MAX9715:2.8W, Low-EMI, Stereo, Filterless Class D Audio Amplifier

High-Efficiency Audio Amplifier Provides 2.8W of Power into a 4Ω Speaker

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 additional regulation. Comprehensive click-and-pop suppression 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 TQFN-EP package.

Key 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 Packages
    • 16-Pin Thin QFN-EP (5mm x 5mm x 0.8mm)
MAX9715: Block Diagram
MAX9715: Block Diagram
Applications/Uses
  • High-End Notebook Audio
  • LCD Projectors
  • Multimedia Docking Stations
  • Portable Audio
DataSheet
titleDownload file
MAX9715 Data SheetMAX9715.pdf
Parametrics
Part NumberClassSpkr. Amp. VCC
(V)
Spkr. Amp. VCC
(V)
Spkr. Amp. ICC
(mA)
POUT into 4Ω @ 1% THD+N
(W)
POUT into 4Ω @ 10% THD+N
(W)
POUT into 8Ω @ 1% THD+N
(W)
POUT into 8Ω @ 10% THD+N
(W)
Spkr. Amp. Half Pwr. THD+N
(%)
SNR
(dB)
PSRR
(dB)
Package/PinsBudgetary
Price
minmaxtypminminminminA- WeightedminSee Notes
MAX9715D4.55.512.82.32.81.41.50.099371TQFN/16$1.06 @1k
Design kits & evaluation modules
Ordering Information
Part NumberStatusRecommended ReplacementPackageTempRoHS
MAX9715ETE+ActiveTQFN,;16 pin;26 mm²-40°C to +85°CLead Free
MAX9715ETE+TActiveTQFN,;16 pin;26 mm²-40°C to +85°CLead Free
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