LM48512TLX/NOPB National Semiconductor, LM48512TLX/NOPB Datasheet

LM48512TLX/NOPB

Manufacturer Part Number

LM48512TLX/NOPB

Description

IC AMP AUDIO PWR 1.8W D SMD

Manufacturer

National Semiconductor

Datasheet

1.LM48512TLNOPB.pdf (6 pages)

Specifications of LM48512TLX/NOPB

Lead Free Status / RoHS Status

Lead free / RoHS Compliant

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PowerWise® Boosted, Ultra Low-EMI, Mono, E

Audio Power Amplifier

General Description

Part of National’s PowerWise family or products, the

LM48512 delivers 1.8W into 8Ω, while consuming 14.5mA of

quiescent current. The LM48512 also features National’s En-

hanced Emissions Suppression (E

ultra low EMI PWM architecture that significantly reduces RF

emissions while preserving audio quality and efficiency.

LM48512 improves battery life, reduces external component

count, board area consumption, system cost, and simplifies

design.

The LM48512 is designed to meet the demands of portable

multimedia devices. The LM48512 features high efficiency

compared to other boosted amplifiers and low EMI Class D

amplifiers. The LM48512 is capable of driving an 8Ω speaker

to 5.5V levels (1.8W) from a 3.6V supply while operating at

82% efficiency. Flexible power supply requirements allow op-

eration from 2.3V to 5.5V. The E

ed edge rate control (ERC) architecture that further reduces

emissions by minimizing the high frequency component of the

device output, while maintaining high quality audio reproduc-

tion (THD+N = 0.03%) and high efficiency. A low power

shutdown mode reduces supply current consumption to

0.04μA.

The LM48512 features a boost converter that will detect the

battery voltage. The boost reduces the output voltage to the

amplifier as the battery voltage decreases.

Superior click and pop suppression eliminates audible tran-

sients on power-up/down and during shutdown.

Notice: This document is not a full datasheet. For more

information regarding this product or to order samples

please contact your local National Semiconductor sales

office or visit http://www.national.com/support/dir.html

Boomer® is a registered trademark of National Semiconductor Corporation.

S system features a patent-

S) system, a patented,

LM48512

301217

PRODUCT BRIEF

■

Key Specifications

Features

■

Applications

■

Efficiency at 3.6V, 800mW into 8Ω

Quiescent Power Supply Current

Power Output at V

Shutdown current

and Efficiency

Integrated Boost Converter

Supply Voltage Level Detection on Boost Converter

Low Power Shutdown Mode

"Click and Pop" suppression

Mobile phones

Smart phones

PDAs

at 3.6V

S System Reduces EMI while Preserving Audio Quality

= 8Ω, THD+N

≤

= 3.6V

S Class D

PRELIMINARY

October 4, 2010

www.national.com

0.04μA (typ)

1.8W (typ)

82% (typ)

14.5mA

Related parts for LM48512TLX/NOPB

LM48512TLX/NOPB Summary of contents

Page 1

... Notice: This document is not a full datasheet. For more information regarding this product or to order samples please contact your local National Semiconductor sales office or visit http://www.national.com/support/dir.html Boomer® registered trademark of National Semiconductor Corporation. © 2010 National Semiconductor Corporation LM48512 PRODUCT BRIEF ...

Page 2

Typical Application Connection Diagrams TL Package 2.352mm x 2.403mm x 0.6mm Top View Order Number LM48512TL See NS Package Number TLA16QSA www.national.com FIGURE 1. Typical Audio Amplifier Application Circuit 30121769 2 30121756 16 – Bump micro SMD Markings 30121760 Top ...

Page 3

Pin Descriptions PIN NAME PVOUT PGND B1 OUTA B2 GAIN R B3 TRIP OUTB C2, D1 PGND C3 SDAMP C4 GND D2 IN+ D3 IN- D4 SDREG TABLE 1. ...

Page 4

Physical Dimensions www.national.com inches (millimeters) unless otherwise noted micro SMD Order Number LM48512TL NS Package Number TLA16QSA X = 2.352mm 2.403mm 0.6mm 3 ...

Page 5

Notes 5 www.national.com ...

Page 6

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

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