Evaluation Board User Guide
UG-192
One
Technology
Way
•
P.O.
Box
9106
•
Norwood,
MA
02062-9106,
U.S.A.
•
Tel:
781.329.4700
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Fax:
781.461.3113
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www.analog.com
Evaluation Board for SSM2317 Filterless Class-D Audio Amplifier
PLEASE SEE THE LAST PAGE FOR AN IMPORTANT
WARNING AND LEGAL TERMS AND CONDITIONS.
Rev. 0 | Page 1 of 8
PACKAGE CONTENTS
SSM2317-EVALZ
OTHER SUPPORTING DOCUMENTATION
SSM2317 data sheet
GENERAL DESCRIPTION
The
SSM2317
is a fully integrated, single-chip, mono Class-D audio
amplifier that is designed to maximize performance for mobile phone
applications. The application circuit requires a minimum of exter-
nal components and operates from a single 2.5 V to 5.5 V supply. It
is capable of delivering 3 W of continuous output power with less
than 1% THD + N driving a 3 Ω load from a single 5.0 V supply.
The SSM2317 is equipped with a differential mode input port and a
high efficiency, full H-bridge at the output that enables direct coupling
of the audio power signal to the loudspeaker. The differential mode
input stage allows for cancelling of common-mode noise.
Automatic level control (ALC) can be activated to suppress
clipping and improve dynamic range. This feature only requires
one external resistor tied to GND via the VTH pin and an
activation voltage on the ALC_EN pin. For setup configuration
and sync operation, see the SSM2317 data sheet.
The part also features a high efficiency, low noise output modulation
scheme that does not require external LC output filters when
attached to an inductive load. The modulation provides high
efficiency even at low output power. Filterless operation also helps
to decrease distortion due to the nonlinearities of output LC filters.
This user guide describes how to configure and use the SSM2317
evaluation board to evaluate the SSM2317. It is recommended
that this data sheet be read in conjunction with the SSM2317
data sheet, which provides more detailed information about the
specifications, internal block diagrams, and application guidance
for the amplifier IC.
EVALUATION BOARD OVERVIEW
The SSM2317 evaluation board carries a complete application
circuit for driving a loudspeaker. Figure 1 shows the top view of
the evaluation board, and Figure 2 shows the bottom view.
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Figure 1. SSM2317 Evaluation Board Top View
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Figure 2. SSM2317 Evaluation Board Bottom View
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