LM4990MM/NOPB National Semiconductor, LM4990MM/NOPB Datasheet

IC AMP AUDIO PWR 2W MONO 8MSOP

LM4990MM/NOPB

Manufacturer Part Number
LM4990MM/NOPB
Description
IC AMP AUDIO PWR 2W MONO 8MSOP
Manufacturer
National Semiconductor
Series
Boomer®r
Type
Class ABr
Datasheet

Specifications of LM4990MM/NOPB

Output Type
1-Channel (Mono)
Max Output Power X Channels @ Load
2W x 1 @ 4 Ohm
Voltage - Supply
2.2 V ~ 5.5 V
Features
Depop, Shutdown
Mounting Type
Surface Mount
Package / Case
8-MSOP, Micro8™, 8-uMAX, 8-uSOP,
Amplifier Class
AB
No. Of Channels
1
Output Power
2W
Supply Voltage Range
2.2V To 5.5V
Load Impedance
8ohm
Operating Temperature Range
-40°C To +85°C
Amplifier Case Style
MSOP
Rohs Compliant
Yes
Lead Free Status / RoHS Status
Lead free / RoHS Compliant
Other names
LM4990MM
LM4990MMTR

Available stocks

Company
Part Number
Manufacturer
Quantity
Price
Part Number:
LM4990MM/NOPB
Manufacturer:
NS
Quantity:
100 000
Part Number:
LM4990MM/NOPB
Manufacturer:
TI/德州仪器
Quantity:
20 000
Company:
Part Number:
LM4990MM/NOPB
Quantity:
1 475
© 2004 National Semiconductor Corporation
LM4990
2 Watt Audio Power Amplifier with Selectable Shutdown
Logic Level
General Description
The LM4990 is an audio power amplifier primarily designed
for demanding applications in mobile phones and other por-
table communication device applications. It is capable of
delivering 1.25 watts of continuous average power to an 8Ω
BTL load and 2 watts of continuous average power (LD and
MH only) to a 4Ω BTL load with less than 1% distortion
(THD+N+N) from a 5V
Boomer audio power amplifiers were designed specifically to
provide high quality output power with a minimal amount of
external components. The LM4990 does not require output
coupling capacitors or bootstrap capacitors, and therefore is
ideally suited for mobile phone and other low voltage appli-
cations where minimal power consumption is a primary re-
quirement.
The LM4990 features a low-power consumption shutdown
mode. To facilitate this, Shutdown may be enabled by either
logic high or low depending on mode selection. Driving the
shutdown mode pin either high or low enables the shutdown
pin to be driven in a likewise manner to enable shutdown.
The LM4990 contains advanced pop & click circuitry which
eliminates noise which would otherwise occur during turn-on
and turn-off transitions.
The LM4990 is unity-gain stable and can be configured by
external gain-setting resistors.
Connection Diagrams
Boomer
®
is a registered trademark of National Semiconductor Corporation.
Mini Small Outline (MSOP) Package
See NS Package Number MUA08A
Order Number LM4990MM
DC
Top View
power supply.
DS200510
200510B9
Key Specifications
Features
n Available in space-saving packages: LLP, Exposed-DAP
n Ultra low current shutdown mode
n Improved pop & click circuitry eliminates noise during
n 2.2 - 5.5V operation
n No output coupling capacitors, snubber networks or
n Unity-gain stable
n External gain configuration capability
n User selectable shutdown High or Low logic Level
Applications
n Mobile Phones
n PDAs
n Portable electronic devices
j
j
THD+N,
j
j
j
j
TSSOP, MSOP, and ITL
turn-on and turn-off transitions
bootstrap capacitors required
Improved PSRR at 217Hz & 1KHz
Power Output at 5.0V, 1%
Power Output at 5.0V, 1% THD+N, 8Ω
Power Output at 3.0V, 1% THD+N, 4Ω
Power Output at 3.0V, 1% THD+N, 8Ω
Shutdown Current
4Ω (LD and MH only)
TT - Die Traceability
G - Boomer Family
A5 - LM4990MM
MSOP Marking
Z - Plant Code
X - Date Code
Top View
20051071
October 2004
600mW (typ)
425mW (typ)
www.national.com
1.25W (typ)
0.1µA (typ)
2W (typ)
62dB

Related parts for LM4990MM/NOPB

LM4990MM/NOPB Summary of contents

Page 1

... Connection Diagrams Mini Small Outline (MSOP) Package Top View Order Number LM4990MM See NS Package Number MUA08A Boomer ® registered trademark of National Semiconductor Corporation. © 2004 National Semiconductor Corporation Key Specifications j Improved PSRR at 217Hz & 1KHz j Power Output at 5.0V, 1% THD+N, 4Ω ...

Page 2

Connection Diagrams LLP Package Top View Order Number LM4990LD See NS Package Number LDA10B 9 Bump micro SMD Top View Order Number LM4990ITL, LM4990ITLX See NS Package Number TLA09ZZA www.national.com (Continued) 200510B3 Exposed-DAP TSSOP Package 20051096 Top View Order Number ...

Page 3

Package Shutdown Mode Typical Power Output at 5V, 1% THD SD_MODE select pin determines the Shutdown Mode for the LD and MH packages, whether Asserted High or an Asserted Low device, to activate shutdown. . ...

Page 4

... Absolute Maximum Ratings If Military/Aerospace specified devices are required, please contact the National Semiconductor Sales Office/ Distributors for availability and specifications. Supply Voltage (Note 11) Storage Temperature Input Voltage Power Dissipation (Notes 3, 12) ESD Susceptibility (Note 4) ESD Susceptibility (Note 5) Junction Temperature Thermal Resistance θ ...

Page 5

Electrical Characteristics V The following specifications apply for the circuit shown in Figure 1, unless otherwise specified. Limits apply for T 25˚C. (Continued) Symbol Parameter Output Power (8Ω (4Ω) T Wake-up time WU THD+N+N Total Harmonic Distortion+Noise PSRR ...

Page 6

Electrical Characteristics V The following specifications apply for the circuit shown in Figure 1, unless otherwise specified. Limits apply for T 25˚C. (Continued) Note 13: The Exposed-DAP of the LDA10B package should be electrically connected to GND or an electrically ...

Page 7

Typical Performance Characteristics THD+N+N vs Frequency 8Ω, and THD+N+N vs Frequency 8Ω, and THD+N+N vs Output Power V = 2.6V ...

Page 8

Typical Performance Characteristics THD+N+N vs Output Power 4Ω, and f = 1kHz DD L THD+N+N vs Output Power V = 2.6V 4Ω, and f = 1kHz DD L Power Supply Rejection Ratio (PSRR) ...

Page 9

Typical Performance Characteristics Power Supply Rejection Ratio (PSRR) vs Frequency 8Ω, input 10Ω terminated DD L Power Supply Rejection Ratio (PSRR) vs Frequency V = 2.6V 8Ω, input 10Ω terminated DD L Open ...

Page 10

Typical Performance Characteristics Power Dissipation vs Output Power Power Dissipation vs Output Power Shutdown Hysteresis Voltage V = 5V, SD Mode = GND DD www.national.com (Continued 200510B5 = 2.6V 200510B7 200510A1 10 Power Dissipation ...

Page 11

Typical Performance Characteristics Shutdown Hysteresis Voltage V = 3V, SD Mode = GND DD Shutdown Hysteresis Voltage V = 2.6V, SD Mode = GND DD Output Power vs Supply Voltage (Continued) 200510A3 200510A5 = 8Ω 200510A6 11 Shutdown ...

Page 12

Typical Performance Characteristics Output Power vs Supply Voltage, R www.national.com (Continued) = 32Ω L 200510A8 12 Frequency Response vs Input Capacitor Size 20051054 ...

Page 13

Application Information BRIDGE CONFIGURATION EXPLANATION As shown in Figure 1, the LM4990 has two internal opera- tional amplifiers. The first amplifier’s gain is externally con- figurable, while the second amplifier is internally fixed in a unity-gain, inverting configuration. The closed-loop ...

Page 14

Application Information external component combinations, consideration to compo- nent values must be used to maximize overall system qual- ity. The LM4990 is unity-gain stable which gives the designer maximum system flexibility. The LM4990 should be used in low gain configurations ...

Page 15

Application Information The LM4990 is unity-gain stable and requires no external components besides gain-setting resistors, an input coupling capacitor, and proper supply bypassing in the typical appli- cation. However closed-loop differential gain of greater than 10 is required, ...

Page 16

Application Information FIGURE 4. DIFFERENTIAL AMPLIFIER CONFIGURATION FOR LM4990 FIGURE 5. REFERENCE DESIGN BOARD SCHEMATIC www.national.com (Continued) 16 20051029 20051025 ...

Page 17

Physical Dimensions inches (millimeters) unless otherwise noted MSOP Order Number LM4990MM NS Package Number MUA08A Exposed-DAP TSSOP Order Number LM4990MH NS Package Number MXF10A 17 www.national.com ...

Page 18

Physical Dimensions X1 = 1.463 www.national.com inches (millimeters) unless otherwise noted (Continued) LLP Order Number LM4990LD NS Package Number LDA10B 9–Bump micro SMD Order Number LM4990ITL, LM4990ITLX NS Package Number TLA09ZZA ± ± 0. 1.463 0. ...

Page 19

... 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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