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 8 speakers in stereo mode, or 1 x 42W into a single 4 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.
Key Features
Applications/Uses
10V to 18V Single DC Power-Supply Operation
Fully Differential or Single-Ended Inputs
Fully Differential Outputs
Drives 2 x 21W into 8 Speakers in Stereo Mode
Drives 1 x 42W into 4 Speaker in Mono Mode
Selectable Between Spread-Spectrum and Fixed-Frequency Modulation
Selectable Gains (+22dB, +25dB, +29.5dB, or +36dB)
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speakers in stereo mode, or 1 x 42W into a single 4