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MAX9715

2.8W, Low-EMI, Stereo, Filterless Class D Audio Amplifier

Maxim Integrated 

19-3589; Rev 2; 7/08

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2.8W, Low-EMI, Stereo, Filterless

Class D Audio Amplifier

General Description

The MAX9715 high-efficiency, stereo, Class D audio

power amplifier provides up to 2.8W per channel into a

4Ω speaker with a 5V supply. Maxim’s second-generation

Class D technology features robust output protection,

high efficiency, and high power-supply rejection (PSRR)

while eliminating the need for output filters. Selectable

gain settings, +10.5dB or +9.0dB, adjust the amplifier

gain to suit the audio input level and speaker load.

The MAX9715 features high PSRR (71dB at 1kHz),

allowing for operation from noisy supplies without addi-

tional regulation. Comprehensive click-and-pop sup-

pression eliminates audible clicks and pops at startup

and shutdown. The MAX9715 operates from a single 5V

supply and consumes only 12mA of supply current.

Integrated shutdown control reduces supply current to

less than 100nA.

The MAX9715 is fully specified over the extended

-40°C to +85°C temperature range and is available in a

thermally enhanced 16-pin TQFN-EP package.

Features

♦ 5V Single-Supply Operation

♦ Spread-Spectrum Modulator Reduces EMI

♦ 2.8W, Class D, Stereo Speaker Amplifier (4Ω)

♦ Filterless Class D Requires No LC Output Filter

♦ High PSRR (71dB at 1kHz)

♦ 86% Efficiency (RL = 8Ω, POUT = 1W)

♦ Low-Power Shutdown Mode

♦ Integrated Click-and-Pop Suppression

♦ Low Total Harmonic Distortion: 0.06% at 1kHz

♦ Short-Circuit and Thermal Protection

♦ Internal Gain, +9.0dB or +10.5dB

♦ Available in Space-Saving Package

16-Pin Thin QFN-EP (5mm x 5mm x 0.8mm)

Applications

High-End Notebook Audio

LCD Projectors

Portable Audio

Multimedia Docking Stations

Typical Operating Circuit/Functional Diagram appears at

end of data sheet.

Block Diagram

Ordering Information

PART

TEMP RANGE PIN-PACKAGE

MAX9715ETE+

-40°C to +85°C 16 TQFN-EP*

+Denotes a lead-free/RoHS-compliant package.

*EP = Exposed pad.

Pin Configurations

4.5V TO 5.5V SUPPLY

OUTR+

INR

OUTR-

GAIN

CLASS D

AMPLIFIER

OUTL+

INL

OUTL-

MAX9715

TOP VIEW

12 11 10 9

BIAS 13

VDD 14

INR 15

MAX9715

INL 16

+

1

2

3

4

8 SHDN

7 GND

6 GAIN

5 N.C.

TQFN

________________________________________________________________ Maxim Integrated Products 1

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.

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