MAX9744EVCMAXQU+ Maxim Integrated, MAX9744EVCMAXQU+ Datasheet - Page 6

• 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
The MAX9744 features four modulation-frequency oper-
ating modes, which include two fixed-frequency
modes, one spread-spectrum mode, and one external
clock mode. Table 6 shows how to use jumper JU6 to
configure these four operating modes.
When using the external clocked mode, the external
clock should be applied to the SYNC_IN pad. The
MAX9744 EV kit provides a SYNC_OUT pad to allow
synchronization of multiple amplifiers. The SYNC_IN
clock should be four times the modulation frequency.
Table 6. Modulation-Frequency Operating
Modes
* Default position.
6
6
JUMPER
JU6
_______________________________________________________________________________________
_______________________________________________________________________________________
Modulation-Mode Control and Synchronization
POSITION
SHUNT
1-2*
1-3
1-4
1-5
Unconnected
External
clocked
SYNC
GND
VDD
FFM with f
300kHz
FFM with f
360kHz
SSM with f
300kHz ±6kHz
FFM with f
(external clock
frequency)/4
Input/Output
MODE
SW
SW
SW
SW
=
=
=
=
The MAX9744 EV kit also provides an option to termi-
nate the external clock input with a 50Ω resistor. See
Table 7 to use this option.
The CMAXQUSB uses a proprietary design to provide
SPI- and I
ous Maxim devices. Maxim reserves the right to change
the implementation of this module at any time with no
advance notice.
The CMAXQUSB board provides three output voltage
level options. Jumper JU1 selects the output voltage
level between 5V, 3.3V, and 2.5V. Set the CMAXQUSB
jumper JU1 at the 3.3V position to evaluate the
MAX9744 EV kit.
The CMAXQUSB board provides an option to enable
or disable the I
nals. Enable the I
CMAXQUSB board by setting the DIP switches at SW1
to the on position to evaluate the MAX9744 EV kit.
Table 7. External Clock Termination
* Default position.
JUMPER
JU8
2
C-compatible interfaces to demonstrate vari-
2
POSITION
C pullup resistors on SDA and SCL sig-
CMAXQUSB Command Module
SHUNT
Open*
1-2
CMAXQUSB I
2
C pullup resistors on the
CMAXQUSB Power Supply
Terminated with 50Ω resister
Not terminated
2
C Pullup Resistors
FINCTION