Infineon EVAL AUDIO MA2304 NS Series User manual

Quick start guide
Class D audio team
August 2022
EVAL_AUDIO_MA2304xNS
Valid for: MA2304DNS and MA2304PNS

Copyright © Infineon Technologies AG 2022. All rights reserved. 2
Table of contents
›How to get further support
›Product overview and features
›Board description
›Interface boards
›One-page quick start
›Default jumper/switch settings
›GUI quick start
›GUI configurations
›Audio performance testing
2022-08-24

Copyright © Infineon Technologies AG 2022. All rights reserved. 3
How to get further support
Stuck or in need of help?
Support for Infineon’s class D audio portfolio can be found quickly and easily by visiting
the Class D Audio Amplifier IC Forum or by visiting community.infineon.com.
The community forum features members of the audio applications team that are ready to
provide timely support, helping you get your designs done quickly, reliably and right the
first time.
2022-08-24

Product overview and features
Overview
The demonstration board EVAL_AUDIO_MA2304xNS is a preliminary evaluation and
demonstration board for the MERUS™ MA2304xNS family of devices. It contains digital
input/output and a variety of output and setup/selection features. It also contains an
onboard buck power supply generator (1.8 V and 3.3 V selectable) so only one external
power supply (PVDD)is necessary. The board can be used for evaluating or
demonstrating key features/advantages of the MERUS™ technology:
>Energy efficiency: power losses at typical audio listening levels/idle power loss
>THD performance and audio quality
>Compact application: minimum output filter components, no external heatsink
General features and audio performance
Number of audio channels
2 (BTL) or 1 (PBTL)
Audio input format
Digital
(I2S, LJF, RJF or TDM)
Supply voltage, P
VDD
18 V
Output noise level
52 µ
Vrms (high audio performance mode)
Dynamic range
106 dB (high audio performance mode)
Idle
consumption at PVDD = 18 V
61 mW (low power
consumption mode)
Efficiency,
1 W, 8 Ω
More
than 79 percent
Efficiency, full scale, 8
Ω
More
than 90 percent
Figure 1. MA2304xNS evaluation board
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Board description
>Recommended operating conditions
Parameter Part no. Min. Typ. Max.
Unit
P
VDD MA2304XX 10 18 20 V
V
DD MA2304XX 1.62 1.8 5.5 V
Output peak current (BTL)
MA2304XX 6.0 A
Output peak current (PBTL)
MA2304XX 12.0 A
Parameter Conditions Typ. Unit
Short
-term RMS output power
(per channel)
THD+N = 10%, RL = 4
Ω,
f = 1 kHz
37 W
Instantaneous peak output power
(per channel
)
THD+N = 1%, RL = 4
Ω, f = 1 kHz 60 W
Total harmonic distortion + noise
1 kHz, P
OUT = 1 W, RL = 4 Ω 0.03 %
Efficiency*
P
OUT = 2x1 W, 8Ω >79 %
Efficiency*
P
OUT = full scale, 8Ω >90 %
>Typical audio and electrical specifications
(BTL default configuration; power mode profiles = LPC/HAP)
I2S/TDM
digital I/O
Speaker out
CH0
PVDD power supply
terminals
Device enable/mute switches
3.3 V/1.8 V internal
supply with enable
jumper
Figure 2. EVAL_AUDIO_MA2304XX top view
* Efficiency values do not take into account the onboard 3V3 switching regulator consumption.
I2C
MUTE
ENABLE
Speaker out
CH1
PVDD/VDD
control and
measurement
I2C address
selection
BTL/PBTL
control
CLIP/ERROR
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Copyright © Infineon Technologies AG 2022. All rights reserved. 6
Interface boards
2022-08-24
MA2304xNS board
Interface boards
S/PDIF
coax
Analog
in S/PDIF
optical
›The evaluation kit includes three interface boards that convert from analog,
S/PDIF or TOSLINK signals to I2S. See the hardware user manual for details.
–Simply plug one of these boards into the digital I/O breakout header (J1).
*Note: Noise measurements and other specs will show degraded performance when using the analog in interface board.
*

Copyright © Infineon Technologies AG 2022. All rights reserved. 7
One-page quick start –audio playback
2022-08-24
1
+_
Configure jumpers and
switches to default:
3Apply power
10 to 20 V DC
2Connect
speaker(s)
4
Enable
external
I2S*: link
Configure
I2S
*GUI configuration required if using other audio formats
such as TDM, left-justified and right-justified.
On
67Unmute
Set I2S source to a low volume
level prior to unmuting
Required hardware
›EVAL_AUDIO_MA2304xNS EVK
›I2S source: interface boards (included) or audio
precision, etc.
›2 to 8 Ωspeaker(s)
›10 to 20 V DC power supply
›Micro USB cable
Connect
USB
5
link
Unmute
A
B
CPlay music

Jumper/Switch State Image
VDD_SW
VDD_ON
VDD
_SEL
Jumpered
Jumpered
3V3
J3V3SW
LDO
J_VDD
3V3
JVDD_IO
3V3
JI2C_ADD
: RAD0 Low
JI2C_ADD
: RAD1 Low
J_MSEL
BTL
SW_ENABLE
SW_MUTE
Off
Mute
Jdebug
Jumper on
pins 7 and 8
Default jumper/switch settings
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Figure 3. EVAL_AUDIO_MA2304xNS default settings

GUI quick start –installation and register map setup
The MA2304DNS/PNS can play audio by default without
configuration, but to take advantage of the many features the chip
offers it is necessary to configure the device. This is done through a
software GUI. The following pages describe how to install, set up and
connect the GUI to the device as well as an example configuration.
1. Install the program using the installer, which will also install necessary
drivers.
2. Configure the MA2304xx EVK as described in the Quick start section.
Make sure the USB cable is connected and the MUTE switch is kept as
MUTE until the device is fully configured (incorrect I2S settings can produce
loud sounds).
3. Start the program. The following screen should appear:
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Demo board
connected
(USB)
MA2304xx
detected

GUI quick start –connection modes
4. Once the GUI is started, the software can run in three different modes:
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2022-08-24 Copyright © Infineon Technologies AG 2022. All rights reserved.
›Normal mode:This screen will be shown when a connection
is made with the onboard MCU and the device:
›Demo mode:The PC has not made a connection to the board and the
GUI is therefore in demo mode. This can be used to build
configurations or test the software without hardware:
›MCU connection mode:This screen only contains a refresh button
and a green connection light indicating that a connection has been
made with the onboard MCU:
›To go to normal mode, make sure that the amplifier is
powered and its ENABLE switch is set to ON, then click the
REFRESH button.
Note:
If needed, please refer to the hardware manual for step-by-step instructions on how to
update the USB MCU firmware.

GUI quick start –initial screen indicators
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1Connected
If red, then the
connection with the
device is disrupted.
Board status
Becomes green as soon
as the board is detected,
red otherwise.
Hardware config: Device name
Detected BTL/PBTL hardware configuration
and device name.
I2C address
Detected BTL/PBTL
hardware configuration
and device name.
Status lamps
These indicate if
there are warnings or
errors.
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2
›The initial screen indicators and
descriptions are shown on the right.
›Additional information is available as
tooltips by hovering the mouse
cursor on top of a control or indicator:
›Tooltips can be enabled or disabled
in the settings menu:

GUI quick start –initial screen controls
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1
2
Configuration
Access to further
device configurations.
Also supports saving
and loading
configurations.
Refresh
Press in case of
disconnection.
Standby
Places the device in
standby mode with
no audio output.
Volume level
Controls the input volume for
all channels. Only active
when the DSP is enabled.
34DSP
The DSP is active when set
to on and bypassed when
set to off.
5
6Labels
Changes the device
and speaker labels.
›The initial screen controls
and descriptions are
shown on the right.
›Use the menu
to open the Configuration
window described in the
following pages.

Configurations –power stages
Through the power stage tab, power mode profiles, gain and drive strength can be configured. There are only two power mode
profiles that can be selected:
›LPC: low power consumption (default)
–Low power consumption, slightly higher noise
›HAP: high audio performance
–Low noise, slightly higher power consumption
The gain of the amplifier can be adjusted through the gain setting, which chooses the relation between full-scale and output voltage.
The gate driver strength can also be adjusted as a trade-off between EMI performance and efficiency.
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Configurations –I2S/TDM
On the I2S/TDM page, communication-
related configurations can be set up. The
I2S configuration is default.
No configuration is required when using
any of the interface boards as their audio
interface matches the MA2304xNS
defaults.
To route the I2S output out of the
MA2304DN, it is necessary to enable the
“TX_ENABLE” control and load a DSP
program that supports this.
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Configurations –DSP
The DSP page contains the tool to program the internal
DSP of the MA2304DNS. It contains a graphical view of
the current DSP flow and a plot of the expected
amplitude and phase response with options for viewing
single channels or combined responses.
To load a default flow, press the library button in the top-
right corner of the screen.
ADSP flow can be saved and loaded through the button
in the lower-right corner. To program a DSP flow onto
the device press “APPLY” and wait until the warning
symbol is gone. In some cases, it will be necessary to
press the button twice.
Note that the sample rate selected in the lower-left
corner has to match the sample rate of the incoming I2S
signal to the device.
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For software v700 or
lower, mute the device
before clicking APPLY.

Configurations –DSP example
To give an example of how to use the DSP, the
following will set up a crossover filter and enable the
built-in limiters of the default two-channel flow:
1. Double-click a biquad block currently marked as
“Bypass”. This will open a biquad configuration
window.
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3. To enable the limiters double-click that limiter by the end of the flow with two
triangles and a square inside the block. This will open the limiter configuration window.
Currently, a peak and RMS limiter can be enabled and configured. The limiters can be
applied to protect the system and speakers from too-large peaks or from overheating.
Once enabled and applied they will limit the output to the level set by the threshold.
Note that the attack and release time can be configured to fit with the dynamics of the
system.
2. Select “Low Pass” for one channel and “High Pass” for the other channel. Then
choose the filter type to fourth-order Linkwitz-Riley (first biquad) for one biquad and
then fourth-order Linkwitz-Riley (second biquad) for the biquad following the first. Then
select the desired cut-off frequency for the filter. In this example we chose 500 Hz.
This will result in a crossover filter with a flat combined response.
Biquad

Configurations –register browser
The register browser contains detailed information about the many registers of the MA2304xx. However, this should only be applied
in rare cases where it is necessary to modify an uncommon setting. In the early engineering sample all registers are available, but it is
not advised to modify registers without full knowledge of their function.
If it is necessary to modify some registers in the register browser, it is best to use the search function in the upper-left corner to find
the registers.
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Search

Configurations –status
On the status page, warnings and errors can be monitored. Currently, active warnings and errors will be shown with yellow or red
lights as individual indicators, while previous warnings or errors will be shown by a circle around the indicator. To clear previous states
of error indicators press the “CLEAR” button in the lower-left corner.
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Audio performance testing
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The output test setup depends on the desired evaluation:
›Speaker test
–Evaluation, listening and tuning
›Datasheet spec test
–To measure device parameters
Refer to the “Measurement methods” section of the EVK
user manual for details.
SPK+
SPK-
22µH
 
Filter
Audio
Analyzer
SPK
SPK+
SPK-
Figure 4. Speaker test setup Figure 5. Datasheet spec test setup
Example:
Audio Precision’s
AUX-0025 filter and
APx525 analyzer

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