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MAX9768
10W Mono Class D Speaker Amplifier with Volume Control

High-Efficiency, Low BOM-Cost Class D Amplifier


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Description
FULL DATA SHEET (PDF, 496kB)
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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.

Key Features   Applications/Uses
  • 10W Output (8Ω, PVDD = 14V, THD+N = 10%)
  • Patented 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

    Key Specifications:   Speaker Amplifiers
    Part Number Class Speaker Amp. VCC (min) (V) Speaker Amp. VCC (max) (V) Speaker Amp. ICC (typ) (mA) POUT into 8Ω @ 1% THD+N (W) POUT into 8Ω @ 10% THD+N (W) Speaker Amp. Half Pwr. THD+N (%) SNR, A-weighted (dB) PSRR (db) Speaker Amp. External Gain Features Number of Channels Price**
    MAX9768  D 4.5 14 11 8 10 0.09 97 84 Yes
    Analog or Digitally Programmable Volume Control
    External Clock Synchronization
    Filterless Operation
    Wide Supply Range
    1 $0.90 @ 1k
    See All Speaker Amplifiers (29)
    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 prices and delivery, please see the price and availability page or contact an authorized distributor.

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    Document Ref.: 19-0854; Rev 2; 2008-11-21
    This page last modified: 2008-11-21



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