MCP1012 - Electronic component Microchip - Free user manual and instructions

USER MANUAL MCP1012 Microchip

1W Demonstration Board

User's Guide

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© 2020, Microchip Technology Incorporated, All Rights Reserved.

ISBN: 978-1-5224-5618-6

For information regarding Microchip's Quality Management Systems, please visit www.microchip.com/quality.

Table of Contents

Preface 5

Introduction....5

Document Layout 5

Conventions Used in this Guide 7

Recommended Reading....8

The Microchip Website....8

Customer Support 8

Document Revision History 8

Chapter 1. Product Overview

1.1 Introduction ...... 9

1.2 MCP1012 Short Overview ^(1) 9

1.3 MCP1012 1W Demonstration Board Description .... 10

1.4 Contents of the MCP1012 1W Demonstration Board Kit .... 11

Chapter 2. Installation and Operation

2.1 Getting Started 13

2.2 Setup Procedure 13

Chapter 3. Setup One

3.1 Setup 1A .... 15

Introduction.... 15

Steps 15

3.2 Setup 1B ...... 16

Introduction.... 16

Steps 16

Chapter 4. Setup Two

4.1 Setup 2 .... 19

Introduction....19

Steps 19

Chapter 5. Setup Three

5.1 Setup 3 23

Introduction....23

Steps 23

Chapter 6. Setup Four

6.1 Setup 4A 27

Introduction....27

MCP1012 1W Demonstration Board User's Guide

Steps 27

6.2 Setup 4B ...... 28

Introduction.... 28

Steps 28

Chapter 7. Setup Five

7.1 Setup 5 .... 31

Introduction.... 31

Steps 31

Appendix A. Schematic and Layouts

A.1 Introduction 33

A.2 Board – Schematic 34

A.3 Board – Top Silk 35

A.4 Board – Top Copper and Silk 35

A.5 Board – Top Copper 36

A.6 Board – Bottom Copper 36

A.7 Board – Bottom Copper and Silk 37

A.8 Board – Bottom Silk 37

Appendix B. Bill of Materials (BOM) 39

Worldwide Sales and Service 43

Preface

NOTICE TO CUSTOMERS

All documentation becomes dated, and this manual is no exception. Microchip tools and documentation are constantly evolving to meet customer needs, so some actual dialogs and/or tool descriptions may differ from those in this document. Please refer to our website (www.microchip.com) to obtain the latest documentation available.

Documents are identified with a "DS" number. This number is located on the bottom of each page, in front of the page number. The numbering convention for the DS number is "DSXXXXXA", where "XXXXX" is the document number and "A" is the revision level of the document.

For the most up-to-date information on development tools, see the MPLAB ^® IDE online help. Select the Help menu, and then Topics to open a list of available online help files.

INTRODUCTION

This chapter contains general information that will be useful to know before using the MCP1012 1W Demonstration Board. Items discussed in this chapter include:

• Document Layout
  • Conventions Used in this Guide
  • Recommended Reading
  • The Microchip Website
• Customer Support
  • Document Revision History

DOCUMENT LAYOUT

This document describes how to use the MCP1012 1W Demonstration Board as a development tool. The manual layout is as follows:

- Chapter 1. "Product Overview" – Important information about the MCP1012 1W Demonstration Board.

- Chapter 2. "Installation and Operation" – Includes instructions on how to get started with the MCP1012 1W Demonstration Board and a description of each function.

- Chapter 3. "Setup One" – Description of the functioning of the MCP1012 in Start-Up mode when it is supplied by the secondary side of the transformer and no load is applied at the output (neither of the R20, R21, R22, or R23 resistors is connected) (setup 1A) as well as a description of the functioning of the MCP1012 in Start-Up mode when it is supplied by the secondary side of the transformer and a load is applied at the output (the resistor R21 - 68Ω is connected through SW1.2) (setup 1B).

- Chapter 4. "Setup Two" – Description of the functioning of the MCP1012 in Start-Up mode when it is supplied by an external power supply (15V) at V_DD pin

and a load is applied at the output (the resistor R20 - 51Ω is connected through SW1.1).

• Chapter 5. "Setup Three" – Description of the Sleep/Wake-Up functions of the MCP1012 in Start-Up mode when it is supplied by an external power supply (15V) at VDD pin and a load is applied at the output (the resistor R20 - 51Ω is connected through SW1.1).
• Chapter 6. “Setup Four” – A description of the functioning of the MCP1012 in Normal Run mode when an external command is applied at PULSE pin and the C/S pin voltage does not reach the COMP1 Reference (252 mV) (setup 4A) as well as a description of the functioning of the MCP1012 in Normal Run mode when an external command is applied at PULSE pin and the C/S pin voltage reaches the COMP1 Reference (252 mV) (setup 4B).
• Chapter 7. "Setup Five" – Description of the functioning of the MCP1012 in Start-Up mode when a short circuit is created on the secondary side of the transformer.
• Appendix A. “Schematic and Layouts” – Shows the schematic and layouts for the MCP1012 1W Demonstration Board.
• Appendix B. "Bill of Materials (BOM)" – Lists the parts used to build the MCP1012 1W Demonstration Board.

CONVENTIONS USED IN THIS GUIDE

This manual uses the following documentation conventions:

DOCUMENTATION CONVENTIONS

Description Represents Examples
Arial font:
Italic characters Referenced books	mPLAB	^ IDE User's Guide
	Emphasized text ...is the only compiler...
Initial caps A window the Output	ut window
	A dialog the Settings dialog
	A menu selection select Enable Programmer
Quotes A field name in a window or dialog		"Save project before build"
Underlined, italic text with right angle bracket	A menu path File>Save	——
Bold characters A dialog button	Click OK
	A tab	Click the Power tab
N'Rnnnn	A number in verilog format, where N is the total number of digits, R is the radix and n is a digit.	4'b0010, 2'hF1
Text in angle brackets <>	A key on the keyboard	Press,,
Courier New font:
Plain Courier New	Sample source code	#define START
	Filenames	autoexec.bat
	File paths	c:\mccl8\h
	Keywords	_asm, _endasm, static
	Command-line options	-0pa+, -0pa-
	Bit values	0, 1
	Constants	0xFF, 'A'
Italic Courier New	A variable argument	file.o, where file can be any valid filename
Square brackets []	Optional arguments	mccl8 [options] file [options]
Curly brackets and pipe character: { | }	Choice of mutually exclusive arguments; an OR selection	errorlevel {0|1}
Ellipses... Replaces repeated text	var_name [,	var_name...]
	Represents code supplied by user	void main (void){ ...}

RECOMMENDED READING

This user's guide describes how to use the MCP1012 1W Demonstration Board. Another useful document is listed below. The following Microchip document is available and recommended as a supplemental reference resource:

- MCP1012 Data Sheet - "Primary Side Start-Up IC for Isolated Converters" (DS20006277)

THE MICROCHIP WEBSITE

Microchip provides online support via our website at www.microchip.com. This website is used as a means to make files and information easily available to customers. Accessible by using your favorite Internet browser, the website contains the following information:

• Product Support – Data sheets and errata, application notes and sample programs, design resources, user's guides and hardware support documents, latest software releases and archived software
• General Technical Support – Frequently Asked Questions (FAQs), technical support requests, online discussion groups, Microchip consultant program member listing
• Business of Microchip – Product selector and ordering guides, latest Microchip press releases, listing of seminars and events, listings of Microchip sales offices, distributors and factory representatives

CUSTOMER SUPPORT

Users of Microchip products can receive assistance through several channels:

• Distributor or Representative
- Local Sales Office
• Field Application Engineer (FAE)
- Technical Support

Customers should contact their distributor, representative or field application engineer (FAE) for support. Local sales offices are also available to help customers. A listing of sales offices and locations is included in the back of this document.

Technical support is available through the website at:

http://www.microchip.com/support.

DOCUMENT REVISION HISTORY

Revision A (February 2020)

- Initial release of this document.

Chapter 1. Product Overview

1.1 INTRODUCTION

This chapter provides an overview of the MCP1012 1W Demonstration Board and covers the following topics:

• MCP1012 Short Overview(1)
• MCP1012 1W Demonstration Board Description
- Contents of the MCP1012 1W Demonstration Board Kit

1.2 MCP1012 SHORT OVERVIEW (1)

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.

AC LINE INTERFACE SERIES REGULATOR C1 D2 C2 T1 C4 LOAD D3 D1 VIN VDD MCP1012 GATE C/S PULSE GNDLFO Q1 R1 R2 C3

FIGURE 1-1: MCP1012 Typical Application — in an Open Loop Flyback Topology.

1.3 MCP1012 1W DEMONSTRATION BOARD DESCRIPTION

The MCP1012 1W Demonstration Board is used to evaluate and demonstrate Microchip Technology's MCP1012 product. This board demonstrates the capabilities of the MCP1012 in a Flyback converter application supplied from an external voltage source (120V–500V), with regulated output.

L2 777 Coilcraft X MCP1012 1W DEMO BOARD R1 F1 + GND TB1 1 VDD External + TB2 GND TP15 TP8 TP4 J2 TP5 TP6 D3 J1 J5 R24 DB RoHS Primary Side PIN1 PIN2 TP2 TP10 R2B R2A TR1 R8 R10 R9 C3 Q1 TP7 TP3 TP9 TP11 ALU G C6 D7 T2 R35B R35A R35D R35C R23 R22 R21 R20 R15 U2 R17B R19 Resistive Load Select Output + TB3 1 GND Protection Circuit TP16 Secondary Side Ext. Ctrl Side Controller Supply 5V + GND 1 TB4 PinKit Header

FIGURE 1-2: MCP1012 1W Demonstration Board Top View.

1.4 CONTENTS OF THE MCP1012 1W DEMONSTRATION BOARD KIT

The MCP1012 1W Demonstration Board kit includes:

• MCP1012 1W Demonstration Board (DT100118)
- Isolated Jumper JP1 (Mechanical hardware jumper 6.35 mm 1x2 D3087-98)
• Important Information Sheet

NOTES:

Chapter 2. Installation and Operation

2.1 GETTING STARTED

In order to use and evaluate the capabilities of the MCP1012, several hardware tools are required and several guidelines will be followed.

2.1.1 Required Hardware Tools

• MCP1012 1W Demonstration Board (DT100118)
• 120–500 VDC, min. 0.5A DC HV power supply
• 15.0 VDC, min. 0.5A DC power supply
- 5.0 VDC, min. 100 mA DC power supply (only for Sleep/Wake-Up functions testing)
- DC Voltmeter
- Jumpers (2.54 mm)
- Oscilloscope (optional)
• Signal Generator (optional)

2.1.2 Recommendations before Starting the Setup Process

• Place the MCP1012 1W Demonstration Board on a non-conductive surface when connected to the DC power supplies.
• Do not come into contact with the demonstration board while it is connected to the DC HV power supply.
• Disconnect the demonstration board from the DC power supplies before performing any work on the MCP1012 1W Demonstration Board.
• Connect instruments that have earth-referenced inputs (such as most oscilloscopes) only if the galvanic separation is present against the AC mains, or use a 1:1 transformer for supplying the demonstration board.

Failure to adhere to these guidelines may result in damage to the demo unit, the tests instruments, and/or can put in danger the person conducting the tests.

2.2 SETUP PROCEDURE

The functionality of the MCP1012 1W Demonstration Board can be evaluated through seven different setups, which are described in the following chapters.

NOTES:

Chapter 3. Setup One

3.1 SETUP 1A

INTRODUCTION

This setup will show the functioning of the MCP1012 in Start-Up mode when it is supplied by the secondary side of the transformer and no load is applied at the output (neither of the R20, R21, R22, or R23 resistors is connected).

STEPS

1. Connect/disconnect the jumpers and the switch SW1 according to Table 3-1.

TABLE 3-1: STATE OF THE JUMPERS AND SWITCH - SETUP 1A

Note 1: JP1 and J3 connections eliminate the galvanic isolation between the Primary Side and the Secondary Side of the transformer. Specific safety procedures must be taken into account. The MCP1012 is supplied from the secondary side of the transformer. On the board JP1 is connected to PIN1 and PIN2.
2. Connect the voltmeter at the TB3 connector with the positive test probe at the upper terminal.
3. If available, connect two oscilloscope probes at TP1 (V_DD Input) and TP6 (GATE output). Connect the ground probes on the primary side, at the TP14 or TP15 Test Points.
4. Connect the DC HV power supply in the range of 120–500 VDC at TB1:

• the positive terminal must be connected at the uppermost terminal of the TB1 PCB connector

• the negative terminal must be connected to the bottommost terminal of the TB1 PCB connector (the middle terminal of the TB1 PCB connector is not connected)

• Read the voltmeter and check if the output voltage of the board is in the range of 4.5V to 5.5V.

• Check on the oscilloscope screen the V _DD voltage and the GATE signal as they are presented in Figure 3-1.

FIGURE 3-1: MCP1012 V_GATE and V Load. DD Hysteretic Voltage Supply at No

Note that the MCP1012 is hysteretic supplied, between the OVLO ON and OVLO OFF thresholds.

1. Disconnect the DC HV power supply.

3.2 SETUP 1B

INTRODUCTION

This setup will show the functioning of the MCP1012 in Start-Up mode when it is supplied by the secondary side of the transformer and a load is applied at the output (the resistor R21 - 68Ω is connected through SW1.2)

STEPS

1. Connect/disconnect the jumpers and the switch SW1 according to Table 3-2.

TABLE 3-2: THE STATE OF THE JUMPERS AND SWITCH - SETUP 1B

Note 1: JP1 and J3 connections eliminate the galvanic isolation between the Primary Side and the Secondary Side of the transformer. Specific safety procedures must be taken into account. The MCP1012 is supplied from the secondary side of the transformer. On the board JP1 is connected to PIN1 and PIN2.

2: SW1.2 is the second switch on the right side of the board.

1. Connect the voltmeter at the TB3 connector with the positive test probe at the upper terminal.

2. If available, connect two oscilloscope probes at TP1 (V_DD Input) and TP6 (GATE output). Connect the ground probes on the primary side, at the TP14 or TP15 Test Points.

3. Connect the DC HV power supply in the range of 120–500 VDC at TB1:

4. the positive terminal must be connected at the uppermost terminal of the TB1 PCB connector

5. the negative terminal must be connected to the bottommost terminal of the TB1 PCB connector (the middle terminal of the TB1 PCB connector is not connected)

6. Read the voltmeter and check if the output voltage of the board is in the range of 4.5V to 5.5V.

7. Check on the oscilloscope screen the V_DD voltage and the GATE signal as they are presented in Figure 3-2.

FIGURE 3-2: MCP1012 V_GATE and V
_DD when a Load Is Connected.

1. Disconnect the DC HV power supply.

NOTES:

Chapter 4. Setup Two

4.1 SETUP 2

INTRODUCTION

This setup will show the functioning of the MCP1012 in Start-Up mode when it is supplied by an external power supply (15V) at V_DD pin and a load is applied at the output (the resistor R20 - 51Ω is connected through SW1.1).

A voltage greater than 11.5V on V_DD pin disables the internal HV regulator.

STEPS

1. Connect/disconnect the jumpers and the switch SW1 according to Table 4-1.

TABLE 4-1: THE STATE OF THE JUMPERS AND SWITCH - SETUP 2

Note 1: SW1.1 is the first switch on the right side of the board.

1. Connect the voltmeter at the TB3 connector with the positive test probe at the upper terminal.
2. If available, connect two oscilloscope probes at TP6 (GATE output) and TP8 (C/S input). Connect the ground probes on the primary side, at the TP14 or TP15 Test Points.
3. Connect the DC power supply 15V at the TB2 connector:

- the positive terminal must be connected at the upper terminal of the TB2 PCB connector

- the negative terminal must be connected to the bottom terminal of the TB2 PCB connector

1. Connect the DC HV power supply in the range of 120–500 VDC at the TB1 connector:

- the positive terminal must be connected at the uppermost terminal of the TB1 PCB connector

- the negative terminal must be connected to the bottommost terminal of the TB1 PCB connector (the middle terminal of the TB1 PCB connector is not connected)

1. Read the voltmeter and check if the output voltage of the board is in the range of 4.5V to 5.5V.

2. Check on the oscilloscope screen the V_GATE voltage and the C/S signal, as they are presented in Figure 4-1.

FIGURE 4-1: MCP1012 V_GATE and C/S Voltage.

During the Leading Edge Blanking (LEB) period the spikes on C/S pin are ignored. After LEB, once the C/S voltage reaches the threshold of 125 mV, the GATE signal is inhibited.

1. Check on the oscilloscope screen the V_GATE voltage, as it is presented in Figure 4-2. Set the oscilloscope accordingly.

FIGURE 4-2: MCP1012 V_GATE Voltage.

The value of the resistor connected to LFO pin is 47.5 kΩ. This value conducts to an LFO period of 1.06 ms or a frequency of 943 Hz. On each LFO period, a number of 16 pulses can be seen.

1. Check on the oscilloscope screen the V_GATE voltage, as it is presented in the Figure 4-3. Set the oscilloscope accordingly.

FIGURE 4-3: MCP1012 V_GATE Voltage, t OFF Interval.

After V_GATE signal is inhibited, t_OFF has a constant interval of 21.0 s.

1. Disconnect the DC power supplies.

NOTES:

Chapter 5. Setup Three

5.1 SETUP 3

INTRODUCTION

This setup will show the Sleep/Wake-Up functions of the MCP1012 in Start-Up mode when it is supplied by an external power supply (15V) at V_DD pin and a load is applied at the output (the resistor R20 - 51Ω is connected through SW1.1).

The Sleep/Wake-Up functions are active in both Start-Up and Normal Run mode.

STEPS

1. Connect/disconnect the jumpers and the switch SW1 according to Table 5-1.

TABLE 5-1: THE STATE OF THE JUMPERS AND SWITCH - SETUP 3

Note 1: SW1.1 is the first switch on the right side of the board.
2. Connect the voltmeter at the TB3 connector with the positive test probe at the upper terminal.
3. If available, connect two oscilloscope probes at TP6 (GATE output) and TP4 (PULSE input). Connect the ground probes on the primary side, at the TP14 or TP15 Test Points.
4. Connect the DC power supply 15V at the TB2 connector:

• the positive terminal must be connected at the upper terminal of the TB2 PCB connector

• the negative terminal must be connected to the bottom terminal of the TB2 PCB connector

• Connect the DC power supply 5.0V at the TB4 connector:

• the positive terminal must be connected at the upper terminal of the TB4 PCB connector

• the negative terminal must be connected to the bottom terminal of the TB4 PCB connector

• Connect a DC HV power supply in the range of 120–500 VDC at the TB1 connector:

- the positive terminal must be connected at the uppermost terminal of the TB1 PCB connector

- the negative terminal must be connected to the bottommost terminal of the TB1 PCB connector (the middle terminal of the TB1 PCB connector is not connected)

1. Read the voltmeter and check if the output voltage of the board is in the range of 4.5V to 5.5V.

2. Push the push button SW2 and check on the oscilloscope screen the V_GATE voltage and the PULSE signal, as they are presented in Figure 5-1 and Figure 5-2.

FIGURE 5-1: MCP1012 Sleep Command.

Five pulses applied on PULSE pin negative edge at 500 kHz activate the Sleep function of the MCP1012.

FIGURE 5-2: MCP1012 Sleep Command (Figure 5-1 Detail).

1. Read the voltmeter and check if the output voltage is 0V.

2. Push the push button SW2 again and check on the oscilloscope screen if the V_GATE voltage and the PULSE signal are as they are presented in Figure 5-3 and Figure 5-4.

FIGURE 5-3: MCP1012 Wake-Up Command.

The Wake-Up command consists of a single valid PWM Pulse.

FIGURE 5-4: MCP1012 Wake-Up Command (Figure 5-3 Detail).

If the external PWM signal ceases for a period greater than 260 s typical, then the gate driver will be driven by the internal current regulator (return to Start-Up mode).

1. Read the voltmeter and check if the output voltage of the board is in the range of 4.5V to 5.5V.

2. Disconnect the DC power supplies.

NOTES:

Chapter 6. Setup Four

6.1 SETUP 4A

INTRODUCTION

This setup will show the functioning of the MCP1012 in Normal Run mode when an external command is applied at PULSE pin and the C/S pin voltage does not reach the COMP1 Reference (252 mV).

When a valid PWM signal in the 20-65 kHz frequency range is detected on the PULSE pin and the internal HV regulator is turned off by applying a voltage greater than 11.5V typical on the V_DD pin, the MCP1012's gate driver is driven by the signal at the PULSE pin and not by the internal signal. The COMP1 Reference threshold during external command switches from 125 mV to 252 mV typical.

STEPS

1. Connect/disconnect the jumpers and the switch SW1 according to Table 6-1.

TABLE 6-1: THE STATE OF THE JUMPERS AND SWITCH - SETUP 4A

1. Connect at the jumper J4 an external load consisting of a 10Ω, min. 3W resistor.
2. Connect at the jumper J6 the output of the signal generator with the next setup: square waveform, minimum voltage 0V, maximum voltage +5.0V, frequency 20 kHz, duty cycle 75%.
3. Connect three oscilloscope probes at TP4 (PULSE input), TP6 (GATE output), and TP8 (C/S input). Connect the ground probes on the primary side, at the TP14 or TP15 Test Points.
4. Connect a DC power supply 15V at the TB2 connector:

- the positive terminal must be connected at the upper terminal of the TB2 PCB connector

- the negative terminal must be connected to the bottom terminal of the TB2 PCB connector

1. Connect a 120 VDC DC HV power supply at TB1:

- the positive terminal must be connected at the uppermost terminal of the TB1 PCB connector

- the negative terminal must be connected to the bottommost terminal of the TB1 PCB connector (the middle terminal of the TB1 PCB connector is not connected)

1. Activate the output of the signal generator

2. Check on the oscilloscope screen the signals V_PULSE, V_GATE and V_C/S as they are presented in Figure 6-1

FIGURE 6-1: V_PULSE, V_GATE and V_CS when COMP1 Reference Is Not Reached.

When a valid PWM signal in the 20–65 kHz frequency range is applied the MCP1012's gate driver is driven by the signal at the PULSE pin and not by the internal signal. The COMP1 Reference threshold during external command switches from 125 mV to 252 mV typical.

1. Disconnect the DC power supplies.

2. Disconnect the load at J4.

6.2 SETUP 4B

INTRODUCTION

This setup will show the functioning of the MCP1012 in Normal Run mode when an external command is applied at PULSE pin and the C/S pin voltage reaches the COMP1 Reference (252 mV).

STEPS

1. Connect/disconnect the jumpers and the switch SW1 according to Table 6-2.

TABLE 6-2: THE STATE OF THE JUMPERS AND SWITCH - SETUP 4B

1. Connect at the jumper J4 an external load consisting of a 10Ω, min 3W resistor.

2. Connect at the jumper J6 the output of the signal generator with the next setup: square waveform, minimum voltage 0V, maximum voltage +5.0V, frequency 20 kHz, duty cycle 30%.

3. Connect three oscilloscope probes at TP4 (PULSE input), TP6 (GATE output), and TP8 (C/S input). Connect the ground probes on the primary side, at the TP14 or TP15 Test Points.

4. Connect a DC power supply 15V at the TB2 connector:

5. the positive terminal must be connected at the upper terminal of the TB2 PCB connector

6. the negative terminal must be connected to the bottom terminal of the TB2 PCB connector

7. Connect a 120 VDC DC HV power supply at TB1:

8. the positive terminal must be connected at the uppermost terminal of the TB1 PCB connector

9. the negative terminal must be connected to the bottommost terminal of the TB1 PCB connector (the middle terminal of the TB1 PCB connector is not connected)

10. Activate the output of the signal generator.

11. Check on the oscilloscope screen the signals V_PULSE, V_GATE, and V_C/S as they are presented in Figure 6-2.

FIGURE 6-2: V_PULSE, V_GATE, and V_CS when the COMP1 Reference Is Reached.

When the voltage on the C/S pin reaches the COMP1 reference (typ. 252 mV), the Gate command is turned off even if the PULSE logic state is Low.

1. Disconnect the DC power supplies.

NOTES:

Chapter 7. Setup Five

7.1 SETUP 5

INTRODUCTION

This setup will show the functioning of the MCP1012 in Start-Up mode when a short circuit is created on the secondary side of the transformer.

STEPS

1. Connect/disconnect the jumpers and the switch SW1 according to Table 7-1.

TABLE 7-1: THE STATE OF THE JUMPERS AND SWITCH - SETUP 5

Note 1: JP1 connection eliminates the galvanic isolation between the Primary Side and the Secondary Side of the transformer. Specific safety procedures must be taken into account.

2: SW1.1 is the first switch on the right side of the board.

1. Connect a voltmeter at the TB3 connector with the positive test probe at the upper terminal.

2. If available, connect two oscilloscope probes at TP6 (GATE output) and TP12. Connect the ground probes on the primary side, at the TP14 or TP15 Test Points.

3. Connect a DC power supply 15V at the TB2 connector:

- the positive terminal must be connected at the upper terminal of the TB2 PCB connector

- the negative terminal must be connected to the bottom terminal of the TB2 PCB connector

1. Connect a DC HV power supply in the range of 120–500 VDC at the TB1 connector:

- the positive terminal must be connected at the uppermost terminal of the TB1 PCB connector

- the negative terminal must be connected to the bottommost terminal of the TB1 PCB connector (the middle terminal of the TB1 PCB connector is not connected)

1. Read the voltmeter and check if the output voltage of the board is 0V.

2. Check on the oscilloscope screen the V_GATE voltage during the short circuit condition as it is presented in Figure 7-1.

FIGURE 7-1: MCP1012 V_GATE Voltage during a Short Circuit Condition.

1. Disconnect the DC power supplies.
2. Disconnect the jumper J4.
3. Reconnect the DC power supplies.

Check the functionality of the MCP1012 by running the setups described in this user's guide.

Appendix A. Schematic and Layouts

A.1 INTRODUCTION

This appendix contains the following schematic and layouts for the MCP1012 1W Demonstration Board:

• Board – Schematic
• Board – Top Silk
  • Board – Top Copper and Silk
• Board – Top Copper
• Board – Bottom Copper
  • Board – Bottom Copper and Silk
• Board – Bottom Silk

A.2 BOARD - SCHEMATIC

DO Input Voltage NC1 P5/000V 5 CDD DC DC DC DC DC DC DC DC DC DC DC DC DC DC DC DC DC DC DC DC DC DC DC DC DC DC DC DC DC DC DC DC DC DC DC DC DC DC DC DC DC DC DC DC DC DC DC DC DC DC D2 H21 H22 H23 H24 H25 H26 H27 H28 H29 H30 H31 H32 H33 H34 H35 H36 H37 H38 H39 H40 H41 H42 H43 H44 H45 H46 H47 H48 H49 H50 H51 H52 H53 H54 H55 H56 H57 H58 H59 H60 H61 H62 H63 H64 H65 H66 H67 H68 H69 H70 H71 H72 H73 H74 H75 H76 H77 H78 H79 H80 H81 H82 H83 H84 H85 H86 H87 H88 H89 H90 H91 H92 H93 H94 H95 H96 H97 H98 H99 H100 T111-120V 10A 1A 1A 1A 1A 1A 1A 1A 1A 1A 1A 1A 1A 1A 1A 1A 1A 1A 1A 1A 1A 1A 1A 1A 1A 1A 1A 1A 1A 1A 1A 1A 1A 1A 1B, T12, T13, T14, T15, T16, T17, T18, T19, T20, T21, T22, T23, T24, T25, T26, T27, T28, T29, T30, T31, T32, T33, T34, T35, T36, T37, T38, T39, T40, T41, T42, T43, T44, T45, T46, T47, T48, T49, T50, T51, T52, T53, T54, T55, T56, T57, T58, T59, T60, T61, T62, T63, T64, T65, T66, T67, T68, T69, T70, T71, T72, T73, T74, T75, T76, T77, T78, T79, T80, T81, T82, T83, T84, T85, T86, T87, T88, T89, T90, T91, T92, T93, T94, T95, T96, T97, T98, T99, T100, T101=Iinc between PNT and PIK2. TII = Termor Block. TP = Tool Pin. T = Jumper. JPT is a line between PNT and PIK2. TII = Termor Block. TP = Tool Pin. T = Jumper.

A.3 BOARD - TOP SILK

C1 L2 L1 MCP1012 1W DEMO BOARD R1 F1 1 + GND TBI 1 VDD External + GND TB2 CE RoHS Primary Side P1N1 P1N2 TP17 SH1 TP2 TP10 TR1 R8 R10 R9 R11 C3 TP7 Q1 R14A R14B R14C R14D TP3 D4 R7A R7B C2 D2 TP1 D5 D1 R6B R6A TP9 TP11 C6 D7 J3 R32 U5 C13 R33 R35B R35A R35D R35C TP16 Resistive Load Select Output 1 GND Protection Circuit MicroCHIP DT100118 Secondary Side Ext. Ctrl Side Controller Supply 5U + GND D11 1 TB4 R23 R22 R21 R20 R18 R19 U2 R17B R17A C5 D6 C7 CB R16 R15 C5 D6 TP12 TP13 TP16 TP2 TP2A TP2B TP2C TP2D TP2E TP2F TP2G TP2H TP2I TP2J TP2K TP2L TP2M TP2N TP2O TP2P TP2Q TP2R TP2S TP2T TP2U TP2V TP2W TP2X TP2Y TP2Z TP2A TP2B TP2C TP2D TP2E TP2F TP2G TP2H TP2I TP2J TP2K TP2L TP2M TP2N TP2O TP2P TP2Q TP2R TP2S TP2T TP2U TP2V TP2W TP2X TP2V TP2W TP2X TP2Y TP2Z

A.4 BOARD - TOP COPPER AND SILK

L2 MCP1012 1W DEMO BOARD R1 F1 + TP15 GND TB1 1 VDD External + GND TB2 CE RoHS Primary Side MicroCHIP DT100118 Primary Side Secondary Side Ext. Ctrl Side Controller Supply 5U + R28 R29 GND D11 J6 J7 C10 SN2 J8 1 PickIt Header TP14 TP13 TP12 TP11 TP10 TP2 TR1 R2B R2A R8 R10 R9 R11 C3 Q1 TP7 TP3 TP9 TP11 TP12 TP13 TP16 R16 C7 C8 R18 U2 R17B R19 Resistive Load TB3 C5 D6 J4 Select Output + 1 GND Protection Circuit TPI6 R32 U5 C13 R33 R35B R35A R35D R35C

A.5 BOARD - TOP COPPER

Pure electrical circuit lines without any symbols

A.6 BOARD - BOTTOM COPPER

Close-up of a printed circuit board layout with traces and dot patterns (no readable text or symbols)

A.7 BOARD - BOTTOM COPPER AND SILK

Four-panel technical illustration of a printed circuit board layout with no visible text or symbols

A.8 BOARD - BOTTOM SILK

Abstract geometric pattern with scattered dots and rectangles on white background (no text or symbols)

NOTES:

Appendix B. Bill of Materials (BOM)

TABLE B-1: BILL OF MATERIALS (BOM)

Qty.	Reference Description	Manufacturer Part Number
1 C1	Capacitor, film, 2	2 μF 305VAC 20% radialP27.5L31.5W14H24.5	EPCOS AG B32924C3225M
2 C2	C7 Capacitor, ceramic, μF 50V10% X7R, surface mount, 0805	Murata Electronics North America, Inc.	GRM21BR71H105KA12L
1 C3	Capacitor, ceramic, 1000 pF2KV 10% X7R surface mount, 1206	Johanson Dielectrics Inc.	202R18W102KV4E
1C4	Capacitor, ceramic, 330 pF50V 5% C0G surface mount, 0603	KEMET	C0603C331J5GACTU
1C5	Capacitor, ceramic, 330 pF200V 10% X7R surface mount, 0603	KEMET	C0603C331K2RAC7867
1 C6	Capacitor, Alu., 330 μF 50V20% surface mount, G	Panasonic Electronic Components	EEE-FT1H331AP
1 C8	Capacitor, ceramic, 2.2 μF 16V10% X7R surface mount, 0805	Murata Electronics North America, Inc	GRM21BR71C225KA12L
1C9	Capacitor, ceramic, 0.47 μF 50V10% X7R surface mount, 0805	Murata Electronics North America, Inc	GRM21BR71H474KA88L
1 C10	Capacitor, ceramic, 10000 pF25V 10% X7R surface mount, 0603	Panasonic®- ECG	ECJ-1VB1E103K
1 C11	Capacitor, ceramic, 0.1 μF 50V10% X7R, surface mount, 0805	Cal-Chip Electronics Inc.	MC21X7R104K50NTLF
1 C12	Capacitor, ceramic, 10 μF 10V10% X5R, surface mount, 0805	Taiyo Yuden Co., Ltd.	LMK212BJ106KG-T
1 C13	Capacitor, ceramic, 1000 pF50V 10% X7R, surface mount, 0805	Murata Electronics North America	GRM216R71H102KA01D
1 C14	Capacitor, ceramic, 1000 pF50V 20% X7R, surface mount, 0603	TDK Corporation	C1608X7R2A102K080AA
3 D1, D2, D7	Diode, rectifier, US1M 1.7V 1A1000V DO-214AC_SMA	Vishay Dale	US1M-E3/61T
1 D3	Diode, TVS, SMA	AJ22A 22V400W SMD DO-214AC_SMA	Bourns®, Inc. SMAJ22A
1 D4	Diode, TVS, P6KE510 434V600W DO-214AA_SMB	Micro Commercial Components Corp. (MCC)	SMBJP6KE510A-TP
1 D5	Diode, Schottky, BAT46W-TP450 mV 10 mA 100V, surface mount, SOD-123	Micro Commercial Components Corp. (MCC)	BAT46W-TP
Qty.	Reference	Description	Manufacturer	Part Number
1 D6	Diode, Schottky,	DFLS1200-7850 mV 1A 200V POW-ERDI-123	Diodes Incorporated®	DFLS1200-7
1 D8	Diode, zener, SMAZ18-13-F18V 1W DO-214AC_SMA		Diodes Incorporated SMAZ18-13-F
1 D10	Diode, LED, red 2.2V 20 mA40 mcd, clear, surface mount,0805		Dialight Corporation 598-81	10-107F
1 D11	Diode, LED, green, 3.1V 20 mA400 mcd, clear, surface mount,0805		QT-Brightek Corporation(QTB)	QBLP631-IG
1 D12	Diode, zener SMAZ5V1-13-F5.1V 1W DO-214AC_SMA		Diodes Incorporated SMAZ5V1-13-F
1 D13	Diode, rectifier,	1N4148 1.25V150 mA 100V SOD-123	Micro CommercialComponents Corp. (MCC)	1N4148W-TP
1 F1	Resistor, fuse, 2A 300 VAC,Slow, radial, TH P5.08D8.5H8		Littelfuse®	38312000000
1	IC1	IC MCP1012 SOIC-8	Microchip Technology Inc.	MCP1012-V/EKA
24	J1, J2, J3, J4,J5, J6, J7, TP1,TP2, TP3, TP4,TP5, TP6, TP7,TP8, TP9,TP10, TP11,TP12, TP13,TP14, TP15,TP16, TP17	Connector, header-2.54 male1x2 Gold 5.84 MH TH, vertical	Amphenol Commercial	77311-118-02LF
1 JP1 Mechanical, hardware, jumper,6.35 mm 1x2 D3087-98			Harwin Plc.	D3087-98
1	L1	Inductor, 100 μH 0.79A 20%,surface mount, L7.3W7.3H4.5	Wurth Electronik	744777920
1 LABEL1 Label, assembly with rev. level(small modules) per MTS-0002			—	—
1 L2	Inductor 1500 μH 810 mA10%, surface mount,L12.3W12.3H10		Coilcraft	MSS1210-155KEB
4	PAD1, PAD2,PAD3, PAD4	Mechanical, hardware, rubberpad, SQ, taper 0.50x0.50x0.23black	3M	SJ-5518
1	PCB1	MCP1012 DemonstrationBoard - printed circuit board	Microchip Technology Inc.	04-11027-R1
2 PIN1, PIN2 Connector, receptacle, 1pin AUH3185-05 THT			Harwin Plc.	H3185-05
1 Q1	Transistor FET N-ChannelIPD90R1K2C3ATMA1 900V5.1A 1.2R 83W TO-252-3		Infineon Technologies AG	IPD90R1K2C3ATMA1
1 R1	Resistor, TKF 1.5R 1% 1/3W,surface mount, 1210		Stackpole Electronics, Inc.	RMCF1210FT1R50
1 R2	Resistor, TF 10k	1% 1/16Wsurface mount, 0603	TE Connectivity	CPF0603F10KC1
2 R2A, R2B	Resistor, TKF 2R 5% 3/4W,surface mount, 2010		Panasonic - ECG	ERJ-12ZYJ2R0U
1 R3	Resistor, TKF 47	k 1% 1/8W,surface mount, 0805	Stackpole Electronics, Inc.	RMCF0805FT47K0
8 R4A	R5A, R6A,R7A, R8, R9,R10, R11	Resistor, TKF 2.29k 1% 1/4W,surface mount, 1206	Yageo Corporation RC1206	FR-072K49L
1 R12	Resistor, TKF 1	R 5% 1/8W,surface mount, 0805	Panasonic ERJ-6RQJ1R0V
2 R13	R30 Resistor,	TKF 10R 1% 1/8W,surface mount, 0805	ROHM Semiconductor MCR	10EZHF10R0
1 R14	A Resistor, TKF	1.5R 1% 1/8W,surface mount, 0805	TT Electronics ASC0805-1R5FT5
1 R14B	Resistor, TKF	1.6R 1% 1/8W,surface mount, 0805 AEC-Q200	Panasonic ERJ-6RQF1R6V
1 R15	Resistor, TKF 10	R 5% 1/4W,surface mount, 1206	Yageo Corporation AC1206	JR-0710RL
1 R16	Resistor, TF 0.0	05R 1% 1W,surface mount, 0612	Susumu Co., Ltd	PRL1632-R050-F-T1
2 R17A, R17B	Resistor, TKF 1R 1% 3/4W,surface mount, 2010		Vishay Dale	CRCW20101R00FKEF
1 R18	Resistor, TKF 3	30k 1% 1/8W,surface mount, 0805 AEC-Q200	Panasonic ERJ-6ENF3303V
2 R19, R27	Resistor, TKF 100k 5% 1/8W,surface mount, 0805		Panasonic	ERJ-6GEYJ104V
1 R20	Resistor, TKF 5	1R 5% 3/4W,surface mount, 2010	Panasonic	ERJ-12ZYJ510U
1 R21	Resistor, TKF 6	8R 5% 3/4W,surface mount, 2010	Panasonic	ERJ-12ZYJ680U
1 R22	Resistor, TKF 2	20R 5% 3/4W,surface mount, 2010	Panasonic	ERJ-12ZYJ221U
5 R24, R35A,R35B, R35C,R35D		Resistor, TKF 330R 5% 1/4W,surface mount, 1206	Panasonic	ERJ-8GEYJ331V
1 R26	Resistor, TKF 1	.5k 1% 1/8W,surface mount, 0805	Panasonic	ERJ-6ENF1501V
1 R28	Resistor, TKF 6	80R 1% 1/8W,surface mount, 0805	Stackpole Electronics, Inc	RMCF-1/10-680-1%
1 R29	Resistor, TKF 5	60R 1% 1/8W,surface mount, 0805	Stackpole Electronics, Inc	RMCF0805FT560R
1 R31	Resistor, TKF 1	8k 1% 1/8W,surface mount, 0805	Stackpole Electronics, Inc	RMCF-1/10-18K-1%
1 R32	Resistor, TKF 1	.3k 1% 1/8W,surface mount, 0805	Yageo Corporation RC0805	FR-071K3L
1 R33	Resistor, TKF 4	.7k 5% 1/8W,surface mount, 0805	Panasonic	ERJ-6GEYJ472V
1 R34	Resistor, TKF 5	.6k 1% 1/8W,surface mount, 0805	Vishay Dale	CRCW08055K60FKEA
1 SW1	Switch, DIP 4 SPST 24V100 mA 1-1825059-3, surfacemount		TE Connectivity	1-1825059-3
1 SW2	Switch, tact. S	PST 12V 50mA TL3302AF180QJ, surface mount	E-Switch®, Inc. TL3302AF180QJ
1 T2	Transistor, BJT,	PNP BC807-16L -45V -500 mA 225 mW SOT-23-3	ON Semiconductor®	BC807-16LT1G
1 TB1	Connector, terminal	5.08 mm 1x3 female 16-22AWG 10A TH R/A	Wurth Electronik 69141552	0003
1 TB2	Connector, terminal	3.5 mm 1x2 Female 24-16AWG 10A TH R/A	Wurth Electronik 69121411	0002
1 TB3, TB4	Connector, terminal	5 mm 1x2 female 12-26AWG 18A TH R/A	Phoenix Contact 1935161
1 TR1	Transistor, power	12:1 7.5V 200R14C, R14D mA 7.6 mH TH	Wurth Electronik 75031839	1
1 U1	Microchip MCU	8-Bit 16 MHz 918B 64B PIC10F322-I/OT SOT-23-6	Microchip Technology Inc.	PIC10F322-I/OT
1 U2	Microchip Analog	LDO ADJ MIC5235YM5-TR SOT-23-5	Microchip Technology Inc.	MIC5235YM5-TR
1 U4	IC Optoisolator	3.75 kV 5 Mb HCPL-2202-300E DIP-8 GW	Broadcom®	HCPL-2202-300E
1 U5	IC Power TLV43	1BSN1T1G Shunt Voltage Reference SOT23-3	ON Semiconductor	TLV431BSN1T1G

Note 1: The components listed in this Bill of Materials are representative of the PCB assembly. The released BOM used in manufacturing uses all RoHS-compliant components.

Table B-2: BILL OF MATERIALS (BOM - DO NOT POPULATE)

Qty.	Reference	Description	Manufacturer	Part Number
0 J8		Connector, Header-2.54 male1x6 gold 5.84 MH TH R/ADO NOT POPULATE	Amphenol Commercial	68016-106HLF
0	R4B, R5B,R6B, R7B	Resistor, TKF 0R surfacemount 1206DO NOT POPULATE	Yageo Corporation	RC1206JR-070RL
2 R14C, R14D		Resistor, TKF 0.1R 1% 1/8W,surface mount 0805DO NOT POPULATE	Panasonic - ECG	ERJ-L06KF10CV
0 R23		Resistor, TKF 220R 5% 3/4W,surface mount, 2010DO NOT POPULATE	Panasonic - ECG	ERJ-12ZYJ221U
0 R25		Resistor, TKF 390R 5% 1/8W,surface mount, 0805DO NOT POPULATE	Panasonic - ECG	ERJ-6GEYJ391V

Note 1: The components listed in this Bill of Materials are representative of the PCB assembly. The released BOM used in manufacturing uses all RoHS-compliant components.

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