Maxim > Products > Audio > MAX9741

MAX9741

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

Overview

Technical Documents

Ordering Info

Status

Active: In Production.

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 Class D architecture, the MAX9741 delivers 12W continuous output power into 8Ω loads. Modulation and switching schemes render the traditional Class D EMI suppression output filter unnecessary.

The MAX9741 offers two modulation schemes: a fixed-frequency mode (FFM), and a spread-spectrum mode (SSM) that reduces EMI-radiated emissions due to the modulation frequency. 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 0.07% 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.

Data Sheet

Download	Rev 0	(PDF, 1.1MB)
E-Mail

An evaluation kit is available: MAX9741EVKIT

Key Features

Low EMI
Unique Spread-Spectrum Mode Offers 5dB Emissions Improvement Over Conventional Methods
Up to 88% Efficient into 16Ω
12W+12W Continuous Output Power into 8Ω
15W+15W Continuous Output Power into 16Ω
Low 0.07% 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
Low Quiescent Current (24mA)
Low-Power Shutdown Mode (0.2µA)
Short-Circuit and Thermal-Overload Protection
Available in Thermally Efficient, Space-Saving 56-Pin TQFN (8mm x 8mm x 0.8mm) Package

Applications/Uses

Automotive
Desktop PCs
LCD Monitors
LCD Projectors
LCD TVs

Key Specifications:

Speaker Amplifiers

Part Number

Class

Spkr. Amp. V_CC
(V)

Spkr. Amp. I_CC
(mA)

P_OUT into 4Ω @ 10% THD+N
(W)

P_OUT into 8Ω @ 10% THD+N
(W)

PSRR
(dB)

Spkr. Amp. Ext. Gain

Spkr. Amp. Fxd. Gain
(V/V)

Channels

Budgetary Price

min

max

typ

min

max

See Notes

MAX9741

8.5

4.5

30.2

$2.50 @1k

See All Speaker Amplifiers (41)

Pricing Notes:
This pricing is BUDGETARY, for comparing similar parts. Prices are in U.S. dollars and subject to change. Quantity pricing may vary substantially and international prices may differ due to local duties, taxes, fees, and exchange rates. For volume-specific prices and delivery, please see the price and availability page or contact an authorized distributor.

Diagram

Simplilfied Block Diagram

More Information

New Product Press Release

[ 2005-11-11 ]

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Information Index

Overview		Technical Documents		Ordering Info		Related Products
Description Key Features Applications/Uses Key Specifications Diagram Notes and Comments		Data Sheet Application Notes Evaluation Kits Product Guides Reliability Reports Software/Models		Price and Availability Samples Buy Online Package Information Lead-Free Information		Similar Products by Function Similar Products by Application Evaluation Kits Products with Similar Part Numbers Products Used With This

Document Ref.: 19-3887 Rev 0; 2006-02-24
This page last modified: 2010-05-04