MAX9741 View Datasheet(PDF) - Maxim Integrated

Part Name

Description

Manufacturer

MAX9741

12W+12W, Low-EMI, Spread-Spectrum, Stereo, Class D Amplifier

Maxim Integrated 

19-3887; Rev 0; 2/06

EVAALVUAAILTAIOBNLEKIT

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

Stereo, Class D Amplifier

General Description

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.

LCD/PDP TVs

CRT TVs

PC Speakers

Applications

Features

♦ Low-EMI Class D Amplifier

♦ Spread-Spectrum Mode Reduces EMI

♦ Passes FCC EMI Limits with Ferrite Bead Filters

with 0.5m Cables

♦ 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

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

Ordering Information

PART

TEMP RANGE

MAX9741ETN+ -40°C to +85°C

+Denotes lead-free package.

*EP = Exposed paddle.

PIN-PACKAGE

56 TQFN-EP*

PKG

CODE

T5688-3

Simplified Block Diagram

INR+

DIFFERENTIAL AUDIO INR-

INPUTS ELIMINATE

NOISE PICKUP INL+

INL-

PROGRAMMABLE

SWITCHING

FREQUENCY

G1

G2

FS1, FS2

GAIN

CONTROL

CLASS D

MODULATOR

OUTPUT

PROTECTION

2

MAX9741

CLASS D

AMPLIFIERS

DRIVE 2 X 12W

INTO 8Ω LOADS

Pin Configuration appears at end of data sheet.

________________________________________________________________ Maxim Integrated Products 1

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.

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