MAX9708

PRODUCTION

20W/40W, Filterless, Spread-Spectrum, Mono/Stereo, Class D Amplifier

Data Sheet (Rev. 3) Product Selection Table
Part Models
2
1ku List Price
Starting From $5.87
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Part Details

  • 2 x 21W Output Power in Stereo Mode (8Ω, THD = 10%)
  • 1 x 42W Output Power in Mono Mode (4Ω, THD = 10%)
  • High Efficiency: Up to 87%
  • Filterless Class D Amplifier
  • Unique Spread-Spectrum Mode
  • Programmable Gain (+22dB, +25dB, +29.5dB, +36dB)
  • High PSRR (90dB at 1kHz)
  • Differential Inputs Suppress Common-Mode Noise
  • Shutdown and Mute Control
  • Integrated Click-and-Pop Suppression
  • Low 0.1% THD+N
  • Current Limit and Thermal Protection
  • Programmable Thermal Flag
  • SYNC Input/Output
  • Available in Thermally Efficient, Space-Saving 56-Pin TQFN Package
MAX9708
20W/40W, Filterless, Spread-Spectrum, Mono/Stereo, Class D Amplifier
MAX9708: Simplified Block Diagram
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Documentation

Data Sheet 1

Reliability Data 1

Technical Articles 1

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Hardware Ecosystem

Parts Product Life Cycle Description
Class-D Audio Amplifiers 1
MAX9741
PRODUCTION 12W+12W, Low-EMI, Spread-Spectrum, Stereo, Class D Amplifier
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Evaluation Kits

MAX9708EVKIT

Evaluation Kit for the MAX9708

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Features and Benefits

  • 10V to 18V Single DC Power-Supply Operation
  • Fully Differential or Single-Ended Inputs
  • Fully Differential Outputs
  • Drives 2 x 21W into 8Ω Speakers in Stereo Mode
  • Drives 1 x 42W into 4Ω Speaker in Mono Mode
  • Selectable Between Spread-Spectrum and Fixed-Frequency Modulation
  • Selectable Gains (+22dB, +25dB, +29.5dB, or +36dB)
  • Programmable Thermal Flag
  • Shutdown and Mute Control
  • Input and Output Clock Sync Signals
  • Thermally Efficient 56-Pin TQFN-EP Package
  • Fully Assembled and Tested

Product Details

The MAX9708 evaluation kit (EV kit) is a fully assembled and tested printed circuit board (PCB) that configures the MAX9708 Class D amplifier to drive 2 x 21W into a pair of 8Ω speakers in stereo mode, or 1 x 42W into a single 4Ω speaker in mono mode for audio applications. The EV kit’s speaker outputs can be filterless to minimize the circuit area or can be filtered to ease evaluation.

The EV kit operates from a 10VDC to 18VDC power supply. The MAX9708 EV kit accepts single-ended or differential input signals, and provides fully differential outputs. The EV kit provides an option to select between +22dB, +25dB, +29.5dB, or +36dB gains. The MAX9708 EV kit offers an option to select between fixed-frequency modulation (FFM) mode or spread-spectrum modulation (SSM) mode.

The MAX9708 EV kit provides a thermal flag that can be programmed for eight different thermal thresholds. The MAX9708 EV kit can be synchronized with an external clock, and the EV kit provides a synchronous output that allows units to be cascaded and frequency locked in a multiamplifier system.

Applications

  • Automotive
  • LCD TVs
  • PC/HiFi Audio Solutions
  • PDP TVs
MAX9708EVKIT
Evaluation Kit for the MAX9708

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