10W Mono Class D Speaker Amplifier with Volume Control

High-Efficiency, Low BOM-Cost Class D Amplifier


The MAX9768 mono 10W Class D speaker amplifier provides high-quality, efficient audio power with an integrated volume control function.

The MAX9768 features a 64-step dual-mode (analog or digitally programmable) volume control and mute function. The audio amplifier operates from a 4.5V to 14V single supply and can deliver up to 10W into an 8Ω speaker with a 14V supply.

A selectable spread-spectrum mode reduces EMI-radiated emissions, allowing the device to pass EMC testing with ferrite bead filters and cable lengths up to 1m. The MAX9768 can be synchronized to an external clock, allowing synchronization of multiple Class D amplifiers.

The MAX9768 features high 77dB PSRR, low 0.08% THD+N, and SNR up to 97dB. Robust short-circuit and thermal-overload protection prevent device damage during a fault condition. The MAX9768 is available in a 24-pin thin QFN-EP (4mm x 4mm x 0.8mm) package and is specified over the extended -40°C to +85°C temperature range.
MAX9768: Typical Operating Circuit MAX9768: Typical Operating Circuit Enlarge+

Key Features

  • 10W Output (8Ω, PVDD = 14V, THD+N = 10%)
  • Spread-Spectrum Modulation
  • Meets EN55022B EMC with Ferrite Bead Filters
  • Amplifier Operation from 4.5V to 14V Supply
  • 64-Step Integrated Volume Control (I²C or Analog)
  • Low 0.08% THD+N (RL = 8Ω, POUT = 6W)
  • High 77dB PSRR
  • Two tON Times Offered
    • MAX9768—220ms
    • MAX9768B—15ms
  • Low-Power Shutdown Mode (0.5µA)
  • Short-Circuit and Thermal-Overload Protection


  • Flat-Panel Displays
  • GPS Navigation Systems
  • Multimedia Monitors
  • Notebook Computers
  • Security/Personal Mobile Radio
Part Number Class Spkr. Amp. VCC
Spkr. Amp. VCC
Spkr. Amp. ICC
POUT into 8Ω @ 1% THD+N
POUT into 8Ω @ 10% THD+N
Spkr. Amp. Half Pwr. THD+N
min max typ min min A- Weighted min See Notes
MAX9768  D 4.5 14 11 8 10 0.09 97 84 $1.08 @1k
See All Speaker Amplifiers (32)
Pricing Notes:
This pricing is BUDGETARY, for comparing similar parts. Prices are in U.S. dollars and subject to change. Quantity pricing may vary substantially and international prices may differ due to local duties, taxes, fees, and exchange rates. For volume-specific and version-specific prices and delivery, please see the price and availability page or contact an authorized distributor.

MAX9768EVCMAXQU: Evaluation Kit/Evaluation System for the MAX9768
MAX9768EVKIT: Evaluation Kit/Evaluation System for the MAX9768

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