LM4929MM/NOPB National Semiconductor, LM4929MM/NOPB Datasheet

IC AMP AUDIO PWR .08W AB 10MSOP

LM4929MM/NOPB

Manufacturer Part Number
LM4929MM/NOPB
Description
IC AMP AUDIO PWR .08W AB 10MSOP
Manufacturer
National Semiconductor
Series
Boomer®r
Type
Class ABr
Datasheet

Specifications of LM4929MM/NOPB

Output Type
Headphones, 2-Channel (Stereo)
Max Output Power X Channels @ Load
80mW x 2 @ 16 Ohm
Voltage - Supply
2 V ~ 5.5 V
Features
Shutdown, Thermal Protection
Mounting Type
Surface Mount
Package / Case
10-MSOP, Micro10™, 10-uMAX, 10-uSOP
Operational Class
Class-AB
Audio Amplifier Output Configuration
2-Channel Stereo
Output Power (typ)
0.08x2@16OhmW
Audio Amplifier Function
Headphone
Single Supply Voltage (typ)
3/5V
Dual Supply Voltage (typ)
Not RequiredV
Power Supply Requirement
Single
Rail/rail I/o Type
No
Power Supply Rejection Ratio
65dB
Single Supply Voltage (min)
2V
Single Supply Voltage (max)
5.5V
Dual Supply Voltage (min)
Not RequiredV
Dual Supply Voltage (max)
Not RequiredV
Operating Temp Range
-40C to 85C
Operating Temperature Classification
Industrial
Mounting
Surface Mount
Pin Count
10
Package Type
MSOP
For Use With
LM4929MMBD - BOARD EVALUATION LM4929MM
Lead Free Status / RoHS Status
Lead free / RoHS Compliant
Other names
LM4929MM
LM4929MMTR
© 2004 National Semiconductor Corporation
LM4929
Stereo 40mW Low Noise Headphone Amplifier
with OCL Output
General Description
The LM4929 is an stereo audio power amplifier capable of
delivering 40mW per channel of continuous average power
into a 16Ω load or 25mW per channel into a 32Ω load at 1%
THD+N from a 3V power supply.
Boomer audio power amplifiers were designed specifically to
provide high quality output power with a minimal amount of
external components. Since the LM4929 does not require
bootstrap capacitors or snubber networks, it is optimally
suited for low-power portable systems. The LM4929 is con-
figured for OCL (Output Capacitor-Less) outputs, operating
with no DC blocking capacitors on the outputs.
The LM4929 features a low-power consumption shutdown
mode with a faster turn on time. Additionally, the LM4929
features an internal thermal shutdown protection mecha-
nism.
The LM4929 is unity gain stable and may be configured with
external gain-setting resistors.
Block Diagram
Boomer
®
is a registered trademark of National Semiconductor Corporation.
DS201324
FIGURE 1. Block Diagram
Key Specifications
Features
n OCL outputs — No DC Blocking Capacitors
n External gain-setting capability
n Available in space-saving MSOP package
n Ultra low current shutdown mode
n 2V - 5.5V operation
n Ultra low noise
Applications
n Portable CD players
n PDAs
n Portable electronics devices
j
j
j
j
j
from Shutdown V
1% THD+N into a 16Ω load
1% THD+N into a 16Ω load
PSRR at 217Hz and 1kHz
Output Power at 1kHz with V
Output Power at 1kHz with V
Shutdown current
Output Voltage change on release
DD
= 2.4V, R
20132441
L
= 16Ω
DD
DD
= 2.4V,
= 3V,
December 2004
www.national.com
2.0µA (max)
25mW (typ)
40mW (typ)
1mV (max)
65dB (typ)

Related parts for LM4929MM/NOPB

LM4929MM/NOPB Summary of contents

Page 1

... The LM4929 is unity gain stable and may be configured with external gain-setting resistors. Block Diagram Boomer ® registered trademark of National Semiconductor Corporation. © 2004 National Semiconductor Corporation Key Specifications j PSRR at 217Hz and 1kHz j Output Power at 1kHz with V 1% THD+N into a 16Ω ...

Page 2

Typical Application FIGURE 2. Typical OCL Output Configuration Circuit Connection Diagram www.national.com MSOP Package 20132428 Top View (Note 10) Order Number LM4929MM See NS Package Number MUB10A 2 20132481 ...

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 Input Voltage Power Dissipation (Note 3) ESD Susceptibility (Note 4) ESD Susceptibility (Note 5) Electrical Characteristics V The following specifications apply for V 25˚ ...

Page 4

Electrical Characteristics V The following specifications apply for V 25˚C. Pin 3 connected to GND. Symbol Parameter V Output Noise Voltage NO PSRR Power Supply Rejection Ratio T Wake Up Time from Shutdown WU Note 1: All voltages are measured ...

Page 5

Typical Performance Characteristics THD+N vs Frequency THD+N vs Frequency THD+N vs Frequency THD+N vs Frequency 20132482 THD+N vs Frequency 20132406 THD+N vs Frequency 20132405 5 20132483 20132403 20132404 www.national.com ...

Page 6

Typical Performance Characteristics THD+N vs Output Power Output Power vs Load Resistance Output Power vs Supply Voltage www.national.com (Continued) THD+N vs Output Power 20132492 Output Power vs Supply Voltage 20132413 Output Power vs Load Resistance 20132495 6 20132493 20132494 20132497 ...

Page 7

Typical Performance Characteristics Power Supply Rejection Ratio Frequency Response vs Input Capacitor Size Supply Voltage vs Supply Current (Continued) Power Supply Rejection Ratio 201324A5 Open Loop Frequency Response 20132426 20132424 7 201324A6 201324A7 Clipping Voltage vs Supply Voltage 20132425 www.national.com ...

Page 8

Typical Performance Characteristics Shutdown Hysteresis Voltage, V Power Dissipation vs Output Power Power Dissipation vs Output Power V = 2.4V DD www.national.com (Continued Shutdown Hysteresis Voltage 201324B1 Power Dissipation vs Output Power ...

Page 9

Typical Performance Characteristics THD+N vs Output Power V = 2.4V 32Ω THD+N vs Output Power V = 2.4V 16Ω (Continued) THD+N vs Output Power V DD 20132438 Power Derating Curve 20132440 9 ...

Page 10

Application Information AMPLIFIER CONFIGURATION EXPLANATION As shown in Figure 1, the LM4929 has three operational amplifiers internally. Two of the amplifier’s have externally configurable gain while the other amplifier is internally fixed at the bias point acting as a unity-gain ...

Page 11

Application Information The switch and resistor guarantee that the SHUTDOWN pin will not float. This prevents unwanted state changes system with a microprocessor or microcontroller, use a digi- tal output to apply the control voltage to the SHUTDOWN ...

Page 12

Application Information determined based on the tradeoff between the amount of noise suppression that may be needed and minimizing the additional current drawn by the resistor (25mA for a 100Ω resistor and a 5V supply). ESD PROTECTION As stated in ...

Page 13

... 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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