MAX9744EVCMAXQU+ Maxim Integrated, MAX9744EVCMAXQU+ Datasheet - Page 4

• 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

MAX9744 Evaluation Kit/
Evaluation System
9) Connect the audio source to the INL and INR RCA
10) Turn on the audio source, then turn on the power
11) Connect the USB cable from the PC to the
12) Follow the directions of the Add New Hardware
13) Start the MAX9744 EV kit software by opening its
14) The EV kit software automatically detects the
The MAX9744 EV kit software provides an easy user
interface (see Figure 1) to control the programmable
features of the MAX9744. To start the MAX9744 EV kit
software, double-click the MAX9744 EV kit icon created
during installation. The user must wait approximately 2s
while the MAX9744 EV kit software connects to the
CMAXQUSB board.
Inside the Volume Control group box is the volume
control track bar, which corresponds to the speaker
volume register. By dragging the track bar, the correct
I
speaker volume register of the MAX9744.
4
2
C/SMBus write operation is generated to update the
Detailed Description of Software
jacks.
supply.
CMAXQUSB board. A Building Driver Database
window should pop up in addition to a New
Hardware Found message if this is the first time
this board is connected to the PC. If you do not see
a window that is similar to the one described
above after 30s, try removing the USB cable from
the CMAXQUSB and reconnect it. Administrator
privileges are required to install the USB device dri-
ver on Windows 2000 and XP. Refer to the TROU-
BLESHOOTING_USB.PDF document included with
the software if you have any problems during this
step.
Wizard to install the USB device driver. Choose the
Search for the best driver for your device option.
Specify the location of the device driver to be
C:\Program Files\MAX9744 (default installation
directory) using the Browse button.
icon in the Start menu.
MAX9744 I
MAX9744. Using the mouse to drag the Volume
Control scroll bar to increase the volume, the audio
signal should be audible in the speakers.
_______________________________________________________________________________________
2
C slave address and resets the
Volume Control Group Box
The I2C Address group box drop-down list selects the
MAX9744’s I
connected to the I
down list to manually change the device’s I
address according to the settings of JU2 and JU3, as
shown in Table 3.
The Class D modulation mode can be controlled
through two radio buttons (Classic and Filterless),
which represent the classic PWM modulation and filter-
less PWM modulation.
Figure 1. MAX9744 EV Kit Software GUI Window
PWM Modulation Mode Group Box
2
C slave address. If multiple devices are
2
C bus, the user can use this drop-
The I2C Address Group Box
2
C slave