Analog Devices │
10
MAX77831 Evaluation Kit
Evaluates: MAX77831
section (
) con-
figures the EV kit IC’s output voltage. The output voltage
is changed by adjusting the internal reference voltage.
Drag the slider to the desired internal reference voltage
(or output voltage) and click
Write
to change the output
voltage. Clicking
Read
returns the programmed internal
reference voltage (or output voltage) to the GUI.
To make evaluation easier, the GUI software displays the
corresponding output voltage value in the
Output Voltage
textbox based on the value in the Internal Reference
Voltage slider. To obtain the correct value, check the
Internal Feedback
or
External Feedback
checkbox
corresponding to the EV kit configuration. For external
feedback configuration, enter the chosen feedback resis
-
tor values in the
Top Feedback Resistor
and
Bottom
Feedback Resistor
textboxes to allow correct calculation
of the corresponding output voltage to be displayed on
the GUI software.
Note:
Changing the Internal Feedback or External
Feedback checkboxes (
) does NOT change the
feedback configuration on the EV kit. It is only for calculat
-
ing and displaying the correct output voltage value on the
GUI software. If you wish to change the EV kit’s feedback
configuration, see the EV Kit Hardware
The Miscellaneous Configuration sections (
)
show the remaining register settings of the MAX77831.
Use these sections to control internal compensation resis
-
tance, switching frequency, switching current limit, and
output voltage change slew rate (using the internal refer
-
ence voltage DVS slew rate). Refer to the MAX77831 IC
data sheet for more information on each available setting.
Click
Read
to obtain the setting stored on the IC and click
Write
to apply new settings to the IC.
Figure 10. Configuration Tab - Output Voltage Configuration Section
Figure 11. Configuration Tab - Miscellaneous Configuration Sections
