Microchip Technology MCP19114, Руководство пользователя

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MCP19114 - FLYBACK
STAND-ALONE EVALUATION
BOARD USER’S GUIDE

2014 Microchip Technology Inc. DS50002255A-page 11
Chapter 1. Product Overview
1.1 INTRODUCTION
This chapter provides an overview of the MCP19114 - Flyback Stand-Alone Evaluation
Board and covers the following topics:
• MCP19114 Short Overview
• What is the MCP19114 - Flyback Stand-Alone Evaluation Board?
• MCP19114 - Flyback Stand-Alone Evaluation Board Kit Contents
1.2 MCP19114 SHORT OVERVIEW
The MCP19114 is a highly integrated, mixed-signal, analog pulse width-modulation
(PWM) current mode controller with an integrated microcontroller core and offers syn-
chronous or asynchronous operation. Since the MCP19114 device uses traditional
analog control circuitry to regulate the output current or voltage, the integration of the
PIC
®
Microcontroller mid-range core is used to provide complete customization of the
device’s operating parameters, protection levels, programmable offset, deadtimes,
slope compensation and fault handling procedures.
The MCP19114 has two internal LDOs. A 5V LDO (V
DD
) provides internal power to all
the digital circuitry and can supply limited external power at the V
DD
pin. A 4V LDO
(AV
DD
) provides power to the internal analog circuitry and supplies the reference volt-
age to the ADC. This device features synchronous low-side integrated drivers and
4k word non-volatile memory, all in a space-saving 24-pin 4mm x 4mm QFN package.
Finally, to support traditional MOSFETs, pin 18 (V
DR
) is used to provide input power to
the two low-side synchronous gate drivers. The evaluation board is populated with the
Microchip TC1240A voltage doubler. Resistor population provides the option of
powering V
DR
with 10V via the TC1240A voltage doubler (R19, R21 populated, R22 not
populated) or 5V (R22 populated, R19, R21 not populated) gate-drive capability.
User firmware, including device configuration, is loaded using Microchip’s MPLAB X
®
- Integrated Development Environment (IDE). A graphical user’s interface (GUI) is
used to communicate with and edit operating parameters of the MCP19114. The GUI
communicates via I
2
C™ using the PICkit™ Serial Analyzer.
The GUI offers the user the ability to adjust the programmable features available in the
MCP19114. The GUI cannot stop the user from uploading incorrect settings to the
device. Incorrect settings may have unintended consequences, including, but not lim-
ited to, unstable operation, damaging the load, and even damaging of the MCP19114
device. It is the user's responsibility to understand the system effects of the parameters
they enter.