LM4901MMBD National Semiconductor, LM4901MMBD Datasheet

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LM4901MMBD

Manufacturer Part Number
LM4901MMBD
Description
BOARD EVALUATION LM4901MM
Manufacturer
National Semiconductor
Series
Boomer®r
Datasheet

Specifications of LM4901MMBD

Amplifier Type
Class AB
Output Type
1-Channel (Mono)
Max Output Power X Channels @ Load
1.6W x 1 @ 4 Ohm
Voltage - Supply
2 V ~ 5.5 V
Operating Temperature
-40°C ~ 85°C
Board Type
Fully Populated
Utilized Ic / Part
LM4901
Lead Free Status / RoHS Status
Contains lead / RoHS non-compliant
© 2006 National Semiconductor Corporation
LM4901
1.6 Watt Audio Power Amplifier with Selectable
Shutdown Logic Level
General Description
The LM4901 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 watt of continuous average power to an 8Ω BTL
load and 1.6 watts of continuous avearge power to a 4Ω BTL
load with less than 1% distortion (THD+N) from a 5V
power supply.
Boomer audio power amplifiers were designed specifically to
provide high quality output power with a minimal amount of
external components. The LM4901 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 LM4901 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 LM4901 contains advanced pop & click circuitry which
eliminates noise which would otherwise occur during turn-on
and turn-off transitions.
The LM4901 is unity-gain stable and can be configured by
external gain-setting resistors.
Typical Application
Boomer
®
is a registered trademark of National Semiconductor Corporation.
FIGURE 1. Typical Audio Amplifier Application Circuit
DS200198
DC
Key Specifications
Features
n Available in space-saving packages: LLP and MSOP
n Ultra low current shutdown mode
n BTL output can drive capacitive loads
n Improved pop & click circuitry eliminates noise during
n 2.0 - 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
j
j
j
j
turn-on and turn-off transitions
bootstrap capacitors required
Improved PSRR at 217Hz & 1KHz
Power Output at 5.0V, 1% THD, 4Ω
Power Output at 5.0V, 1% THD, 8Ω
Power Output at 3.0V, 1% THD, 4Ω
Power Output at 3.0V, 1% THD, 8Ω
Shutdown Current
20019801
525mW (typ)
390mW (typ)
www.national.com
1.07W (typ)
0.1µA (typ)
1.6W (typ)
July 2006
62dB

Related parts for LM4901MMBD

LM4901MMBD Summary of contents

Page 1

... The LM4901 is unity-gain stable and can be configured by external gain-setting resistors. Typical Application FIGURE 1. Typical Audio Amplifier Application Circuit Boomer ® registered trademark of National Semiconductor Corporation. © 2006 National Semiconductor Corporation Key Specifications j Improved PSRR at 217Hz & 1KHz j Power Output at 5.0V, 1% THD, 4Ω ...

Page 2

Connection Diagrams Mini Small Outline (MSOP) Package Top View Order Number LM4901MM See NS Package Number MUB10A LLP Package Top View Order Number LM4901LD See NS Package Number LDA10B www.national.com 20019836 Bottom Line - Part Number 200198B3 2 MSOP Marking ...

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 (Note 10) Storage Temperature Input Voltage Power Dissipation (Notes 3, 11) ESD Susceptibility (Note 4) ESD Susceptibility (Note 5) Junction Temperature Thermal Resistance Electrical Characteristics V The following specifications apply for the circuit shown in Figure 1, unless otherwise specified ...

Page 4

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 Total Harmonic Distortion + ...

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) Note 12: The Exposed-DAP of the LDA10B package should be electrically connected to GND or an electrically ...

Page 6

Typical Performance Characteristics THD+N vs Frequency 5V, 8Ω and PWR = 500mW DD L THD+N vs Frequency 2.6V, 8Ω and PWR = 150mW DD L THD+N vs Power Out at ...

Page 7

Typical Performance Characteristics THD+N vs Power Out 2.6V, 8Ω 1kHz DD L Power Supply Rejection Ratio (PSRR) vs Frequency 5V, 8Ω Input terminated with 10Ω (Continued) 20019884 Power Supply Rejection ...

Page 8

Typical Performance Characteristics Power Supply Rejection Ratio (PSRR) vs Frequency 3V, 8Ω Input terminated with 10Ω Power Supply Rejection Ratio (PSRR) vs Frequency 2.6V, 8Ω Input terminated with 10Ω Open ...

Page 9

Typical Performance Characteristics Open Loop Frequency Response, 2.6V Power Derating Curves Power Dissipation vs Output Power (Continued) 20019894 20019869 =3V 200198B6 9 Noise Floor, 5V, 8Ω 80kHz Bandwidth, Input to GND 20019895 Power Dissipation vs Output Power, V ...

Page 10

Typical Performance Characteristics Shutdown Hysteresis Voltage 5V, SD Mode = V DD Shutdown Hysteresis Voltage 3V, SD Mode = V DD Shutdown Hysteresis Voltage 2.6V, SD Mode = V www.national.com (Continued) (High) 200198A0 (High) 200198A2 (High) DD 200198A4 10 Shutdown ...

Page 11

Typical Performance Characteristics Output Power vs. Supply Voltage, 4Ω Output Power vs Supply Voltage, 16Ω Frequency Response vs Input Capacitor Size (Continued) Output Power vs Supply Voltage, 8Ω 200198B8 Output Power vs Supply Voltage, 32Ω 200198A7 20019854 11 200198A6 200198A8 ...

Page 12

Application Information BRIDGE CONFIGURATION EXPLANATION As shown in Figure 1, the LM4901 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 13

Application Information external component combinations, consideration to compo- nent values must be used to maximize overall system qual- ity. The LM4901 is unity-gain stable which gives the designer maximum system flexibility. The LM4901 should be used in low gain configurations ...

Page 14

Application Information The LM4901 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 15

Application Information FIGURE 3. DIFFERENTIAL AMPLIFIER CONFIGURATION FOR LM4901 FIGURE 4. REFERENCE DESIGN BOARD SCHEMATIC (Continued) 15 20019829 20019825 www.national.com ...

Page 16

Application Information LM4901 MSOP DEMO BOARD ARTWORK Silk Screen Bottom Layer www.national.com (Continued) 20019875 20019877 16 Top Layer 20019879 ...

Page 17

Application Information LM4901 LLP DEMO BOARD ARTWORK Composite View Top Layer (Continued) 200198A9 200198B1 17 Silk Screen 200198B0 Bottom Layer 200198B2 www.national.com ...

Page 18

Application Information Part Description LM4901 Audio AMP Tantalum Capcitor, 1µF Ceramic Capacitor, 0.39µF Resistor, 20kΩ, 1/10W Resistor, 100kΩ, 1/10W Jumper Header Vertical Mount 2X1 0.100“ spacing PCB LAYOUT GUIDELINES This section provides practical guidelines for mixed signal PCB layout that ...

Page 19

Revision History Rev Date 1.0 12/10/02 Re-released the D/S to the WEB. Edited LLP Markings (LM4901 to L4901). 1.1 7/25/06 Removed all references to IBL (micro SMD) package per Troy, then re-released the D/S to the WEB. Description 19 www.national.com ...

Page 20

Physical Dimensions www.national.com inches (millimeters) unless otherwise noted MSOP Order Number LM4901MM NS Package Number MUB10A LLP Order Number LM4901LD NS Package Number LDA10B 20 ...

Page 21

... BANNED SUBSTANCE COMPLIANCE National Semiconductor follows the provisions of the Product Stewardship Guide for Customers (CSP-9-111C2) and Banned Substances and Materials of Interest Specification (CSP-9-111S2) for regulatory environmental compliance. Details may be found at: www.national.com/quality/green. ...

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