MAX9741ETN+D Maxim Integrated Products, MAX9741ETN+D Datasheet

MAX9741ETN+D

Manufacturer Part Number

MAX9741ETN+D

Description

IC AMP AUDIO PWR 12W STER 56TQFN

Manufacturer

Maxim Integrated Products

Type

Class Dr

Datasheet

1.MAX9741ETNTD.pdf (16 pages)

Specifications of MAX9741ETN+D

Output Type

2-Channel (Stereo)

Max Output Power X Channels @ Load

12W x 2 @ 8 Ohm

Voltage - Supply

10 V ~ 25 V

Features

Depop, Differential Inputs, Mute, Short-Circuit and Thermal Protection, Shutdown

Mounting Type

Surface Mount

Package / Case

56-TQFN

Lead Free Status / RoHS Status

Lead free / RoHS Compliant

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The MAX9741 stereo Class D audio power amplifier

provides Class AB amplifier performance with Class D

efficiency, conserving board space and eliminating the

need for a bulky heatsink. Using a high-efficiency Class

D architecture, it delivers 12W continuous output power

into 8Ω loads. Proprietary modulation and switching

schemes render the traditional Class D EMI suppression

output filter unnecessary.

The MAX9741 offers two modulation schemes: a fixed-fre-

quency mode (FFM), and a spread-spectrum mode (SSM)

that reduces EMI-radiated emissions. The device utilizes a

fully differential architecture, a full bridged output, and

offers comprehensive click-and-pop suppression.

The MAX9741 features high 80dB PSRR, low 0.1%

THD+N, and SNR in excess of 100dB. Short-circuit and

thermal-overload protection prevent the device from

being damaged during a fault condition. The MAX9741

is available in a 56-pin TQFN (8mm x 8mm x 0.8mm)

package. The MAX9741 is specified over the extended

-40°C to +85°C temperature range.

19-3887; Rev 0; 2/06

Pin Configuration appears at end of data sheet.

For pricing, delivery, and ordering information, please contact Maxim/Dallas Direct! at

1-888-629-4642, or visit Maxim’s website at www.maxim-ic.com.

DIFFERENTIAL AUDIO

INPUTS ELIMINATE

LCD/PDP TVs

CRT TVs

PC Speakers

PROGRAMMABLE

NOISE PICKUP

FREQUENCY

SWITCHING

INR+

INR-

INL+

INL-

________________________________________________________________ Maxim Integrated Products

12W+12W, Low-EMI, Spread-Spectrum,

General Description

FS1, FS2

Applications

CONTROL

GAIN

Stereo, Class D Amplifier

MODULATOR

CLASS D

♦ Low-EMI Class D Amplifier

♦ Spread-Spectrum Mode Reduces EMI

♦ Passes FCC EMI Limits with Ferrite Bead Filters

♦ 12W+12W Continuous Output Power into 8Ω

♦ Low 0.1% THD+N

♦ High PSRR (80dB at 1kHz)

♦ 10V to 25V Single-Supply Operation

♦ Differential Inputs Minimize Common-Mode Noise

♦ Pin-Selectable Gain Reduces Component Count

♦ Industry-Leading Click-and-Pop Suppression

♦ Short-Circuit and Thermal-Overload Protection

♦ Available in Thermally Efficient, Space-Saving

+Denotes lead-free package.

*EP = Exposed paddle.

MAX9741ETN+

with 0.5m Cables

56-Pin TQFN (8mm x 8mm x 0.8mm) Package

PART

PROTECTION

MAX9741

OUTPUT

Simplified Block Diagram

-40°C to +85°C

TEMP RANGE

Ordering Information

PIN-PACKAGE

56 TQFN-EP*

Features

CLASS D

AMPLIFIERS

DRIVE 2 X 12W

INTO 8Ω LOADS

T5688-3

CODE

PKG

Related parts for MAX9741ETN+D

MAX9741ETN+D Summary of contents

Page 1

... PROGRAMMABLE SWITCHING FS1, FS2 FREQUENCY Pin Configuration appears at end of data sheet. ________________________________________________________________ Maxim Integrated Products For pricing, delivery, and ordering information, please contact Maxim/Dallas Direct! at 1-888-629-4642, or visit Maxim’s website at www.maxim-ic.com. Stereo, Class D Amplifier ♦ Low-EMI Class D Amplifier ♦ Spread-Spectrum Mode Reduces EMI ♦ ...

Page 2

Low-EMI, Spread-Spectrum, Stereo, Class D Amplifier ABSOLUTE MAXIMUM RATINGS (All voltages referenced to GND PGND, AGND .............................................................30V DD OUTR_, OUTL_, C1N..................................-0. C1P............................................(V - 0.3V) to (CHOLD + 0.3V) DD CHOLD ........................................................(V SHDN, FS_, G_ ...........................................................-6.3V ...

Page 3

Low-EMI, Spread-Spectrum, ELECTRICAL CHARACTERISTICS (continued) = 18V, GND = PGND = 0V, SHDN ≥ GND (f = 670kHz), R connected between OUTL+ and OUTL- and OUTR+ and OUTR Typical values are at T ...

Page 4

Low-EMI, Spread-Spectrum, Stereo, Class D Amplifier (V = 18V 8Ω 1kHz, 33µH with 4Ω, 68µH with 8Ω, part in SSM mode, 136µH with 16Ω, measurement BW = 22Hz 22kHz, unless otherwise ...

Page 5

Low-EMI, Spread-Spectrum 18V 8Ω 1kHz, 33µH with 4Ω, 68µH with 8Ω, part in SSM mode, 136µH with 16Ω, measurement BW = 22Hz 22kHz, unless otherwise noted.) POWER-SUPPLY REJECTION RATIO ...

Page 6

Low-EMI, Spread-Spectrum, Stereo, Class D Amplifier (V = 18V 8Ω 1kHz, 33µH with 4Ω, 68µH with 8Ω, part in SSM mode, 136µH with 16Ω, measurement BW = 22Hz 22kHz, unless otherwise ...

Page 7

Low-EMI, Spread-Spectrum, PIN NAME 11–15, 19, 21, 23, 25, 28, 33–36, 39, N.C. 42, 43, 44, 49, 50, 55 40, 41 PGND C1N 9 C1P 10 ...

Page 8

Low-EMI, Spread-Spectrum, Stereo, Class D Amplifier Operating Modes Fixed-Frequency Modulation (FFM) Mode The MAX9741 features three FFM modes with different switching frequencies (Table 1). In FFM mode, the fre- quency spectrum of the Class D output consists of the ...

Page 9

Low-EMI, Spread-Spectrum, Internal Regulator The MAX9741 has an internal linear regulator, REG, used to power the internal analog circuitry. The voltage at REG is nominally 6V. Bypass REG to AGND with a 10nF capacitor, rated for at least 10V. ...

Page 10

Low-EMI, Spread-Spectrum, Stereo, Class D Amplifier Ferrite beads are available from many manufacturers. Table 3 lists some manufacturers who make ferrite beads and other products suitable for use with Class D amplifiers. Although they offer a low cost and ...

Page 11

Low-EMI, Spread-Spectrum, The MAX9741 can be configured as single-ended input amplifiers by capacitively coupling either input to GND and driving the other input (Figure Component Selection An input capacitor conjunction with the input IN impedance of ...

Page 12

Low-EMI, Spread-Spectrum, Stereo, Class D Amplifier Audio content, both music and voice, has a much lower RMS value relative to its peak output power. shows a sine wave and an audio signal in the time domain. Both are measured ...

Page 13

Low-EMI, Spread-Spectrum, 33µF 25V 2.2µF 25V PGND V DD 0.47µF 17 INL+ MODULATOR 0.47µF 16 INL- 31 FS1 V REG OSCILLATOR 32 FS2 V REG 0.47µF INR+ 27 MODULATOR 0.47µF INR SHDN V IH ...

Page 14

Low-EMI, Spread-Spectrum, Stereo, Class D Amplifier TOP VIEW N.C. 43 N.C. 44 OUTR- 45 OUTR- 46 OUTR+ 47 OUTR+ 48 N.C. 49 N.C. 50 OUTL- 51 OUTL- 52 OUTL+ 53 OUTL+ 54 N. ______________________________________________________________________________________ 42 ...

Page 15

Low-EMI, Spread-Spectrum, (The package drawing(s) in this data sheet may not reflect the most current specifications. For the latest package outline information www.maxim-ic.com/packages.) ______________________________________________________________________________________ Stereo, Class D Amplifier Package Information PACKAGE OUTLINE 56L THIN QFN, 8x8x0.8mm 1 ...

Page 16

... Maxim cannot assume responsibility for use of any circuitry other than circuitry entirely embodied in a Maxim product. No circuit patent licenses are implied. Maxim reserves the right to change the circuitry and specifications without notice at any time. 16 ____________________Maxim Integrated Products, 120 San Gabriel Drive, Sunnyvale, CA 94086 408-737-7600 © 2006 Maxim Integrated Products Quijano ...

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