Datasheet > MAX9773

MAX9773

更新时间： 2024-11-06 02:52:43

品牌	Logo	应用领域
美信 - MAXIM		/
页数	文件大小	规格书
21页	603K
描述
1.8W, Filterless, Ultra-Low EMI, Stereo Class D Audio Power Amplifier

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MAX9773 数据手册

19-3976; Rev 0; 1/06

1.8W, Filterless, Ultra-Low EMI,

Stereo Class D Audio Power Amplifier

General Description

Features

♦ Filterless Amplifier Passes FCC-Radiation

The MAX9773 3rd-generation, ultra-low EMI, stereo,

Class D audio power amplifier provides Class AB per-

formance with Class D efficiency. The MAX9773 deliv-

ers 1.8W per channel into a 4Ω load, and offers

efficiencies above 90%. Active emissions limiting (AEL)

circuitry greatly reduces EMI by actively controlling the

output FET gate transitions under all possible transient

conditions. AEL controls high-frequency emissions

resulting from conventional Class D free-wheeling

behavior in the presence of an inductive load. Zero-

dead-time (ZDT) technology maintains state-of-the-art

efficiency and THD+N performance by allowing the out-

put FETs to switch simultaneously without cross con-

duction. A spread-spectrum modulation scheme

eliminates the need for output filtering found in tradition-

al Class D devices. These design concepts reduce

component count and extend battery life.

Emissions Standards with 6in of Cable

♦ Unique Spread-Spectrum Mode and Active

Emissions Limiting Achieves Better than 15dB

Margin Under FCC Limit

♦ Zero Dead Time (ZDT) H-Bridge Maintains Good

THD+N Performance

♦ Single-Supply Operation (2.5V to 5.5V)

♦ Stereo Output (4Ω, V

= 5V, THD+N = 1%,

OUT

= 1.8W)

♦ No LC Output Filter Required

♦ 85% Efficiency (R = 8Ω, P = 600mW)

♦ Less Than 0.1% THD+N

♦ High 80dB PSRR

♦ Fully Differential Inputs

♦ Integrated Click-and-Pop Suppression

♦ Low-Power Shutdown Mode (0.1µA)

♦ Short-Circuit and Thermal-Overload Protection

♦ Pin-for-Pin Compatible with the MAX9701

The MAX9773 offers two modulation schemes: a fixed-

frequency (FFM) mode, and a spread-spectrum (SSM)

mode that reduces EMI-radiated emissions. The

MAX9773 oscillator can be synchronized to an external

clock through the SYNC input, allowing synchroniza-

tion of multiple Maxim Class D amplifiers. The sync

output (SYNC_OUT) can be used for a master-slave

application where more channels are required. The

MAX9773 features a fully differential architecture, a full

bridge-tied load (BTL) output, and comprehensive

click-and-pop suppression. The device features inter-

nally set gains of 12dB, 15.6dB, 20dB, and 26dB

selected through two gain-select inputs, further reduc-

ing external component count.

♦ Available in Thermally Efficient, Space-Saving

Packages

24-Pin TQFN-EP (4mm x 4mm x 0.8mm)

20-Bump UCSP (2mm x 2.5mm x 0.6mm)

Ordering Information

PIN-

PKG

PART

TEMP RANGE

PACKAGE

CODE

MAX9773EBP-T -40°C to +85°C 20 UCSP-20

MAX9773ETG+ -40°C to +85°C 24 TQFN-EP*

B20-1

T2444-4

The MAX9773 features high 80dB PSRR, less than

0.1% THD+N, and SNR in excess of 88dB. Short-circuit

and thermal-overload protection prevent the device

from being damaged during a fault condition. The

MAX9773 is available in 24-pin thin QFN-EP (4mm x

4mm x 0.8mm), and 20-bump UCSP™ (2mm x 2.5mm x

0.6mm) packages. The MAX9773 is specified over the

extended -40°C to +85°C temperature range.

+Denotes lead-free package.

*EP = Exposed paddle.

Block Diagram

MAX9773

INR+

INR-

RIGHT

MODULATOR

AND H-BRIDGE

Applications

GAIN1

GAIN2

GAIN

Cellular/Multimedia Phones

Notebooks

INL+

LEFT

MODULATOR

AND H-BRIDGE

Handheld Gaming Consoles

MP3 Players

INL-

Pin Configurations and Gain Selection appear at end of

data sheet.

OSCILLATOR

SYNC

SYNC_OUT

UCSP is a trademark of Maxim Integrated Products, Inc.

________________________________________________________________ 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...21

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与MAX9773相关器件

型号	品牌	获取价格	描述	数据表
MAX9773EBP-T	MAXIM	获取价格	1.8W, Filterless, Ultra-Low EMI, Stereo Class D Audio Power Amplifier
MAX9773ETG+	MAXIM	获取价格	1.8W, Filterless, Ultra-Low EMI, Stereo Class D Audio Power Amplifier
MAX9773ETG+T	MAXIM	获取价格	Audio Amplifier, 1.8W, 2 Channel(s), 1 Func, BICMOS, 4 X 4 MM, 0.80 MM HEIGHT, LEAD FREE,
MAX9775	MAXIM	获取价格	2 x 1.5W, Stereo Class D Audio Subsystem with DirectDrive Headphone Amplifier
MAX9775_V01	MAXIM	获取价格	2 x 1.5W, Stereo Class D Audio Subsystem with DirectDrive Headphone Amplifier
MAX9775EBX+	MAXIM	获取价格	Audio Amplifier, 3 Func, BICMOS, PBGA36
MAX9775EBX+T	MAXIM	获取价格	2 x 1.5W, Stereo Class D Audio Subsystem with DirectDrive Headphone Amplifier
MAX9775EBX+T*	MAXIM	获取价格	2 x 1.5W, Stereo Class D Audio Subsystem with DirectDrive Headphone Amplifier
MAX9775ETJ+	MAXIM	获取价格	2 x 1.5W, Stereo Class D Audio Subsystem with DirectDrive Headphone Amplifier
MAX9775ETJ+*	MAXIM	获取价格	2 x 1.5W, Stereo Class D Audio Subsystem with DirectDrive Headphone Amplifier

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