) and data (SDA). The clock line is uni-directional. The data line ...

  • Page 23

    Application Information shown in the Demonstration Board Layout section. Further detailed and specific information concerning PCB layout and fabrication and mounting an SP (LLP) is found in National Semiconductor’s AN1187. PCB LAYOUT AND SUPPLY REGULATION CONSIDERATIONS FOR DRIVING 3Ω AND ...

  • Page 24

    Application Information For a typical application with a 5V power supply, stereo 8Ω loudspeaker load, and the stereo 32Ω headphone load, the maximum ambient temperature that allows maximum stereo power dissipation without exceeding the maximum junction temperature is approximately 93.4˚C ...

  • Page 25

    Application Information FIGURE 4. Reference Design Board Schematic (Continued) 25 20106102 www.national.com ...

  • Page 26

    Demonstration Board Layout Recommended SP PCB Layout: Silkscreen Layer Recommended SP PCB Layout: Mid Layer www.national.com 20106162 Recommended SP PCB Layout: 20106161 Recommended SP PCB Layout: Bottom Layer 26 20106159 Top Layer 20106160 ...

  • Page 27

    Revision History Rev 1.1 1.2 Date 6/02/05 Added Modes 9 and 14 into Mode 4 (Conditions) for the Idd under Elect.Char tables 5V and 3V, then re-released D/S to the WEB (per Alvin Fok). (MC) 06/06/06 Edited the micro SMD ...

  • Page 28

    Physical Dimensions www.national.com inches (millimeters) unless otherwise noted 30 Bump TL Package Order Number LM4859TL NS Package Number TLA30CZA 28 ...

  • Page 29

    ... Deutsch Tel: +49 (0) 69 9508 6208 English www.national.com Français Tel: +33 ( 8790 28 – Lead SP Package Order Number LM4859SP NS Package Number SPA28A 2. A critical component is any component of a life support device or system whose failure to perform can be reasonably expected to cause the failure of the life support device or system affect its safety or effectiveness ...