MAX9709

更新时间： 2024-11-29 11:14:15

品牌	Logo	应用领域
美信 - MAXIM		放大器
页数	文件大小	规格书
24页	644K
描述
25W/50W, Filterless, Spread-Spectrum, Stereo/Mono, Class D Amplifier

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MAX9709 数据手册

19-3769; Rev 0; 9/05

25W/50W, Filterless, Spread-Spectrum,

Stereo/Mono, Class D Amplifier

General Description

Features

The MAX9709 stereo/mono, Class D audio power amplifi-

er delivers up to 2 x 25W into an 8Ω stereo mode and

1 x 50W into a 4Ω load in mono mode while offering up to

87% efficiency. The MAX9709 provides Class AB amplifi-

er performance with the benefits of Class D efficiency,

eliminating the need for a bulky heatsink and conserving

power. The MAX9709 operates from a single +10V to

+22V supply, driving the load in a BTL configuration.

♦ 2 x 25W Output Power in Stereo Mode

(8Ω, THD = 10%)

♦ 1 x 50W Output Power in Mono Mode

(4Ω, THD = 10%)

♦ High Efficiency: Up to 87%

♦ Filterless Class D Amplifier

♦ Unique Patented Spread-Spectrum Mode

♦ Programmable Gain (+22dB, +25dB, +29.5dB,

The MAX9709 offers two modulation schemes: a fixed-fre-

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

modulation (SSM) mode that reduces EMI-radiated emis-

sions. The MAX9709 can be synchronized to an external

clock from 600kHz to 1.2MHz. A synchronized output

allows multiple units to be cascaded in the system.

+36dB)

♦ High PSRR (90dB at 1kHz)

♦ Differential Inputs Suppress Common-Mode

Noise

♦ Shutdown and Mute Control

♦ Integrated Click-and-Pop Suppression

♦ Low 0.1% THD+N

♦ Current Limit and Thermal Protection

♦ Programmable Thermal Flag

♦ Clock Synchronization Input and Output

Features include fully differential inputs, comprehensive

click-and-pop suppression, and four selectable-gain set-

tings (22dB, 25dB, 29.5dB, and 36dB). A pin-program-

mable thermal flag provides seven different thermal

warning thresholds. Short-circuit and thermal-overload

protection prevent the device from being damaged

during a fault condition.

♦ Available in Thermally Efficient, Space-Saving

The MAX9709 is available in 56-pin TQFN (8mm x 8mm

x 0.8mm) and 64-pin TQFP (10mm x 10mm x 1.4mm)

packages, and is specified over the extended

-40°C to +85°C temperature range.

Packages: 56-Pin TQFN and 64-Pin TQFP

Ordering Information

PKG

CODE

PART

TEMP RANGE PIN-PACKAGE

Applications

LCD TVs

PDP TVs

MAX9709ETN+ -40°C to +85°C 56 TQFN-EP**

MAX9709ECB+* -40°C to +85°C 64 TQFP-EP**

T5688-3

C64E-6

Automotive

PC/HiFi Audio Solutions

+Denotes lead-free package.

*Future product—Contact factory for availability.

**EP = Exposed paddle.

Pin Configurations appear at end of data sheet.

Simplified Block Diagram

MAX9709

SYNCOUT

MAX9709

FS1, FS2

SYNC

FS1, FS2

SYNC

RIGHT

CHANNEL

AUDIO

INPUT

CLASS D

MODULATOR

CLASS D

MODULATOR

LEFT

CHANNEL

GAIN

DIGITAL

GAIN

CONTROL

OUTPUT

CONTROL

OUTPUT

PROTECTION

MONO

PROTECTION

MONO

G1, G2

TH0, TH1,

TH2

TH0, TH1,

TH2

TEMP

STEREO MODE

MONO MODE

________________________________________________________________ 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.

12 3 4 5 6 7...24

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与MAX9709相关器件

型号	品牌	获取价格	描述	数据表
MAX9709ECB	MAXIM	获取价格	25W/50W, Filterless, Spread-Spectrum, Stereo/Mono, Class D Amplifier
MAX9709ECB+	MAXIM	获取价格	Audio Amplifier, 29W, 2 Channel(s), 1 Func, BICMOS, PQFP64, 10 X 10 MM, 1.40 MM HEIGHT, RO
MAX9709ECB+T	MAXIM	获取价格	Audio Amplifier, 29W, 2 Channel(s), 1 Func, BICMOS, PQFP64, 10 X 10 MM, 1.40 MM HEIGHT, MS
MAX9709ETN	MAXIM	获取价格	25W/50W, Filterless, Spread-Spectrum, Stereo/Mono, Class D Amplifier
MAX9709ETN+D	MAXIM	获取价格	Audio Amplifier, 29W, 2 Channel(s), 1 Func, BICMOS, PQCC56, 8 X 8 MM, 0.80 MM HEIGHT, ROHS
MAX9709ETN+T	MAXIM	获取价格	Audio Amplifier, 29W, 2 Channel(s), 1 Func, BICMOS, PQFP56, 8 X 8 MM, 0.80 MM HEIGHT, MO-2
MAX9709ETN+TD	MAXIM	获取价格	Audio Amplifier, 29W, 2 Channel(s), 1 Func, BICMOS, PQCC56, 8 X 8 MM, 0.80 MM HEIGHT, ROHS
MAX970EEE	MAXIM	获取价格	Single/Dual/Quad, Micropower, Ultra-Low-Voltage, Rail-to-Rail I/O Comparators
MAX970EEE+T	MAXIM	获取价格	Comparator, 4 Func, 10000uV Offset-Max, 20000ns Response Time, CMOS, PDSO16, 0.150 INCH, R
MAX970ESD	MAXIM	获取价格	Single/Dual/Quad, Micropower, Ultra-Low-Voltage, Rail-to-Rail I/O Comparators

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