Microchip Technology MCP19117, User Manual

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Graphical User Interface (GUI) Features
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2016 Microchip Technology Inc. DS50002472A-page 23
3.2 MCP19117 FLYBACK STANDALONE GUI DESCRIPTION
As depicted in Figure 3-2 , the MCP19117 Flyback Standalone GUI is divided into five
areas:
• System Parameters Area
• Advanced Register Update Area
• Register Online Adjust Area
• Control Buttons Area
• Operating Status Box Area
3.2.1 System Parameters Area
The following sections are available in the System Parameters Area
• Drivers Enable/Disable Section
• Operating Mode Section
• Parameters Section
• Protection Section
• Switches Enable/Disable Section
• Test Pin Section
3.2.1.1 DRIVERS ENABLE/DISABLE SECTION
The “Drivers Enable/Disable” section contains an “ON” and an “OFF” check box. If the
“OFF” check box is selected (default), the system turns off the Primary and Secondary
Drivers and all the sections in the MCP19117 Flyback Standalone GUI become read
only. In order for the sections to become editable, select the “ON” check box.
3.2.1.2 OPERATING MODE SECTION
The “Operating Mode” section controls how the Flyback converter operates. Options
are:
• Quasi-resonant: the controller will run Quasi-resonant mode and the switching
frequency will vary depending on the operation conditions.
• Fixed Frequency: the switching frequency parameters are adjustable. By default,
the check box is selected.
FIGURE 3-3: Operating Mode Options.
This section also contains a selection named Synchronous Operation. When the ON
check box in the Drivers Enable/Disable section is selected, the Synchronous
Operation check box is automatically selected – setting the MCP19117 Flyback
Stand-Alone Evaluation Board to function in Synchronous mode.
If the Synchronous Operation check box is cleared, the evaluation board is set to
function in Asynchronous Operation mode, which disables the secondary driver
(SDRV).