ISSI IS31AP2031-QFLS2-EB Manual

IS31AP2031 CLASS-K AUDIO POWER AMPLIFIER
EVALUATION BOARD GUIDE
DESCRIPTION
The IS31AP2031 is a Class-K audio power amplifier
with automatic gain control. It drives up to 2.0W (10%
THD+N) into an 8Ω speaker from a 4.2V VCC supply.
The IS31AP2031 provides low cost, space saving
solution for portable equipments which need audio
output with higher power by boosting up supply voltage.
Its external components just include a few capacitors
and resistors (no inductor). The IS31AP2031 use fully
differential design to
IS31AP2031 integrates de-pop circuitry to reduce pop
and click noise during power on/off or shutdown enable
operation. The IS31AP2031 also integrates thermal
and short circuit protection function.
FEATURES

Operates from 2.7V to 4.5V

2.0W into an 8Ω load from a 4.2V supply (10%
THD+N)

4 gain levels: 12dB, 16dB, 24dB, 27.5dB

AGC function

Pulse Count Control serial interface

8kV HBM ESD

Thermal and short-circuit protection

Available in QFN-20 (3mm × 3mm).
QUICK START
Figure 1: Photo of IS31AP2031 Evaluation Board
ORDERING INFORMATION
Part No.
IS31AP2031-QFLS2-EB
For pricing, delivery, and ordering information, please contacts ISSI's analog marketing team at
analog@issi.com or (408) 969-660.
Integrated Silicon Solution, Inc. – www.issi.com
Rev. C, 01/22/2017
reduce RF noise. The
Temperature Range
-40°C to +85°C (Industrial)
Table 1: Ordering Information
RECOMMENDED EQUIPMENT

≤ 4.5V, 2A power supply

Audio source (i.e. MP3 player, Notebook PC, etc.)

An 8Ω speaker
ABSOLUTE MAXIMUM RATINGS

≤ 4.5V power supply
Caution: Do not exceed the conditions listed above; otherwise
the board will be damaged
PROCEDURE
The IS31AP2031 demo board is fully assembled and
tested. Follow the steps listed below to verify board
operation.
Caution: Do not turn on the power supply until all connections
are completed.
1) Connect an 8Ω (or larger) speaker across the
OUT- terminal and OUT+ terminal.
2) Connect the ground terminal of the power supply
to the GND and the positive terminal to the VCC.
Or connect DC power to connector (DC IN).
3) If the audio source is differential, remove jumper
JP1, connect the negative of the audio source to
the IN- terminal, and connect the positive of the
audio source to IN+ terminal.
4) If the audio source is single-ended, connect the
audio source to the IN- terminal, and close jumper
JP1; or connect audio source to the audio
connector (AUDIO IN) and close jumper JP1.
5) Turn on the power supply, and pay attention to the
supply current. If the current exceeds 1.5A,
please check for circuit fault.
6) Turn on the audio source.
Package
QFN-20, Lead-free
1