Analog Devices MAX77857, Руководство пользователя

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Evaluates: MAX77857 (WLP) MAX77857 Evaluation Kit
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The POK Status and Fault Interrupt Masks section ( Figure 11 ) configures the reflection of the bits in INT_SRC to the
POKB/INTB pin. If a bit is masked, its status in the INT_SRC register is not shown on the POKB/INTB pin. Refer to the
Power-OK Monitor and Fault Interrupts section in the IC data sheet for more information about the operation of the
POKB/INTB pin. Click Read to obtain the setting stored on the IC and click Write to apply new settings to the IC.
Figure 11. Configuration Tab
—POK Status and Fault Interrupt Masks Section
The Output Voltage Configuration section ( Figure 12 ) configures the EV kit ICs 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 resistor values in the Top Feedback Resistor and Bottom Feedback Resistor
text boxes to allow the correct calculation of the corresponding output voltage to be displayed on the GUI software.
Note: Changing the Internal Feedback or External Feedback checkboxes ( Figure 12 ) does NOT change the feedback
configuration on the EV kit. It is only for calculating 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
Output Voltage Configuration section
for details.
Figure 12. Configuration Tab
—Output Voltage Configuration Section
The Miscellaneous Configuration sections ( Figure 13 ) show the remaining register settings of the MAX77857. Use
these sections to control internal compensation resistance, switching frequency, switching current limit, forced-PWM
mode, and output voltage change slew rate (using the internal reference voltage DVS slew rate). Refer to the
MAX77857
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.