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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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Status
Active: In Production.

Data Sheet
FULL DATA SHEET (PDF, 496kB)
Download this datasheet in PDF formatDownload   Send this datasheet to any email addressE-Mail

Description
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.

An evaluation kit is available:  MAX9768EVCMAXQU, MAX9768EVKIT  

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 Spkr. Amp. VCC
    (V)    		 Spkr. Amp. VCC
    (V)    		 Spkr. Amp. ICC
    (mA)    		 POUT into 8Ω @ 1% THD+N
    (W)    		 POUT into 8Ω @ 10% THD+N
    (W)    		 Spkr. Amp. Half Pwr. THD+N
    (%)    		 SNR
    (dB)    		 PSRR
    (dB)    		 Spkr. Amp. Ext. Gain Features Channels Price
    min max typ min min A- Weighted min See Notes
    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 $0.85 @1k
    See All Speaker Amplifiers (30)

    Diagram
    MAX9768: Typical Operating Circuit
    Typical Operating Circuit

    Application Notes
  		• Application Note 3878: Reduce EMI from Class-D Amplifiers Using New Modulation Techniques and Filter Architectures - MAX9768
  		• Application Note 3879: Thermal Considerations for a Class D Amplifier - MAX9768
  		• Application Note 4046: Overview of 2.1 (Satellite/Subwoofer) Speaker Systems - MAX9768

    Evaluation Kits
  		• MAX9768EVCMAXQU, MAX9768EVKIT

    Design Guides
  		• Audio (PDF)

    Reliability Reports
  		• Reliability Report: MAX9768.pdf
  		• Show FIT data for:

    Software/Models
    none

    Ordering Information
    Notes:

    1. Other options and links for purchasing parts are listed at: http://www.maxim-ic.com/sales.
    2. Didn't Find What You Need? Ask our applications engineers. Expert assistance in finding parts, usually within one business day.
    3. Part number suffixes: T or T&R = tape and reel;+ = RoHS/lead-free;# = RoHS/lead-exempt. More: SeeFull Data Sheet or Part Naming Conventions.
    4. * Some packages have variations, listed on the drawing. "PkgCode/Variation" tells which variation the product uses. Note that "+", "#", "-" in the part number suffix describes RoHS status. Package drawings may show a different suffix character.


    Devices: 1-4 of 4

    MAX9768 Free
    Sample    		 Buy Status
    Package: TYPE PINS FOOTPRINT
      DRAWING CODE/VAR *
    		Temp RoHS/Lead-Free?
    Materials Analysis
    MAX9768BETG+  
    		Active TQFN;24 pin;17 mm²
    Outline Drawing: 21-0139 (PDF)
    Land Pattern: 90-0022 (PDF)
    Use pkgcode/variation: T2444+4*
    		-40°C to +85°C RoHS/Lead-Free: Lead Free
    Materials Analysis
    MAX9768BETG+T    
    		Active TQFN;24 pin;17 mm²
    Outline Drawing: 21-0139 (PDF)
    Land Pattern: 90-0022 (PDF)
    Use pkgcode/variation: T2444+4*
    		-40°C to +85°C RoHS/Lead-Free: Lead Free
    Materials Analysis
    MAX9768ETG+  
    		Active TQFN;24 pin;17 mm²
    Outline Drawing: 21-0139 (PDF)
    Land Pattern: 90-0022 (PDF)
    Use pkgcode/variation: T2444+4*
    		-40°C to +85°C RoHS/Lead-Free: Lead Free
    Materials Analysis
    MAX9768ETG+T    
    		Active TQFN;24 pin;17 mm²
    Outline Drawing: 21-0139 (PDF)
    Land Pattern: 90-0022 (PDF)
    Use pkgcode/variation: T2444+4*
    		-40°C to +85°C RoHS/Lead-Free: Lead Free
    Materials Analysis

    More Information
  		• New Product Press Release 2007-11-05 
  		• Product Ad: Download

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    Document Ref.: 19-0854; Rev 2; 2008-11-21
    This page last modified: 2009-09-04


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