Microchip Technology MCP19117, Руководство пользователя

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MCP19117 FLYBACK
STAND-ALONE EVALUATION
BOARD USER’S GUIDE

2016 Microchip Technology Inc. DS50002472A-page 15
Chapter 2. Installation and Operation
2.1 ABOUT THE MCP19117 FLYBACK STAND-ALONE EVALUATION BOARD
The MCP19117 is a digitally-enhanced, power analog, synchronous low-side PWM
controller. The GUI was developed to assist users in easily configuring the MCP19117
and evaluating it in their target application.
The MCP19117 Flyback Stand-Alone Evaluation Board is designed to operate from a
single supply (nominal 8V to 14V, 24V maximum). The primary side MOSFET has a
maximum V
DS
rating of 100V. Users should be cautious that this 100V rating is not
exceeded when determining input and output conditions for their application. The
coupled inductor has a 2:1 ratio. The secondary MOSFET has a 200V maximum V
DS
rating.
The default configuration provides the gate drive supply (V
DR
) with 10V. Adequate
ceramic and bulk capacitors are supplied on the input to reduce the root mean square
(RMS) ripple current and lessen input voltage deviation caused by load transients.
Ceramic capacitors are also provided on the output to reduce voltage ripple and
provide energy to the output while the primary side is being re-energized.
The MCP19117 Flyback Stand-Alone Evaluation Board is fully assembled, pro-
grammed and tested to evaluate and demonstrate the MCP19117 operating perfor-
mance. Users will need to download and install the MCP19117 Flyback Standalone
GUI from the Microchip website and become familiar with its operation before powering
the MCP19117 Flyback Stand-Alone Evaluation Board.
2.2 SYSTEM AND CONFIGURATION REQUIREMENTS
To power-up and run the MCP19117 Flyback Stand-Alone Evaluation Board, the
following is required:
• MCP19117 Flyback Standalone GUI
• MCP19117 Flyback Stand-Alone Evaluation Board
• PICkit Serial Analyzer
For USB connectivity, the minimal physical requirement for the PC is a standard USB
2.0 port. If the board connects to the PC through a USB hub, use a self-powered hub.
The MCP19117 Flyback Stand-Alone Evaluation Board comes with preprogrammed
firmware installed to operate with the GUI. To reprogram the device, the following tools
are required:
• MPLAB X IDE (version 3.05 or later)
• MPLAB
®
XC8 C Compiler (v1.35 or later)
• MCP19117 Flyback Standalone Firmware
• MCP19117 Flyback Stand-Alone Evaluation Board
• PICkit™ 3 In-Circuit Debugger/Programmer
The MCP19117 Flyback Standalone GUI requires a Microsoft
Windows
®
XP/7/8
operating system and a minimum screen resolution of 1024 x 768.
Note: The factory-loaded firmware requires the use of the provided GUI to
function. Without the GUI, the evaluation board does not operate.