Maxim > Products > Audio > MAX9744

MAX9744

20W Stereo Class D Speaker Amplifier with Volume Control

Delivers 2 x 20W from 12V Supply into 4Ω Loads

Overview

Technical Documents

Ordering Info

Status

Active: In Production.

Description

The MAX9744 20W 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. This device features single-supply operation, adjustable gain, shutdown mode, a SYNC output, speaker mute, and industry-leading click-and-pop suppression.

The MAX9744 features a 64-step dual-mode (analog or digital), programmable volume control and mute function. The MAX9744 operates from a 4.5V to 14V single supply and can deliver up to 20W per channel into a 4Ω speaker with a 14V supply.

The MAX9744 offers two modulation schemes: a fixed-frequency modulation mode that allows one of several preset switching frequencies to be selected, and a spread-spectrum modulation mode that helps to reduce EMI-radiated emissions.

The MAX9744 features high 75dB PSRR, low 0.04% THD+N, and SNR in excess of 90dB. Robust short-circuit and thermal-overload protection prevent device damage during a fault condition. The MAX9744 is available in a 44-pin thin QFN-EP (7mm x 7mm x 0.8mm) package and is specified over the extended -40°C to +85°C temperature range.

Data Sheet

Download	Rev 1	(PDF, 604kB)
E-Mail

An evaluation kit is available: MAX9744EVCMAXQU, MAX9744EVKIT

Key Features

Wide 4.5V to 14V Power-Supply Voltage Range
Filterless Spread-Spectrum Modulation Lowers Radiated RF Emissions from Speaker Cables
20W Stereo Output (4Ω, V_DD = 12V, THD+N = 10%)
Integrated Volume Control (I²C or Analog)
Low 0.04% THD+N
High 75dB PSRR
High 93% Efficiency
Integrated Click-and-Pop Suppression
Low-Power Shutdown Mode
Short-Circuit and Thermal-Overload Protection
Available in a 44-Pin Thin QFN-EP (7mm x 7mm x 0.8mm)

Applications/Uses

Flat-Panel Televisions
Multimedia Docking Stations
PC Speaker Systems

Key Specifications:

Speaker Amplifiers

Part Number

Class

Spkr. Amp. V_CC
(V)

P_OUT into 4Ω @ 10% THD+N
(W)

Spkr. Amp. Half Pwr. THD+N
(%)

SNR
(dB)

PSRR
(dB)

Spkr. Amp. Ext. Gain

Channels

Budgetary Price

min

max

min

A- Weighted

min

See Notes

MAX9744

4.5

0.04

Yes

$1.70 @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

Simplified Block Diagram

Application Notes

Application Note 3878		Reduce EMI from Class D Amplifiers Using New Modulation Techniques and Filter Architectures
Application Note 3879		Thermal Considerations for a Class D Amplifier
Application Note 3977		Class D Amplifiers: Fundamentals of Operation and Recent Developments
Application Note 4046		Overview of 2.1 (Satellite/Subwoofer) Speaker Systems
Application Note 4628		TV Audio Amplifiers—Thermal Test Considerations for Slim Systems

Product Guides

Audio (PDF)

Reliability Reports

Reliability Report:	MAX9744.pdf
Show FIT data for:

Software/Models

none

Ordering Information

Filters:

Part Number:

Package:

Temperature:

Tape and Reel

Sample

Part Number	Free Sample	Buy	Status	Package: TYPE PINS FOOTPRINT DRAWING CODE/VAR *	Temp	RoHS/Lead-Free? Materials Analysis
MAX9744ETH+			Active	TQFN;44 pin;50.4 mm² Outline Drawing:21-0144 (PDF) Land Pattern: 90-0127 (PDF) Use pkgcode/variation: T4477+2*	-40°C to +85°C	RoHS/Lead-Free: Lead Free Materials Analysis
MAX9744ETH+T			Active	TQFN;44 pin;50.4 mm² Outline Drawing:21-0144 (PDF) Land Pattern: 90-0127 (PDF) Use pkgcode/variation: T4477+2*	-40°C to +85°C	RoHS/Lead-Free: Lead Free Materials Analysis

Notes:

Other options and links for purchasing parts are listed at: http://www.maxim-ic.com/sales.
Didn't Find What You Need? Ask our applications engineers. Expert assistance in finding parts, usually within one business day.
Part number suffixes: T or T&R = tape and reel; + = RoHS/lead-free; # = RoHS/lead-exempt; -D = drypack; -U/+U on DS parts = cut tape. More: See Full Data Sheet or Maxim Product Naming Conventions.
* Some packages have variations, listed on the drawing. "PkgCode/Variation" tells which variation the product uses. Note that "+", "#", "-" in the part number suffix describes RoHS status. Package drawings may show a different suffix character.

Similar Products by Function

See All Speaker Amplifiers (44 Products)

Similar Products by Application

MP3 Docking Stations: Mid Level > Class D Speaker Amplifiers

Evaluation Kits

MAX9744EVCMAXQU, MAX9744EVKIT

Evaluation Kit/Evaluation System for the MAX9744

Products with Similar Part Numbers