Microchip Technology DN2470 User Manual

DN2470 Based Linear Regulator

Input Voltage Range Extender

Evaluation Board User’s Guide

 2016 Microchip Technology Inc. DS50002464A

Note the following details of the code protection feature on Microchip devices:

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== ISO/TS 16949 ==

• Microchip products meet the specification contained in their particular Microchip Data Sheet.

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intended manner and under normal conditions.

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knowledge, require using the Microchip products in a manner outside the operating specifications contained in Microchip’s Data
Sheets. Most likely, the person doing so is engaged in theft of intellectual property.

• Microchip is willing to work with the customer who is concerned about the integrity of their code.

• Neither Microchip nor any other semiconductor manufacturer can guarantee the security of their code. Code protection does not
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Code protection is constantly evolving. We at Microchip are committed to continuously improving the code protection features of our
products. Attempts to break Microchip’s code protection feature may be a violation of the Digital Millennium Copyright Act. If such acts
allow unauthorized access to your software or other copyrighted work, you may have a right to sue for relief under that Act.

Information contained in this publication regarding device
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and may be superseded by updates. It is your responsibility to
ensure that your application meets with your specifications.
MICROCHIP MAKES NO REPRESENTATIONS OR
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®

MCUs and dsPIC® DSCs, KEELOQ

®

code hopping

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K
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All other trademarks mentioned herein are property of their
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© 2016, Microchip Technology Incorporated, Printed in the
U.S.A., All Rights Reserved.

ISBN: 978-1-5224-0358-6

EELOQ,

DS50002464A-page 2  2016 Microchip Technology Inc.

Object of Declaration: DN2470 Based Linear Regulator Input Voltage Range Extender
Evaluation Board

 2016 Microchip Technology Inc. DS50002464A-page 3

NOTES:

DS50002464A-page 4  2016 Microchip Technology Inc.

DN2470 BASED LINEAR REGULATOR

INPUT VOLTAGE RANGE EXTENDER

EVALUATION BOARD USER’S GUIDE

Table of Contents

Preface ........................................................................................................................... 6

Introduction............................................................................................................ 6

Document Layout .................................................................................................. 6

Conventions Used in this Guide ............................................................................ 7

Recommended Reading........................................................................................ 8

The Microchip Web Site ........................................................................................ 8

Customer Support ................................................................................................. 8

Document Revision History ................................................................................... 8

Chapter 1. Product Overview

1.1 Introduction ..................................................................................................... 9

1.2 DN2470 Device Overview .............................................................................. 9

1.3 What is the DN2470 Based Linear Regulator Input Voltage

Range Extender Evaluation Board? ......................................................... 9

1.4 What the DN2470 Based Linear Regulator Input Voltage

Range Extender Evaluation Board Kit Contains ..................................... 10

Chapter 2. Installation and Operation

2.1 Getting Started ............................................................................................. 11

2.2 Setup and Operation Procedure ................................................................... 11

Appendix A. Schematic and Layouts

A.1 Introduction .................................................................................................. 13

A.2 Board – Schematic ....................................................................................... 14

A.3 Board – Top Silk .......................................................................................... 15

A.4 Board – Top Copper and Silk ....................................................................... 16

A.5 Board – Top Copper .................................................................................... 17

A.6 Board – Bottom Copper ............................................................................... 18

Appendix B. Bill of Materials (BOM)........................................................................... 19

Appendix C. DN2470 Characterization Plots

C.1 Heat Sink ..................................................................................................... 21

C.2 Pad Temperature ......................................................................................... 21

C.3 Overtemperature Protection Using PTC ...................................................... 22

Worldwide Sales and Service .................................................................................... 24

 2016 Microchip Technology Inc. DS50002464A-page 5

DN2470 Based Linear Regulator Input Voltage Range Extender Evaluation Board User’s Guide

NOTES:

DS50002464A-page 6  2016 Microchip Technology Inc.

DN2470 BASED LINEAR REGULATOR

INPUT VOLTAGE RANGE EXTENDER

EVALUATION BOARD USER’S GUIDE

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 web site
(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
“DSXXXXXXXXA”, where “XXXXXXXX” 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
Select the Help menu, and then Topics to open a list of available online help files.

®

IDE online help.

INTRODUCTION

This chapter contains general information that will be useful to know before using the
DN2470 Based Linear Regulator Input Voltage Range Extender Evaluation Board
User’s Guide. Items discussed in this chapter include:

• Document Layout

• Conventions Used in this Guide

• Recommended Reading

• The Microchip Web Site

• Customer Support

• Document Revision History

DOCUMENT LAYOUT

This document describes how to use the DN2470 Based Linear Regulator Input
Voltage Range Extender Evaluation Board User’s Guide as a development tool.

• Chapter 1. “Product Overview” – Important information about the DN2470

Based Linear Regulator Input Voltage Range Extender Evaluation Board User’s
Guide.

• Chapter 2. “Installation and Operation” – This chapter includes a detailed

description of each function of the demonstration board and instructions on how to
use the board.

• Appendix A. “Schematic and Layouts” – Shows the schematic and layout

diagrams for the DN2470 Based Linear Regulator Input Voltage Range Extender
Evaluation Board User’s Guide.

• Appendix B. “Bill of Materials (BOM)” – Lists the parts used to build the

DN2470 Based Linear Regulator Input Voltage Range Extender Evaluation Board
User’s Guide.

• Appendix C. “DN2470 Characterization Plots” – Describes the various plots

and waveforms for the DN2470 Based Linear Regulator Input Voltage Range
Extender Evaluation Board User’s Guide.

 2016 Microchip Technology Inc. DS50002464A-page 7

DN2470 Based Linear Regulator Input Voltage Range Extender Evaluation Board User’s Guide

CONVENTIONS USED IN THIS GUIDE

This manual uses the following documentation conventions:

DOCUMENTATION CONVENTIONS

Description Represents Examples

Arial font:

Italic characters Referenced books MPLAB

Emphasized text ...is the only compiler...

Initial caps A window the Output window

A dialog the Settings dialog
A menu selection select Enable Programmer

Quotes A field name in a window or

dialog

Underlined, italic text with
right angle bracket

Bold characters A dialog button Click OK

N‘Rnnnn A number in verilog format,

Text in angle brackets < > A key on the keyboard Press <Enter>, <F1>

Courier New font:

Plain Courier New Sample source code #define START

Italic Courier New A variable argument file.o, where file can be

Square brackets [ ] Optional arguments mcc18 [options] file

Curly brackets and pipe
character: { | }

Ellipses... Replaces repeated text var_name [,

A menu path File>Save

A tab Click the Power tab

where N is the total number of
digits, R is the radix and n is a
digit.

Filenames autoexec.bat
File paths c:\mcc18\h
Keywords _asm, _endasm, static
Command-line options -Opa+, -Opa-
Bit values 0, 1
Constants 0xFF, ‘A’

Choice of mutually exclusive
arguments; an OR selection

Represents code supplied by
user

“Save project before build”

4‘b0010, 2‘hF1

any valid filename

[options]

errorlevel {0|1}

var_name...]

void main (void)
{ ...
}

®

IDE User’s Guide

DS50002464A-page 8  2016 Microchip Technology Inc.

RECOMMENDED READING

This user’s guide describes how to use the DN2470 Based Linear Regulator Input
Voltage Range Extender Evaluation Board User’s Guide. Other useful documents are
listed below. The following Microchip documents are available and recommended as
supplemental reference resources.

DN2470 Data Sheet – “N-Channel, Depletion-Mode, Vertical DMOS FET”
(DS20005410)

MCP1754 Data Sheet – “150 mA,16V, High-Performance LDO” (DS20002276)

MCP1755 Data Sheet – “300 mA,16V, High-Performance LDO” (DS25160)

MCP1790 Data Sheet – “70 mA, High Voltage Regulator” (DS20002075)

THE MICROCHIP WEB SITE

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

Preface

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 web site at:

http://www.microchip.com/support

DOCUMENT REVISION HISTORY

Revision A (March 2016)

• Initial release of this document.

 2016 Microchip Technology Inc. DS50002464A-page 9

DN2470 BASED LINEAR REGULATOR

INPUT VOLTAGE RANGE EXTENDER

EVALUATION BOARD USER’S GUIDE

Chapter 1. Product Overview

1.1 INTRODUCTION

This chapter provides an overview of the DN2470 Based Linear Regulator Input
Voltage Range Extender Evaluation Board and covers the following topics:

• DN2470 Device Overview

• What is the DN2470 Based Linear Regulator Input Voltage Range Extender
Evaluation Board?

• What the DN2470 Based Linear Regulator Input Voltage Range Extender
Evaluation Board Kit Contains

1.2 DN2470 DEVICE OVERVIEW

The DN2470 is a low-threshold depletion-mode (normally-on) vertical FET. Vertical
DMOS FETs are suited for a wide range of switching and amplifying applications where
high breakdown voltage, high input impedance, low input capacitance and fast
switching speeds are required.

The DN2470 has a 700V voltage breakdown with a 42 ohms drain-to-source On-state
resistance and 500 mA saturated drain-to-source current when operating over typical
conditions. The device is packaged in a TO-252 (D-PAK) and it is designed to operate
in a temperature range of -55°C to +150°C (refer to the DN2470 data sheet for more
information).

1.3 WHAT IS THE DN2470 BASED LINEAR REGULATOR INPUT VOLTAGE RANGE EXTENDER EVALUATION BOARD?

The DN2470 Based Linear Regulator Input Voltage Range Extender Evaluation Board
presents the universal off-line linear regulation using the 700V depletion-mode FET
DN2470. The board features off-line regulation using three different selectable LDOs:
MCP1754, MCP1755 and MCP1790, offered in various package options. The
evaluation board operates with 50 Hz 230 VAC or 60 Hz 120 VAC AC lines and
sources 10 mA typical output current (LDO’s output current).

 2016 Microchip Technology Inc. DS50002464A-page 10

Figure 1-1 presents the evaluation board block diagram.

AC

ȍ

2W

RL

1 uF

LDOs

Nȍ

DN2470

7.5V

1 uF

450 V

PTC

100

MOV

387V

4.5 KA

1 uF

FIGURE 1-1: DN2470 Evaluation Board Block Diagram.

1.3.1 Evaluation Board Features

Product Overview

• 120 and 230 VAC Off-line Regulation

• Typical Output Current of 10 mA

• Maximum Output Current Thermally Limited

• Transient Survivability of 2.5 kV

• Overtemperature Protection; Typically +105°C

• Output Voltage Range of 3-5V

• Three Different Selectable LDOs:

- MCP1754 (3.3V)

- MCP1755 (5.0V)

- MCP1790 (3.0V)

1.4 WHAT THE DN2470 BASED LINEAR REGULATOR INPUT VOLTAGE RANGE EXTENDER EVALUATION BOARD KIT CONTAINS

The DN2470 Based Linear Regulator Input Voltage Range Extender Evaluation Board
kit includes:

• DN2470 Based Linear Regulator Input Voltage Range Extender Evaluation Board
User’s Guide (ADM00682)

• Important Information Sheet

 2016 Microchip Technology Inc. DS50002464A-page 11

DN2470 Based Linear Regulator Input Voltage Range Extender Evaluation Board User’s Guide

NOTES:

DS50002464A-page 12  2016 Microchip Technology Inc.

DN2470 BASED LINEAR REGULATOR

INPUT VOLTAGE RANGE EXTENDER

EVALUATION BOARD USER’S GUIDE

Chapter 2. Installation and Operation

2.1 GETTING STARTED

The DN2470 Based Linear Regulator Input Voltage Range Extender Evaluation Board
is fully assembled and tested.

2.1.1 Tools Required for Operation

The tools required for operation include:

• AC Line connection or DC power supply

• An oscilloscope and/or a multimeter to observe the waveforms and measure elec­trical parameters

2.2 SETUP AND OPERATION PROCEDURE

To prepare the DN2470 Based Linear Regulator Input Voltage Range Extender
Evaluation Board for operation, the steps below must be followed carefully.

WARNING

Before beginning board setup, fully read this document, the DN2470 Based Linear
Regulator Input Voltage Range Extender Evaluation Board User’s Guide.

CAUTION

Hazardous voltages are present when connected to AC Lines.

1. Select an LDO by placing a jumper on J3 connector. If VIN1 or VIN2 are selected,

must be shorted to VIN (J5 or J7).

SHDN

2. Connect a Load if needed at VOUT.

3. Connect the AC Line (120 or 230 VAC) or DC power supply to J1.

Note: Do not touch exposed areas when operating the board. Avoid touching the

heat sink, the drain-exposed pad or the input resistor.

Selecting Different LDO

To select a different LDO, the AC Line or DC power supply has to be removed first.

 2016 Microchip Technology Inc. DS50002464A-page 13

DN2470 Based Linear Regulator Input Voltage Range Extender Evaluation Board User’s Guide

AC

LDO
Selection

FIGURE 2-1: DN2470 Based Linear Regulator Input Voltage Range Extender Evaluation Board.

DS50002464A-page 14  2016 Microchip Technology Inc.

Appendix A. Schematic and Layouts

A.1 INTRODUCTION

This appendix contains the following schematics and layouts for of the DN2470 Based
Linear Regulator Input Voltage Range Extender Evaluation Board:

• Board – Schematic

• Board – Top Silk

• Board – Top Copper and Silk

• Board – Top Copper

• Board – Bottom Copper

DN2470 BASED LINEAR REGULATOR

INPUT VOLTAGE RANGE EXTENDER

EVALUATION BOARD USER’S GUIDE

 2016 Microchip Technology Inc. DS50002464A-page 15

DS50002464A-page 16  2016 Microchip Technology Inc.

U1
Rectifier

GND

Q1

DN2470

GND

GND

GND

GND

GND

GND

SOT-223-3

DFN 2x3mm

SOT-23-5

GND

VOUT

1

PWRGD

2

NC

3

GND

4

SHDN

5

VOU

WRG

C

VIN

8

NC

6

NC

7

EP

9

U3

VOUT

3

VOU

1

GND

2

U4

VOUT

5

PWRGD

4

GND

2

SHDN

3

VOU

WRG

VIN

1

U2

1
234

5
6

J3

H1

1uF

450V

C1

1

2

J1

CONN-Terminal

100k
0805

5%

R2

GND

U5

MOV-Varistor 387 V 4.5 kA

1
2
3

1

1

2
3

J7

1uF
16V
0805

C2

1uF
16V
0805

C4

1uF
16V
0805

C6

1uF
16V
0805

C3

1uF
16V

0805

C5

1uF
16V
0805

C7

12

12

J11

12

J2

GND

GND

AC IN

VOUT1

VOUT2

VOUT3

1

J4

1

J6

7.5V

D1

R1

68 ohms

2W

R3

Thermistor-100 PTC

HS1 Heat Sink

VIN

1x2

J5

MCP1755

MCP1754

MCP1790

J10

DN2470 Based Linear Regulator Input Voltage Range Extender Evaluation Board User’s Guide

A.2 BOARD – SCHEMATIC

GND

ND

N

GND

A.3 BOARD – TOP SILK

Schematic and Layouts

 2016 Microchip Technology Inc. DS50002464A-page 17

DN2470 Based Linear Regulator Input Voltage Range Extender Evaluation Board User’s Guide

A.4 BOARD – TOP COPPER AND SILK

DS50002464A-page 18  2016 Microchip Technology Inc.

A.5 BOARD – TOP COPPER

Schematic and Layouts

 2016 Microchip Technology Inc. DS50002464A-page 19

DN2470 Based Linear Regulator Input Voltage Range Extender Evaluation Board User’s Guide

A.6 BOARD – BOTTOM COPPER

DS50002464A-page 20  2016 Microchip Technology Inc.

DN2470 BASED LINEAR REGULATOR

INPUT VOLTAGE RANGE EXTENDER

EVALUATION BOARD USER’S GUIDE

Appendix B. Bill of Materials (BOM)

TABLE B-1: BILL OF MATERIALS (BOM)

Qty. Reference Description Manufacturer Part Number

1 C1 Capacitor 1 µF 450V Rubycon Corporation 450PX1MEFC6.3X11

6 C2, C3, C4,

C5, C6, C7

1 D1 Zener Diode 7.5V Diodes Incorporated

1 H1 HS1 Heat Sink Aavid Thermalloy 573100D00000G

1 J1 Connector Terminal 1X2 PHOENIX CONTACT 1933189

3 J2, J10, J11 2 Pos. Header Connector Molex

1 J3 6 Pos. Dual Connector Samtec Inc TSW-103-08-L-D

2 J4, J6 1 Pos. Header Connector -

2 J5, J7 3 Pos. Header Connector Samtec, Inc. TSW-103-07-T-S

4 N/A Hex Standoff 4-40 Nylon 1/2 Keystone Electronics Corp. 4802

4 N/A Hex Nut 1/4" Nylon Keystone Electronics Corp. 9605

1 N/A (Mounts

on J1)

1 PCB DN2470 Based Linear Regulator Input

1 Q1 DN2470 Microchip Technology Inc. DN2470K4-G

1 R1 68 Ohms 2W TT Electronics Plc. ULW2-68RJA25

1 R2 Resistor 100k Yageo Corporation RC0805JR-07100KL

1 R3 Thermistor-100 PTC Murata Electronics North

1 U1 Rectifier 0.5A 400V Micro Commercial

1 U2 MCP1755 Microchip Techonology Inc. MCP1755T-3302E/OT

1 U3 MCP1754 Microchip Techonology Inc. MCP1754-5002E/MC

1 U4 MCP1790 Microchip Techonology Inc. MCP1790-3002E/DB

1 U5 Varistor 387V 4.5kA -14 mm Disc Bourns, Inc. MOV-14D431K

Note 1: The components listed in this Bill of Materials are representative of the PCB assembly. The released BOM

Capacitor, 1 µF 16V Kemet C0805C105K4RACTU

®

®

TE Connectivity Ltd. 5-146280-1

NOT INSTALLED

Terminal Block Plug 2 Pos. PHOENIX CONTACT 1934861

— 04-10446
Voltage Range Extender Evaluation
Board – Printed Circuit Board

America, Inc.

Components

used in manufacturing uses all RoHS-compliant components.

BZT52C7V5S-7-F

0022284020

PRG18BB101MB1RB

MB4S-TP

 2016 Microchip Technology Inc. DS50002464A-page 21

NOTES:

Bill of Materials (BOM)

 2016 Microchip Technology Inc. DS50002464A-page 22

Appendix C. DN2470 Characterization Plots

0

10

20

30

40

50

60

70

80

90

0 5 10 15 20

Temperature Rise Above

Ambient (°C)

Load Current (mA)

Linearized

120 VAC 60 Hz

230 VAC 50 Hz

Linearized

0

10

20

30

40

50

60

70

80

90

100

0 5 10 15 20

DN2470 Pad Temperature Rise

(°C)

Load Current (mA)

Linearized

120 VAC 60 Hz

230 VAC 50 Hz

Linearized

C.1 HEAT SINK

DN2470 BASED LINEAR REGULATOR

INPUT VOLTAGE RANGE EXTENDER

EVALUATION BOARD USER’S GUIDE

C.2 PAD TEMPERATURE

 2016 Microchip Technology Inc. DS50002464A-page 23

C.3 OVERTEMPERATURE PROTECTION USING PTC

0

0.5

1

1.5

2

2.5

3

3.5

0 50 100 150

LDO V

OUT

(V)

PTC Temperature (°C)

DN2470 Characterization Plots

 2015 Microchip Technology Inc. DS50002464A-page 24

NOTES:

DN2470 Characterization Plots

 2015 Microchip Technology Inc. DS50002464A-page 25

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Tel: [phone]
Fax: [phone] or
82-2-558-5934

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Philippines - Manila

Tel: [phone]
Fax: [phone]

Singapore

Tel: [phone]
Fax: [phone]

Taiwan - Hsin Chu

Tel: [phone]
Fax: [phone]

Taiwan - Kaohsiung

Tel: [phone]

Taiwan - Taipei

Tel: [phone]
Fax: [phone]

Thailand - Bangkok

Tel: [phone]
Fax: [phone]

EUROPE

Austria - Wels

Tel: [phone]
Fax: [phone]

Denmark - Copenhagen

Tel: [phone]
Fax: [phone]

France - Paris

Tel: [phone]
Fax: [phone]

Germany - Dusseldorf

Tel: [phone]

Germany - Karlsruhe

Tel: [phone]

Germany - Munich

Tel: [phone]
Fax: [phone]

Italy - Milan

Tel: [phone]
Fax: [phone]

Italy - Venice

Tel: [phone]

Netherlands - Drunen

Tel: [phone]
Fax: [phone]

Poland - Warsaw

Tel: [phone]

Spain - Madrid

Tel: [phone]
Fax: [phone]

Sweden - Stockholm

Tel: [phone]

UK - Wokingham

Tel: [phone]
Fax: [phone]

07/14/15

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