LM48410SQ/NOPB National Semiconductor, LM48410SQ/NOPB Datasheet

IC AMP AUDIO PWR 2.3W STER 24LLP

LM48410SQ/NOPB

Manufacturer Part Number
LM48410SQ/NOPB
Description
IC AMP AUDIO PWR 2.3W STER 24LLP
Manufacturer
National Semiconductor
Series
Boomer®r
Type
Class Dr
Datasheet
1.LM48410SQNOPB.pdf (20 pages)

Specifications of LM48410SQ/NOPB

Output Type
2-Channel (Stereo)
Max Output Power X Channels @ Load
2.3W x 2 @ 4 Ohm
Voltage - Supply
2.4 V ~ 5.5 V
Features
3D, Depop, Differential Inputs, PWM, Short-Circuit Protection, Shutdown
Mounting Type
Surface Mount
Package / Case
24-LLP
Operational Class
Class-D
Audio Amplifier Output Configuration
2-Channel Stereo
Output Power (typ)
2.3x2@4OhmW
Audio Amplifier Function
Speaker
Single Supply Voltage (typ)
Not RequiredV
Dual Supply Voltage (typ)
5V
Power Supply Requirement
Dual
Rail/rail I/o Type
No
Power Supply Rejection Ratio
70dB
Single Supply Voltage (min)
Not RequiredV
Single Supply Voltage (max)
Not RequiredV
Dual Supply Voltage (min)
2.4V
Dual Supply Voltage (max)
5.5V
Operating Temp Range
-40C to 85C
Operating Temperature Classification
Industrial
Mounting
Surface Mount
Pin Count
24
Package Type
LLP EP
Amplifier Class
D
No. Of Channels
2
Output Power
2.3W
Supply Voltage Range
2.4V To 5.5V
Load Impedance
4ohm
Operating Temperature Range
-40°C To +85°C
Amplifier Case Style
LLP
Rohs Compliant
Yes
For Use With
LM48410SQBD - BOARD EVALUATION FOR LM48410SQ
Lead Free Status / RoHS Status
Lead free / RoHS Compliant
Other names
LM48410SQTR

Available stocks

Company
Part Number
Manufacturer
Quantity
Price
Company:
Bonase Electronics (HK) Co., Limited Bonase Electronics (HK) Co., Limited
Part Number:
LM48410SQ/NOPB
Manufacturer:
NS
Quantity:
133
© 2008 National Semiconductor Corporation
LM48410
Low EMI, Filterless, 2.3W Stereo Class D Audio Power
Amplifier with National 3D Enhancement
General Description
The LM48410 is a single supply, high efficiency, 2.3W/chan-
nel, filterless switching audio amplifier. A low noise PWM
architecture eliminates the output filter, reducing external
component count, board area consumption, system cost, and
simplifying design. A selectable spread spectrum modulation
scheme suppresses RF emissions, further reducing the need
for output filters.
The LM48410 is designed to meet the demands of mobile
phones and other portable communication devices. Operat-
ing from a single 5V supply, the device is capable of delivering
2.3W/channel of continuous output power to a 4Ω load with
less than 10% THD+N. Flexible power supply requirements
allow operation from 2.4V to 5.5V. The LM48410 offers two
logic selectable modulation schemes, fixed frequency mode,
and an EMI reducing spread spectrum mode.
The LM48410 features high efficiency compared with con-
ventional Class AB amplifiers. When driving an 8Ω speaker
from a 3.6V supply, the device operates with 85% efficiency
at P
through the G0 and G1 pins. The LM48410 also includes
National’s 3D audio enhancement that improves stereo
sound quality. In devices where the left and right speakers are
in close proximity, 3D enhancement affects channel special-
ization, widening the perceived soundstage.
Output short circuit protection prevents the device from being
damaged during fault conditions. Superior click and pop sup-
pression eliminates audible transients on power-up/down and
during shutdown. Independent left/right shutdown controls
maximizes power savings in mixed mono/stereo applications.
EMI Plot
Boomer® is a registered trademark of National Semiconductor Corporation.
O
= 500mW/Ch. Four gain options are pin selectable
 
300106
Key Specifications
Features
■
■
■
■
■
■
■
■
■
■
■
Applications
■
■
■
■ 
■ 
■ 
■ 
■ 
■ 
■ 
Selectable spread spectrum mode reduces EMI
Output Short Circuit Protection
Stereo Class D operation
No output filter required
National 3D Enhancement
Logic selectable gain
Independent channel shutdown controls
Minimum external components
Click and Pop suppression
Micro-power shutdown
Available in space-saving 4mm x 4mm LLP package
Mobile phones
PDAs
Laptops
Quiescent Power Supply Current
at 3.6V supply
Power Output at V
R
Power Output at V
R
Shutdown current
Efficiency at 3.6V, 100mW into 8Ω
Efficiency at 3.6V, 500mW into 8Ω
Efficiency at 5V, 1W into 8Ω
L
L
= 4Ω, THD
= 8Ω, THD
≤
≤
10%
10%
DD
DD
= 5V,
= 5V,
300106a0
www.national.com
0.03μA (typ)
July 3, 2008
2.3W (typ)
1.5W (typ)
80% (typ)
85% (typ)
86% (typ)
4mA

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LM48410SQ/NOPB Summary of contents

Page 1

... Superior click and pop sup- pression eliminates audible transients on power-up/down and during shutdown. Independent left/right shutdown controls maximizes power savings in mixed mono/stereo applications. EMI Plot Boomer® registered trademark of National Semiconductor Corporation. © 2008 National Semiconductor Corporation Key Specifications ■  Quiescent Power Supply Current at 3.6V supply ■ ...

Page 2

Typical Application www.national.com FIGURE 1. Typical Audio Amplifier Application Circuit 2 30010686 ...

Page 3

Connection Diagrams LLP Package 4mm x 4mm x 0.8mm Top View Order Number LM48410SQ See NS Package Number SQA24A LM48410SQ Markings 30010699 Top View U = Wafer Fab Code Z = Assembly Plant Digit Date Code TT ...

Page 4

Pin Descriptions Pin 10 13 www.national.com Name Right Channel non-inverting 3D connection. Connect to 3DL+ through 3DR+ C ...

Page 5

... 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 1) Storage Temperature Input Voltage Power Dissipation (Note 3) ESD Susceptibility(Note 4) ESD Susceptibility (Note 5) Electrical Characteristics V = 15μH + 8Ω + 15μH, SS/ ...

Page 6

Symbol Parameter P Output Power (Per Channel) O THD+N Total Harmonic Distortion PSRR Power Supply Rejection Ratio CMRR Common Mode Rejection Ratio η Efficiency Xtalk Crosstalk SNR Signal to Noise Ratio ε Output Noise OS www.national.com Conditions ≤ = 15μH ...

Page 7

Note 1: All voltages are measured with respect to the ground pin, unless otherwise specified. Note 2: Absolute Maximum Ratings indicate limits beyond which damage to the device may occur. Operating Ratings indicate conditions for which the device is functional, ...

Page 8

THD+N vs Frequency 375mW OUT THD+N vs Frequency V = 3.6V 250mW OUT Efficiency vs Output Power = 4Ω 1kHz R L www.national.com = 8Ω ...

Page 9

Power Dissipation vs Output Power = 4Ω 1kHz R L Output Power vs Supply Voltage = 4Ω 1kHz R L PSRR vs Frequency = 8Ω 3.6V 200mV , R DD RIPPLE P-P ...

Page 10

CMRR vs Frequency V = 3.6V Fixed Frequency FFT V = 3.6V DD www.national.com = 8Ω P-P L 30010696 30010697 10 Supply Current vs Supply Voltage No Load 30010684 Spread Spectrum FFT V ...

Page 11

Application Information GENERAL AMPLIFIER FUNCTION The LM48410 stereo Class D audio power amplifier features a filterless modulation scheme that reduces external compo- nent count, conserving board space and reducing system cost. The outputs of the device transition from V with ...

Page 12

RC networks, one for each stereo input pair (INL+ and INR+, and INL- and INR-). Set 3DEN high to enable the 3D effect. Set 3DEN low to disable the 3D effect. The 3D RC network ...

Page 13

PCB LAYOUT GUIDELINES As output power increases, interconnect resistance (PCB traces and wires) between the amplifier, load and power sup- ply create a voltage drop. The voltage loss due to the traces between the LM48410 and the load results in ...

Page 14

Bill of Materials Designation Qty C1–C4 4 C5–C9 5 C10 JU1–JU6 6 U1 www.national.com TABLE 2. LM48410SQ Demo Board Bill of Materials Recommended Description Manufacturer 1μF±10%, 16V X7R ceramic Panasonic ...

Page 15

LM48410 Demonstration Board Schematic Diagram 15 www.national.com ...

Page 16

Demoboard PCB Layout Top Silkscreen Top Layer www.national.com 30010654 Top Soldermask 30010653 Layer 2 16 30010655 30010651 ...

Page 17

Layer 3 30010650 Bottom Silkscreen Bottom Layer 17 30010649 www.national.com ...

Page 18

Revision Table Rev Date 1.0 02/21/07 1.1 03/19/07 1.2 07/11/07 1.3 02/22/08 1.4 04/29/08 1.5 07/03/08 www.national.com Description Initial release. Text edits. Added the demo boards and schematic diagram. Fixed the PID (product folder). Text edits. Text edits (under SHUTDOWN ...

Page 19

Physical Dimensions inches (millimeters) unless otherwise noted LLP Package Order Number LM48410SQ NS Package Number SQA24A 19 www.national.com ...

Page 20

... For more National Semiconductor product information and proven design tools, visit the following Web sites at: Products Amplifiers www.national.com/amplifiers Audio www.national.com/audio Clock Conditioners www.national.com/timing Data Converters www.national.com/adc Displays www.national.com/displays Ethernet www.national.com/ethernet Interface www.national.com/interface LVDS www.national.com/lvds Power Management www.national.com/power Switching Regulators www.national.com/switchers LDOs www ...

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