Datasheet > MAX9777ETI+

MAX9777ETI+

更新时间： 2024-11-26 02:52:11

品牌	Logo	应用领域
美信 - MAXIM		/
页数	文件大小	规格书
27页	1208K
描述
Stereo 3W Audio Power Amplifiers with Headphone Drive and Input Mux

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MAX9777ETI+ 数据手册

19-0509; Rev 0; 4/06

Stereo 3W Audio Power Amplifiers with

Headphone Drive and Input Mux

/MAX978

General Description

Features

♦ Industry-Leading, Ultra-High 100dB PSRR

The MAX9777/MAX9778 combine a stereo 3W bridge-

tied load (BTL) audio power amplifier, stereo single-

ended (SE) headphone amplifier, headphone sensing,

and a 2:1 input multiplexer all in a tiny 28-pin thin QFN

package. These devices operate from a single 4.5V to

5.5V supply and feature an industry-leading 100dB

PSRR, allowing these devices to operate from noisy

supplies without the addition of a linear regulator. An

ultra-low 0.002% THD+N ensures clean, low-distortion

amplification of the audio signal. Click-and-pop sup-

pression minimizes audible transients on power and

shutdown cycles. Power-saving features include low

♦ 3W BTL Stereo Speaker Amplifier

♦ 200mW Stereo Headphone Amplifier

♦ Low 0.002% THD+N

♦ Click-and-Pop Suppression

♦ ESD-Protected Outputs

♦ Low Quiescent Current: 13mA

♦ Low-Power Shutdown Mode: 10µA

♦ MUTE Function

♦ Headphone Sense Input

♦ Stereo 2:1 Input Multiplexer

4mV V

(minimizes DC current drain through the

speakers), low 13mA supply current, and a 10µA shut-

down mode. A MUTE function allows the outputs to be

quickly enabled or disabled.

♦ Optional 2-Wire, I C-Compatible or Parallel

Interface

♦ Tiny 28-Pin Thin QFN (5mm x 5mm x 0.8mm)

A headphone sense input detects the presence of a

headphone jack and automatically configures the

amplifiers for either speaker or headphone mode. In

speaker mode, the amplifiers can deliver up to 3W of

continuous average power into a 3Ω load. In head-

phone mode, the amplifier can deliver up to 200mW of

continuous average power into a 16Ω load. The gain of

the amplifiers is externally set, allowing maximum flexi-

bility in optimizing output levels for a given load. The

amplifiers also feature a 2:1 input multiplexer, allowing

multiple audio sources to be selected. The multiplexer

can also be used to compensate for limitations in the

frequency response of the loud speakers by selecting

an external equalizer network. The various functions are

Package

Ordering Information

CONTROL

INTERFACE

PIN-

PACKAGE

PKG

PART

CODE

MAX9777ETI+

MAX9778ETI+

I C Compatible 28 Thin QFN-EP* T2855-6

Parallel 28 Thin QFN-EP* T2855-6

Note: All devices are specified over the -40°C to +85°C operat-

ing temperature range.

+Denotes lead-free package.

*EP = Exposed paddle.

Pin Configurations and Functional Diagrams appear at end

of data sheet.

controlled by either an I C-compatible (MAX9777) or

simple parallel control interface (MAX9778).

The MAX9777/MAX9778 are available in a thermally

efficient 28-pin thin QFN package (5mm x 5mm x

0.8mm). These devices have thermal-overload protec-

tion (OVP) and are specified over the extended -40°C

to +85°C temperature range.

Simplified Block Diagram

SINGLE SUPPLY

4.5V TO 5.5V

LEFT IN1

LEFT IN2

Applications

SE/

BTL

Notebooks

PC Audio Peripherals

Camcorders

Portable DVD Players

Tablet PCs

RIGHT IN1

RIGHT IN2

Multimedia Monitor

I²C-

CONTROL

COMPATIBLE

MAX9777

________________________________________________________________ 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.

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与MAX9777ETI+相关器件

型号	品牌	获取价格	描述	数据表
MAX9778	MAXIM	获取价格	Stereo 3W Audio Power Amplifiers with Headphone Drive and Input Mux
MAX9778ETI+	ROCHESTER	获取价格	3W, 2 CHANNEL, AUDIO AMPLIFIER, QCC28, 5 X 5 MM, 0.80 MM HEIGHT, LEAD FREE, MO-220WHHD-1,
MAX9778ETI+	MAXIM	获取价格	Stereo 3W Audio Power Amplifiers with Headphone Drive and Input Mux
MAX9778ETI+T	MAXIM	获取价格	Audio Amplifier, 3W, 2 Channel(s), 1 Func, 5 X 5 MM, 0.80 MM HEIGHT, ROHS COMPLIANT, MO-22
MAX9779	MAXIM	获取价格	2.6W Stereo Audio Power Amplifier and DirectDrive Headphone Amplifier
MAX9779ETI+	MAXIM	获取价格	2.6W Stereo Audio Power Amplifier and DirectDrive Headphone Amplifier
MAX9779ETI+T	MAXIM	获取价格	Audio Amplifier, 2.6W, 2 Channel(s), 1 Func, BICMOS, 5 X 5 MM, 0.80 MM HEIGHT, LEAD FREE,
MAX977EEE	MAXIM	获取价格	Single/Dual, +3V/+5V Dual-Speed Comparators with Auto-Standby
MAX977EEE+	MAXIM	获取价格	Comparator, 2 Func, 3000uV Offset-Max, 28ns Response Time, CMOS, PDSO16, 0.150 INCH, 0.025
MAX977EEE-T	MAXIM	获取价格	Comparator, 2 Func, 3000uV Offset-Max, 28ns Response Time, CMOS, PDSO16, 0.150 INCH, 0.025

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