MAX9744EVCMAXQU+ Maxim Integrated, MAX9744EVCMAXQU+ Datasheet - Page 3

• Manufacturer Part Number: MAX9744EVCMAXQU+
• Description: Audio Amplifiers Evaluation Kit/Evaluation System for the MAX9744
• Manufacturer: Maxim Integrated

Specifications of MAX9744EVCMAXQU+

• Product: Class-D
• Output Power: 20 W
• Thd Plus Noise: 0.04 %
• Supply Current: 20 mA
• Maximum Power Dissipation: 2963 mW
• Audio Load Resistance: 4 Ohms

Before beginning, the following equipment is needed:
•
•
•
•
1) For the MAX9744 EV kit, make sure the shunts of all
2) Turn the thumbwheel potentiometer clockwise all
3) Connect the left and right speakers across the
4) Connect the positive terminal of the 12V power sup-
5) Connect the audio source to the INL and INR RCA
6) Turn on the audio source, then turn on the power
7) Turn the thumbwheel potentiometer counterclock-
Before beginning, the following equipment is needed:
•
MAX9744 EV kit
One 12V, 5A power supply
Stereo audio source (i.e., CD player)
A pair of 4Ω (or 8Ω) loudspeakers
jumpers are in the following default positions:
JU1: (2-3)
JU2: (2-3)
JU3: (2-3)
JU4: (1-2)
JU5: (2-3)
JU6: (1-2)
JU8: (Open)
JU9: (Open)
the way to minimize speaker volume.
SPK_L+/SPK_L- and SPK_R+/SPK_R- banana
jacks, respectively.
ply to the VCC banana jack, and the ground termi-
nal of the power supply to the GND banana jack.
jacks.
supply.
wise to increase the volume; the audio signal
should be audible in the speakers.
The MAX9744 EV system:
MAX9744 EV kit
Maxim CMAXQUSB board
USB cable (included with CMAXQUSB)
Quick Start (for EV System)
_______________________________________________________________________________________
Stand-Alone Operation)
Quick Start (for EV Kit
Thumbwheel potentiometer
controls speaker volume
I
I
Normal operation (powered up)
Normal operation (not muted)
FFM mode with f
No terminator for SYNC_IN pad
Classic PWM modulation
2
2
C interface disabled
C interface disabled
Recommended Equipment
Recommended Equipment
SW
= 300kHz
Procedure
MAX9744 Evaluation Kit/
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•
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Note: In the following section, software-related items are
identified by bolding. Text in bold refers to items directly
from the EV kit software. Text in bold and underlined
refers to items from the Windows operating system.
1) Visit
2) Install the EV kit software on your computer by run-
3) On the CMAXQUSB board, ensure that the shunt of
4) Enable the I
5) For the MAX9744 EV kit, make sure the shunts of all
6) Carefully connect the boards by aligning the
7) Connect the left and right speakers across the
8) Connect the positive terminal of the 12V power sup-
One 12V, 5A power supply
Stereo audio source (i.e., CD player)
A pair of 4Ω (or 8Ω) loudspeakers
A user-supplied Windows 98SE/2000/XP PC with a
spare USB port
load the latest version of the EV kit software,
9744Rxx.ZIP. Save the EV kit software to a tempo-
rary folder and uncompress the ZIP file.
ning the INSTALL.EXE program inside the temporary
folder. The program files are copied and icons are
created in the Windows Start | Programs menu.
JU1 is in the 3.3V position.
board by setting the DIP switches at SW1 to the on
position.
jumpers are in the following default positions:
JU1: (1-2)
JU2: (1-2)
JU3: (1-2)
JU4: (1-2)
JU5: (2-3)
JU6: (1-2)
JU8: (Open)
JU9: (Open)
MAX9744 EV kit’s 20-pin connector with the
CMAXQUSB board’s 20-pin connector. Gently
press them together. The two boards should be
flush against each other.
SPK_L+/SPK_L- and SPK_R+/SPK_R- banana
jacks, respectively.
ply to the VCC banana jack, and the ground termi-
nal of the power supply to the GND banana jack.
www.maxim-ic.com/evkitsoftware
Evaluation System
2
C pullup resistors on the CMAXQUSB
Using I
MAX9744
ADD1 = 1
ADD2 = 1
Normal operation (powered-up)
Normal operation (not muted)
FFM mode with f
No terminator for SYNC_IN pad
Classic PWM modulation
2
C interface control
SW
= 300kHz
Procedure
to down-
3