Microchip Technology MCP19117, User Manual

Page: 25 / 42

Graphical User Interface (GUI) Features

2016 Microchip Technology Inc. DS50002472A-page 25
3.2.1.4 PROTECTION SECTION
The “Protection” section (see Figure 3-5 ) allows the user to set levels for the three
adjustable protection features:
• Enable Input OVLO: specified range of 9V to 24V. The default setting is 18V. This
parameter is configurable per its specified range.
• Enable Input UVLO: specified range is 4V to 20V. The default setting is 8V. This
parameter is configurable per its specified range.
• Enable Output OVLO: configurable range between 0V and 60V. The default
setting is 40V.
FIGURE 3-5: Protection Options.
In order for the user to be able to set different values, the corresponding check boxes
of the features must be selected. Otherwise, the protections are not applied.
The LED (marked with D2) on the evaluation board is used to indicate various fault
conditions. The firmware will flash this LED to indicate each of the following fault
conditions:
• VIN UVLO FAULT: Short Flash Routine
• VIN OVLO FAULT: Long Flash Routine
• OUTPUT OV FAULT: Short/Long Flash Routine
3.2.1.5 SWITCHES ENABLE/DISABLE SECTION
There are two general purpose MOSFET low-side series switches located on
MCP19117 Flyback Stand-Alone Evaluation Board (LSW1 and LSW2). The check
boxes named “Switch 1” and “Switch 2” in the Switches Enable/Disable section of the
GUI allow the user to turn these switches ON (selected) and OFF (cleared).
WARNING
Use caution when changing from these default settings to ensure that damage will not
occur. The VINUVLO, VINOVLO and Output OV controls adjust the VINUVLO, VINOVLO
and OVREFCON registers, respectively.