MAX9744

更新时间： 2024-11-19 04:41:31

品牌	Logo	应用领域
美信 - MAXIM		放大器
页数	文件大小	规格书
1页	118K
描述
20W Stereo Class D Speaker Amplifier with Volume Control

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MAX9744 数据手册

XX-XXXX; Rev 0; 3/08

20W Stereo Class D Speaker Amplifier

with Volume Control

MAX974

General Description

Features

The MAX9744 20W stereo Class D audio power amplifi-

er provides Class AB amplifier performance with Class

D efficiency, conserving board space and eliminating

the need for a bulky heatsink. This device features sin-

gle-supply operation, adjustable gain, shutdown mode,

SYNC output, speaker mute, and industry-leading click-

and-pop suppression.

♦ 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

= 12V, THD+N = 10%)

♦ Integrated Volume Control (I C or Analog)

♦ Low 0.04% THD+N

The MAX9744 features a 64-step dual-mode (analog or

digital), programmable volume control and mute func-

tion. 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.

♦ High 75dB PSRR

♦ High 93% Efficiency (20W, 8Ω)

♦ 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)

The MAX9744 features high 75dB PSRR, low 0.04%

THD+N, and SNR in excess of 90dB. Robust short-cir-

cuit and thermal-overload protection prevent device

damage during a fault condition. The MAX9744 is avail-

able 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.

Ordering Information

PIN-

PACKAGE

PKG

CODE

PART

TEMP RANGE

MAX9744ETH+

-40°C to +85°C 44 TQFN-EP*

T4477-3

Applications

+Denotes a lead-free package.

*EP = Exposed paddle.

Flat-Panel Televisions

PC Speaker Systems

Multimedia Docking Stations

Pin Configuration appears at end of data sheet.

Simplified Block Diagram

3V TO 3.6V

4.5V TO 14V

MAX9744 EMI WITH FERRITE BEAD FILTERS

MAX9744

(V = 12V, 1m CABLE, 8Ω LOAD)

VOLUME

CONTROL

BIAS

OVER 20dB MARGIN

TO EN55022 B LIMIT

MUTE

SHUTDOWN

CONTROL

I C

ANALOG

CONTROL

SYNC

SYNCOUT

120 160 200 240 280

140 260 300

FREQUENCY (MHz)

OSCILLATOR

100

180

220

________________________________________________________________ Maxim Integrated Products

For pricing, delivery, and ordering information, please contact Maxim Direct at 1-888-629-4642,

or visit Maxim’s website at www.maxim-ic.com.

中文翻译

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与MAX9744相关器件

型号	品牌	获取价格	描述	数据表
MAX9744_V01	MAXIM	获取价格	20W Stereo Class D Speaker Amplifier with Volume Control
MAX9744ETH	MAXIM	获取价格	20W Stereo Class D Speaker Amplifier with Volume Control
MAX9744ETH+	MAXIM	获取价格	Volume Control Circuit, 2 Channel(s), BICMOS, 7 X 7 MM, 0.80 MM HEIGHT, ROHS COMPLIANT, MO
MAX9744ETH+T	MAXIM	获取价格	Volume Control Circuit,
MAX9746	MAXIM	获取价格	1.2W, Low-EMI, Filterless, Class D Audio Amplifier
MAX9746BEBC	MAXIM	获取价格	1.2W, Low-EMI, Filterless, Class D Audio Amplifier
MAX974C/D	MAXIM	获取价格	Ultra-Low-Power, Open-Drain, Single/Dual-Supply Comparators
MAX974CPE	MAXIM	获取价格	Ultra-Low-Power, Open-Drain, Single/Dual-Supply Comparators
MAX974CPE+	MAXIM	获取价格	暂无描述
MAX974CSE	MAXIM	获取价格	Ultra-Low-Power, Open-Drain, Single/Dual-Supply Comparators

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