MCP1012
1W DEMONSTRATION BOARD
USER’S GUIDE
2020 Microchip Technology Inc.
DS50002932A-page 9
Chapter 1. Product Overview
1.1
INTRODUCTION
This chapter provides an overview of the MCP1012 1W Demonstration Board and
covers the following topics:
•
•
MCP1012 1W Demonstration Board Description
•
Contents of the MCP1012 1W Demonstration Board Kit
1.2
MCP1012 SHORT OVERVIEW
(
1.2.1
Features
• High Voltage Start-Up (rated 500V/700V)
• Internal Open-Loop, Peak Current Mode, Current Regulator for Start-Up
• Current Regulator Constant 21.0 µs OFF Time
• Programmable Low Frequency Oscillator (LFO) Period
• Cycle-by-Cycle Current Limiting
• Protection against Continuous Conduction Mode (CCM) of Operation
• Able to Accept External PWM Commands from a Secondary-Side Controller via
Isolator (Optocoupler or Pulse Transformer)
• Undervoltage Lockout (UVLO) and Overvoltage Lockout (OVLO) Protections
• Sleep and Wake-Up Commands
• Robust Gate Driver, able to drive 2.2 nF Load at 65 kHz
• Overtemperature Protection (Thermal Shutdown)
• Package: 7-Lead SOIC
• Environmentally Friendly, EU RoHS Compliant, Pb-Free
1.2.2
Description
The MCP1012 is used as a primary-side start-up IC for starting an off-line Switch Mode
Power Converter, exemplified in this user’s guide and the data sheet by a Flyback
converter.
The primary functions of the MCP1012 are:
• Starting-Up the Flyback Converter using an Internal Open-Loop, Peak Current
Mode, Current Regulator
• Accepting PWM commands via optocoupler or pulse transformer from a
Secondary-Side Controller
• Providing undervoltage (UVLO) and overvoltage (OVLO) protection
• Peak cycle-by-cycle current limiting when either under control of its internal
current regulator or under control of the Secondary-Side Controller
• Overtemperature protection
Note 1:
More detailed information regarding the capabilities of the MCP1012 is
available in the data sheet.
