LM4900MMBD National Semiconductor, LM4900MMBD Datasheet

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LM4900MMBD

Manufacturer Part Number
LM4900MMBD
Description
BOARD EVALUATION LM4900MM
Manufacturer
National Semiconductor
Series
Boomer®r
Datasheet

Specifications of LM4900MMBD

Amplifier Type
Class AB
Output Type
1-Channel (Mono)
Max Output Power X Channels @ Load
675mW x 1 @ 8 Ohm
Voltage - Supply
2 V ~ 5.5 V
Operating Temperature
-40°C ~ 85°C
Board Type
Fully Populated
Utilized Ic / Part
LM4900
Lead Free Status / RoHS Status
Contains lead / RoHS non-compliant
© 2004 National Semiconductor Corporation
LM4900
265mW at 3.3V Supply Audio Power Amplifier with
Shutdown Mode
General Description
The LM4900 is a bridged audio power amplifier capable of
delivering 265mW of continuous average power into an 8Ω
load with 1% THD+N from a 3.3V power supply.
Boomer
to provide high quality output power from a low supply volt-
age while requiring a minimal amount of external compo-
nents. Since the LM4900 does not require output coupling
capacitors, bootstrap capacitors or snubber networks, it is
optimally suited for low-power portable applications.
The LM4900 features an externally controlled, low power
consumption shutdown mode, and thermal shutdown protec-
tion.
The closed loop response of the unity-gain stable LM4900
can be configured by external gain-setting resistors.
Key Specifications
Typical Application
j
Boomer
THD+N at 1kHz for 265mW continuous
average output power into 8Ω,
V
DD
®
is a registered trademark of National Semiconductor Corporation.
®
= 3.3V
audio power amplifiers were designed specifically
FIGURE 1. Typical Audio Amplifier Application Circuit
DS200064
1.0% (max)
Features
n MSOP, LLP, and SOP packaging
n No output coupling capacitors, bootstrap capacitors, or
n Thermal shutdown protection circuitry
n Unity-gain stable
n External gain configuration capability
n Latest generation "click and pop" suppression circuitry
Applications
n Cellular phones
n PDA’s
n Any portable audio application
j
j
snubber circuits are necessary
THD+N at 1kHz for 675mW continuous
Shutdown current
average output power into 8Ω,
V
DD
= 5V
20006401
September 2001
www.national.com
1.0% (max)
0.1µA (typ)

Related parts for LM4900MMBD

LM4900MMBD Summary of contents

Page 1

... THD+N at 1kHz for 265mW continuous average output power into 8Ω 3.3V DD Typical Application FIGURE 1. Typical Audio Amplifier Application Circuit Boomer ® registered trademark of National Semiconductor Corporation. © 2004 National Semiconductor Corporation j THD+N at 1kHz for 675mW continuous average output power into 8Ω ...

Page 2

Connection Diagrams www.national.com MSOP and SOP Package 20006402 Top View Order Number LM4900MM, LM4900M See NS Package Number MUA08A, M08A LLP Package Top View Order Number LM4900LD See NS Package Number LDA08B 2 20006476 ...

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) Junction Temperature Soldering Information Small Outline Package Vapor Phase (60 sec ...

Page 4

Electrical Characteristics The following specifications apply for V 25˚C Symbol Parameter PSRR Power Supply Rejection Ratio Electrical Characteristics The following specifications apply for V 25˚C Symbol Parameter I Quiescent Power Supply Current DD I Shutdown Current SD V Output Offset ...

Page 5

External Components Description 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 input terminals. Also ...

Page 6

Typical Performance Characteristics THD+N vs Frequency THD+N vs Frequency THD+N vs Frequency www.national.com (Continued) THD+N vs Frequency 20006434 THD+N vs Frequency 20006436 THD+N vs Frequency 20006438 6 20006435 20006437 20006439 ...

Page 7

Typical Performance Characteristics THD+N vs Frequency THD+N vs Output Power THD+N vs Output Power (Continued) THD+N vs Output Power 20006440 THD+N vs Output Power 20006442 THD+N vs Output Power 20006444 7 20006441 20006443 20006445 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 20006446 THD+N vs Output Power 20006448 THD+N vs Output Power 20006450 8 20006447 20006449 20006451 ...

Page 9

Typical Performance Characteristics Output Power vs Supply Voltage Output Power vs Supply Voltage Output Power vs Load Resistance (Continued) Output Power vs Supply Voltage 20006452 Output Power vs Supply Voltage 20006454 Power Dissipation vs Output Power 20006456 9 20006453 20006455 ...

Page 10

Typical Performance Characteristics Power Dissipation vs Output Power Clipping Voltage vs Supply Voltage Noise Floor www.national.com (Continued) Power Dissipation vs Output Power 20006458 Noise Floor 20006460 Frequency Response vs Input Capacitor Size 20006462 10 20006459 20006461 20006471 ...

Page 11

Typical Performance Characteristics Power Supply Rejection Ratio Power Supply Rejection Ratio Power Supply Rejection Ratio vs Supply Voltage (Continued) Power Supply Rejection Ratio 20006463 Power Supply Rejection Ratio 20006465 Power Supply Rejection Ratio vs Supply Voltage 20006467 11 20006464 20006466 ...

Page 12

Typical Performance Characteristics Supply Current vs Shutdown Voltage Supply Current vs Supply Voltage Open Loop Frequency Response Note 12: This curve shows the LM4900LD’s thermal dissipation ability at different ambient temperatures given the exposed-DAP of the part is soldered to ...

Page 13

... Further detailed and specific informa- tion concerning PCB layout, fabrication, and mounting an LD (LLP) package is available from National Semiconductor’s Package Engineering Group under application note AN1187. BRIDGE CONFIGURATION EXPLANATION ...

Page 14

Application Information Typical applications employ a 5V regulator with 10µF and a 0.1µF bypass capacitors which aid in supply stability, but do not eliminate the need for bypassing the supply nodes of the LM4900. The selection of bypass capacitors, especially ...

Page 15

Application Information From Equation 5, the minimum A is 1.55; use A VD Since the desired input impedance was 20 kΩ, and with ratio of 1 results in an allocation of ...

Page 16

Physical Dimensions 8-Lead (0.118" Wide) Molded Mini Small Outline Package www.national.com inches (millimeters) unless otherwise noted Order Number LM4900MM NS Package Number MUA08A Order Number LM4900LD NS Package Number LDA08B 16 ...

Page 17

... 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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