19-3589; Rev 1; 8/05
2.8W, Low-EMI, Stereo, Filterless
Class D Audio Amplifier
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
www.DataSheegta4Uin.ctoomsuit 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
thermally enhanced 16-pin thin QFN-EP and 16-pin
♦ 5V Single-Supply Operation
♦ Patented 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 Packages
16-Pin Thin QFN-EP (5mm x 5mm x 0.8mm)
High-End Notebook Audio
Multimedia Docking Stations
Typical Operating Circuit/Functional Diagram appears at
end of data sheet.
4.5V TO 5.5V SUPPLY
-40°C to +85°C
-40°C to +85°C
+Denotes lead-free package.
*EP = Exposed paddle.
12 11 10 9
GAIN CLASS D
1 23 4
Pin Configurations continued at end of data sheet.
________________________________________________________________ Maxim Integrated Products 1
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.