Datasheet

Detailed Description
The MAX9730 EV kit features the MAX9730 Class G
power amplifier IC, designed to drive a dynamic speak-
er in BTL configuration. The EV kit operates from a DC
power supply that provides 2.7V to 5.5V and 2A of cur-
rent. The EV kit accepts single-ended or differential
audio input and provides a fully differential output. The
audio input source is amplified to drive 2.4W into an 8Ω
speaker with a 5V power supply.
Customizing the Gain
The MAX9730 EV kit is shipped with a gain of +12dB
and is set by resistors R1–R4. Change resistors R1–R4 to
reconfigure the gain of the EV kit. Refer to the MAX9730
IC data sheet for more detail.
Charge-Pump Frequency Set Resistor
The charge-pump frequency is set by resistor R5. The
charge pump’s normal operation frequency is 330kHz.
Change R5 to change the charge-pump frequency.
Refer to the MAX9730 IC data sheet for more information.
Jumper Selection
Shutdown Mode ( SHDN )
Jumper JU1 controls the shutdown pin (SHDN) of the
MAX9730 IC. The shutdown pin can also be controlled
by an external logic controller connected to the EV kit
SHDN pad. Remove the shunt from jumper JU1 before
connecting an external controller to the SHDN pad. See
Table 1 for shunt positions.
Evaluates: MAX9730
MAX9730 Evaluation Kit
2 _______________________________________________________________________________________
Table 1. JU1 Jumper Selection
(Shutdown Mode)
* Default position.
SHUNT
POSITION
SHDN PIN
CONNECTED TO
EV KIT FUNCTION
1-2* VDD EV kit enabled
2-3 GND Shutdown mode
None
External logic
controller
SHDN driven by external
logic controller. Shutdown is
active-low and is 1.8V logic
compliant.