MAX9709

PRODUCTION

25W/50W, Filterless, Spread-Spectrum, Stereo/Mono, Class D Amplifier

Data Sheet (Rev. 2) Product Selection Table
Part Models
3
1ku List Price
Starting From $10.37
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Part Details

  • 2 x 25W Output Power in Stereo Mode (8Ω, THD = 10%)
  • 1 x 50W 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
  • Clock Synchronization Input and Output
  • Available in Thermally Efficient, Space-Saving Package: 56-Pin TQFN
MAX9709
25W/50W, Filterless, Spread-Spectrum, Stereo/Mono, Class D Amplifier
MAX9709: Simplilfied Block Diagram
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Documentation

Data Sheet 1

Reliability Data 1

Technical Articles 1

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Software Resources

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Hardware Ecosystem

Parts Product Life Cycle Description
Audio Amplifiers 1
MAX9708
PRODUCTION 20W/40W, Filterless, Spread-Spectrum, Mono/Stereo, Class D Amplifier
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Evaluation Kits

MAX9709EVKIT

Evaluation Kit for the MAX9709

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Features and Benefits

  • 10V to 22V Single DC Power-Supply Operation
  • Fully Differential or Single-Ended Inputs
  • Fully Differential Outputs
  • Drives Up to 2 x 25W into 8Ω Speakers in Stereo Mode
  • Drives Up to 1 x 50W 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 MAX9709 evaluation kit (EV kit) is a fully assembled and tested circuit board that configures the MAX9709 Class D amplifier to drive 25W into each of two 8Ω speakers in stereo mode, or 50W into a single 4Ω speaker in mono mode. 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 10V DC to 22V DC power supply. The MAX9709 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 MAX9709 EV kit offers an option to select between fixed-frequency modulation (FFM) mode or spread-spectrum modulation (SSM) mode.

The MAX9709 EV kit provides a thermal flag that can be programmed for eight different thermal thresholds. The MAX9709 EV kit can be synchronized with an external clock. Additionally, 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

Buy Now View Details

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
MAX9709EVKIT
Evaluation Kit for the MAX9709
MAX9708EVKIT
Evaluation Kit for the MAX9708

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