LM48411TL NSC [National Semiconductor], LM48411TL Datasheet

LM48411TL

Manufacturer Part Number

LM48411TL

Description

Ultra-Low EMI, Filterless, 2.5W, Stereo, Class D Audio Power Amplifier with E2S

Manufacturer

NSC [National Semiconductor]

Datasheet

1.LM48411TL.pdf (18 pages)

Available stocks

Company

Part Number

Manufacturer

Quantity

Price

Company:

Meier Automation Equipment Co., Limited

Part Number:

LM48411TLX

Manufacturer:

NS/国半

Quantity:

20 000

Current page: 1 of 18
Download datasheet (408Kb)

LM48411

Ultra-Low EMI, Filterless, 2.5W, Stereo, Class D Audio

Power Amplifier with E

General Description

The LM48411 is a single supply, high efficiency, 2.5W/chan-

nel Class D audio amplifier. The LM48411 features National's

Enhanced Emissions Suppression (E

tures a unique patent-pending ultra low EMI, spread spec-

trum, PWM architecture, that significantly reduces RF emis-

sions while preserving audio quality and efficiency. The E

system improves battery life, reduces external component

count, board area consumption, system cost, and simplifying

design.

The LM48411 is designed to meet the demands of mobile

phones and other portable communication devices. Operat-

ing on a single 5V supply, it is capable of delivering 2.5W/

channel of continuous output power to a 4Ω load with less

than 10% THD+N. Its flexible power supply requirements al-

low operation from 2.4V to 5.5V. The wide band spread

spectrum architecture of the LM48411 reduces EMI-radiated

emissions due to the modulator frequency.

The LM48411 features high efficiency compared to a con-

ventional Class AB amplifier. The E

advanced, patent-pending edge rate control (ERC) architec-

ture that further reduce emissions by minimizing the high

frequency component of the device output, while maintaining

high quality audio reproduction and high efficiency (η = 87%

at V

lectable through GAIN0 and GAIN1 pins.

The LM48411 features a low-power consumption shutdown

mode. Shutdown may be enabled by driving the Shutdown

pin to a logic low (GND).

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 control

maximizes power savings in mixed mono/stereo applications.

Boomer® is a registered trademark of National Semiconductor Corporation.

= 3.6V, P

= 500mW). Four gain options are pin se-

S system includes an

S) system, that fea-

300095

Key Specifications

Features

■

Applications

■

Efficiency

Output short circuit protection

Stereo Class D Operation

No output filter required for inductive loads

Logic selectable gain

Independent shutdown control

Minimum external components

"Click and pop" suppression circuitry

Micro-power shutdown mode

Available in space-saving 0.5mm pitch micro SMD

package

Mobile phones

PDAs

Portable electronic devices

Efficiency at 3.6V, 500mW into 8Ω

Efficiency at 3.6V, 100mW into 8Ω

Efficiency at 5V, 1W into 8Ω

Quiescent current, 3.6V supply

Power Output at V

Total shutdown power supply

Single supply range

speaker

S system reduces EMI preserving Audio Quality and

speaker

current

= 4Ω, THD

= 8Ω, THD

≤

10%

= 5V

www.national.com

October 2007

0.01µA (typ)

2.4V to 5.5V

4.2mA (typ)

2.5W (typ)

1.5W (typ)

87% (typ)

80% (typ)

88% (typ)

Related parts for LM48411TL

LM48411TL Summary of contents

Page 1

LM48411 Ultra-Low EMI, Filterless, 2.5W, Stereo, Class D Audio Power Amplifier with E General Description The LM48411 is a single supply, high efficiency, 2.5W/chan- nel Class D audio amplifier. The LM48411 features National's Enhanced Emissions Suppression (E tures a ...

Page 2

LM48411 Rf Emissions www.national.com 30009586 2 ...

Page 3

Typical Application FIGURE 1. Typical Audio Amplifier Application Circuit 3 30009501 www.national.com ...

Page 4

... www.national.com micro SMD Marking Top View X — Date Code T— Die Traceability G — Boomer Family J2 — LM48411TL 30009502 Name OUTLB Left Channel output B OUTLA Left Channel output A PV Power INL+ Non-inverting left channel input SDL Left channel active low shutodwn ...

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 Voltage at Any Input Pin V + 0.3V DD Power Dissipation (Note 3) ...

Page 6

Symbol Parameter P Output Power O P Output Power O THD+N Total Harmonic Distortion + Noise Power Supply Rejection Ratio PSRR (Input Referred) SNR Signal to Noise Ratio Output Noise ε (Input Referred) OUT Common Mode Rejection Ratio CMRR (Input ...

Page 7

Note 1: “Absolute Maximum Ratings” indicate limits beyond which damage to the device may occur, including inoperability and degradation of device reliability and/or performance. Functional operation of the device and/or non-degradation at the Absolute Absolute Maximum Ratings or other conditions ...

Page 8

THD+N vs Frequency = 4Ω 3.6V 250mW/channel THD+N vs Output Power = 8Ω 2.5V THD+N vs Output Power = 8Ω 3.6V ...

Page 9

THD+N vs Output Power = 8Ω 5V 6dB 30009582 THD+N vs Output Power = 4Ω 2.5V 6dB 30009572 THD+N vs Output Power = 4Ω, ...

Page 10

THD+N vs Output Power = 4Ω 5.0V PSRR vs Frequency V = 3.6V Quiescent Current vs Power Supply ∞ www.national.com = 6dB V 30009580 = 8Ω L 30009568 30009542 ...

Page 11

Output Power vs Supply Voltage = 8Ω 1kHz R L 30009562 Efficiency vs Output Power = 8Ω 30009570 Power Dissipation vs Output Power = 4Ω 30009566 Efficiency vs Output Power = 4Ω ...

Page 12

External Components Description (Figure 1) Components 1. C Supply bypass capacitor which provides power supply filtering. Refer to the Power Supply Bypassing section S for information concerning proper placement and selection of the supply bypass capacitor Input AC ...

Page 13

Application Information GENERAL AMPLIFIER FUNCTION The LM48411 features a filterless modulation scheme. The differential outputs of the device switch at 300kHz from V to GND. When there is no input signal applied, the two outputs (V 1 and V 2) ...

Page 14

These capacitors do not eliminate the need for bypassing on the supply pin of the LM48411. A 4.7µF tantalum capacitor is recommended. SHUTDOWN FUNCTION In order to reduce power consumption while not in use, the ...

Page 15

Revision History Rev Date 1.0 09/21/07 1.1 10/01/07 Description Initial release. Fixed few typos. 15 www.national.com ...

Page 16

... Physical Dimensions www.national.com inches (millimeters) unless otherwise noted 16 Bump micro SMD Order Number LM48411TL NS Package Number TLA16ACA X1 = 1.996mm X2 = 2.047mm X3 = 0.6mm 16 ...

Page 17

Notes 17 www.national.com ...

Page 18

THE CONTENTS OF THIS DOCUMENT ARE PROVIDED IN CONNECTION WITH NATIONAL SEMICONDUCTOR CORPORATION (“NATIONAL”) PRODUCTS. NATIONAL MAKES NO REPRESENTATIONS OR WARRANTIES WITH RESPECT TO THE ACCURACY OR COMPLETENESS OF THE CONTENTS OF THIS PUBLICATION AND RESERVES THE RIGHT TO MAKE ...

Related keywords

LM48411TL datasheet
LM48411TL data sheet
LM48411TL pdf datasheet
LM48411TL component
LM48411TL part
LM48411TL distributor
LM48411TL RoHS
LM48411TL datasheet download