MCP1650DM-LED1 - MICROCHIP

 2004 Microchip Technology Inc. DS51513A

MCP165X 3W White LED

Demo Board (Rev. 1)

User’s Guide

DS51513A-page ii  2004 Microchip Technology Inc.

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MCP165X 3W WHITE LED
DEMO BOARD USER’S GUIDE
 2004 Microchip Technology Inc. DS51513A-page iii
Table of Contents
Preface ...........................................................................................................................1
Chapter 1. Product Overview........................................................................................5
1.1 Introduction ...............................................................................................5
1.2 Evaluation Board Description ................................................................... 5
1.3  How it is used  ........................................................................................... 7
1.4 How it works ............................................................................................. 8
Appendix A. Schematic and Board Layouts ...............................................................9
A.1 Introduction ...............................................................................................9
A.2 Board Schematic  .................................................................................. 10
A.3 Top Silk-Screen  ....................................................................................11
A.4  Top Metal Layer  ......... ......... .. ......... .. ......... .. ......... ......... .. ......... .. ......... ..12
A.5  Bottom Silk-Screen Layer (Top View)  ...................................................13
A.6 Bottom Metal Layer  ............................................................................... 14
Appendix B. Bill-of-Materials (BOM)  .........................................................................15
Worldwide Sales and Service  ....................................................................................16

MCP165X 3W White LED Demo Board User’s Guide

DS51513A-page iv  2004 Microchip Technology Inc.

NOTES:

MCP165X 3W WHITE LED

DEMO BOARD USER’S GUIDE

 2004 Microchip Technology Inc. DS51513A-page 1

Preface

INTRODUCTION

This chapter contains general information that will be useful to know before using the

MCP165X 3W White LED Demo Board (Rev. 1). Items discussed in this chapter

include:

• Ab out This Gui de

• Recommended Reading

• The Microchip Web Site

• Customer Support

ABOUT THIS GUIDE

Document Layout

This document describes how to use MCP165X 3W White LED Demo Board (Rev. 1)

as a development tool to emulate and debug firmware on a target board. The manual

layout is as follows:

• Chap ter 1: MCP165X 3W Wh ite LED Demo Board (Rev. 1) - Describes how to

use the various features of the MCP165X 3W White LED Demo Board (Rev. 1).

•Appendix A: Schematic and Board Layouts – Shows the schematic and

Printed Circuit Board (PCB) layout diagrams for the MCP165X 3W White LED

Demo Board (Rev. 1).

•Appendix B: Bill-of-Materials (BOM) – Shows the parts used to build the

MCP165X 3W White LED Demo Board (Rev. 1).

NOTICE TO CUSTO MERS

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 descrip tions 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 “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

on-line help. Select the Help menu, and then Topics to open a list of available on-l ine

help files.

MCP165X 3W White LED Demo Board User’s Guide

DS51513A-page 2  2004 Microchip Technology Inc.

Conventions Used in this Guide

This manu al us es the followi ng docum entatio n conv en tion s:

RECOMMENDED READING

This user's guide describes how to use MCP165X 3W White LED Demo Board (Rev.

1). Other useful documents are listed below. The following Microchip documents are

available and recommended as supplemental reference resources.

MCP1650 750 kHz Boost Controller Data Sheet (DS21876)

The data sheet provides detailed information regarding the MCP1650/51/52/53 family

of boost contro ll er s.

DOCUMENTATION CONVENTIONS

Description Represents Examples

Arial font:

Italic char acters Referenced books MPLAB® IDE User’s Guide

Emphasized text ...is the only co mp ile r...

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 “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

‘bnnnn A binary number where n is a

digit ‘b00100, ‘b10

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

Courie r font:

Plain Courier Sample source code #define START

Filenames autoexec.bat

File paths c:\mcc18\h

Keywords _asm, _endasm, static

Command-line options -Opa+, -Opa-

Bit values 0, 1

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

any val id filena me

0xnnnn A hex adecimal number w here

n is a hexadecimal digit 0xFFFF, 0x007A

Square brackets [ ] Optional arguments mcc18 [options] file

[options]

Curly brackets and pipe

character: { | } Choice of mutually exclu s ive

arguments; an OR selection errorlevel {0|1}

Ellipses... Replaces repeated text var_name [,

var_name...]

Represents code supplied by

user void main (void)

{ ...

}

Preface

 2004 Microchip Technology Inc. DS51513A-page 3

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,

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•General Technical Support – Frequently Asked Questions (FAQ), technical

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member listing

•Business of Microchip – Product selector and ordering guides, latest Microchip

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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

• Development Systems Information Line

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://support.microchip.com

In addition, there is a Development Systems Information Line which lists the latest

versions of Microchip's development systems software products. This line also

provides information on how customers can receive currently available upgrade kits.

The Development Systems Information Line numbers are:

1-800-755-2345 – United States and most of Canada

1-480- 792-73 02 – Othe r Interna tional Loca tio ns

MCP165X 3W White LED Demo Board User’s Guide

DS51513A-page 4  2004 Microchip Technology Inc.

NOTES:

MCP165X 3W WHITE LED

DEMO BOARD USER’S GUIDE

 2004 Microchip Technology Inc. DS51513A-page 5

Chapter 1. Product Overview

1.1 INTRODUCTION

The MCP1650/1/2/3 Boost Controller family is a 750 kHz gated oscillator controller in

an 8 or 10-pin MSOP package. The family includes peak current limit, adjustable output

voltage/current, low battery detection and power good indication.

This board uses Microchip Technology’s MCP1650/1/2/3 boost controller as a

constant-current source to drive a 3W white LED. The application features the

MCP1651R-option (8-pin MSOP) with the low-battery detect feature. The input voltage

for the MCP165X 3W White LED Demo Board is 2.0V to 4.5V and the output current is

set at 700 mA.

1.2 EVALUATION BOARD DESCRIPTION

The MCP165X 3W White LED Demo Board is fully assembled, tested and ready for

evaluation and demonstration. This board is capable of functioning without any extra

lab supplies or loads. A three-socket AA battery holder is attached to the board. How-

ever, there are terminals provided to allow the use of an external voltage supply. The

input is fused for overcurrent protection.

If an external voltage supply is used, the MCP165X 3W White LED Demo Board

requires 2.0V to 4.5V for proper operation. Connect the positive terminal of the external

supply to TP1 and the ground terminal of the external supply to TP2. Care must be

taken so that the input voltage does not exceed the maximum voltage rating of 6.0V

that is specified in the MCP1650/1/2/3 data sheet (DS21876). The MCP1651R is the

specific device used on the board.

There are two switches on the board. Switch S1 is an on/off switch used to disconnect

the input voltage. Switch S2 is a momentary switch that triggers the PIC10F206

microcontroller to activate the Demonstration mode or the Flashing mode.

Section 1.3 “How it is used” describes how to put the MCP165X 3W White LED

Demo Board in the dif ferent modes of operation. The flowchart in Figure 1-1 shows the

sequence of events triggered by pressing the momentary switch.

The Flashing mode consists of three different operating states for the LED. The bright-

ness of the LED is approximately 50% dimmed in the first state. This is accomplished

by applying a 50% square wave to the shutdown pin of the MCP1651R. The second

and third states of operation consist of flashing the LED at two different rates. The

second state is a fast flash rate, while the third state is a slow flash rate. These rates

of flash are predetermined and are accomplished by toggling the shutdown pin with a

square wav e.

The Demonstration mode automatically cycles through the three flashing modes.

MCP165X 3W White LED Demo Board User’s Guide

DS51513A-page 6  2004 Microchip Technology Inc.

The MCP1651R has a low input voltage status indicator that will provide visual

indication (via a red LED) when the input voltage is approaching 2.8V.

FIGURE 1-1: MCP165X 3W White LED Demo Board Flow Chart

Power-Up LED @ Full Power

Constantly On

Switch

Pressed

for 2 sec?

LED Dimmed by ~50%

by Toggling SHDN

LED Flashing @

Fast Rate

LED Flashing @

Slow Rate

Automatically

Run Through

Demo

Yes

Switch

Pressed

for 2 sec?

Switch

Pressed

for 2 sec?

Switch

Pressed

for 2 sec?

Product Ov er v ie w

 2004 Microchip Technology Inc. DS51513A-page 7

1.3 HOW IT IS USED

1.3.1 S tandard Operation

1. Verify that the on/off switch S1 is in the off position.

2. Insert three fully-charged batteries into the battery holder. The combined voltage

of the three batteries can not exceed 6.0V. The recommended range of the input

voltage is 2.0V to 4.5V.

3. Move the S1 switch to the on position. The 3W white LED should now be

powered.

1.3.2 Demonstration Mod e Operation

As described in Section 1.2 “Evaluation Board Description”, the MCP165X 3W

White LED Demo Board can be set into a demonstration mode of operation. The

following procedure describes how to initiate the demonstration mode.

1. Refer to Sectio n 1.3 .1 “St andar d Opera tion” to verify the proper connection of

the input voltage supply.

2. Move the S1 switch to the ON position. The LED should be powered.

3. Press and hold the momentary switch S2. Relea se the s witch af ter a m inimum of

two seconds. The MCP165X 3W White LED Demo Board will enter the

Demonstration mode. Once the Demonstration mode is complete, the LED will

be powered at full brightness.

1.3.3 Flashing Mode Operation

1. Refer to Sectio n 1.3 .1 “St andar d Opera tion” to verify the proper connection of

the input voltage supply.

2. Move the S1 switch to the on position. The LED should be powered.

3. Press and release the momentary switch S2. The 3W LED will now be in a

dimmed state and stay in this state until the momentary switch is pressed again.

4. Press and release the momentary switch S2 again. The 3W LED will now begin

to flash at a predetermined rate.

5. Press and release the momentary switch S2 again. The 3W LED will now begin

to flash slower predetermined rate.

6. Press and release the momentary switch S2 again. The 3W LED will return to full

brightness.

Note 1: Alternately, the input voltage can be provided by a lab power supply.

Apply a 2.0V to 4.5V supply voltage to the VIN (TP1) pin and the GND

(TP2) pin.

2: Before connecting a lab power supply, remove any batteries from the

battery holder located on the bottom of the board.

Note: See Sec tion 1.2 “Evaluation Board Description” for a description of the

brightness and flashing sequences preprogrammed into the on-board

PIC10F206.

Note: Anytime the momentary switch S2 is pressed for more than two seconds ,

the MCP165X 3W White LED Demo Board will enter the Demonstration

mode of operation.

MCP165X 3W White LED Demo Board User’s Guide

DS51513A-page 8  2004 Microchip Technology Inc.

1.4 HOW IT WORKS

1.4.1 MCP1650/1/2/3 Functi ons

The MCP1650/1/2/3 product family consists of four high-frequency, boost converter

devices having dif ferent combinations of features. All devices in the family feature

750 kHz high-frequency , low quiescent current, shutdown compatibility and the MSOP

package. The MCP1650 is the base device in an 8-pin MSOP package. The MCP1651

includes all of the features of the MCP1650, with the addition of a low-battery detect

and a low-battery output indicator. The MCP1652 includes all of the features of the

MCP1650, with the addition of a power good indicator. The MCP1653 has all the

features of the MCP1650/1/2 and is offered in a 10-pin MSOP package.

1.4.2 Power Topology and Output Regulation

The topology used to convert the wide ranging input voltage into a regulated output

voltage is the SEPIC topology . This topology allows the input voltage to be stepped-up

or stepped-down and provides protection if the switching FET fails.

The output current is regulated by using a sense resistor to change the white LED

current into a voltage. This voltage is then fed into the voltage reference pin on the

MCP1651R. Please refer to the MCP1650/1/2/3 data sheet (DS21876) for more

information regarding output regulation.

MCP165X 3W WHITE LED

DEMO BOARD USER’S GUIDE

 2004 Microchip Technology Inc. DS51513A-page 9

Appendix A. Schematic and Board Layouts

A.1 INTRODUCTION

This appendix contains the schematic and printed circuit board (PCB) layout diagrams

for the MCP165X 3W White LED Evaluation Board (Rev. 1).

The MCP165X 3W White LED Evaluation Board (Rev. 1) is constructed using a

two-layer printed circuit board. The top and bottom layers are for components and

traces.

Diagrams inclu ded in thi s appe ndi x:

• Board Sc hematic

• Top Silk-screen Layer

• Top Metal Layer

• Bottom Silk-screen Layer

• Bottom Metal Layer

MCP165X 3W White LED Demo Board User’s Guide

DS51513A-page 10  2004 Microchip Technology Inc.

A.2 BOARD SCHEMATIC

Schematic and Board Layouts

 2004 Microchip Technology Inc. DS51513A-page 11

A.3 TOP SILK-SCREEN

MCP165X 3W White LED Demo Board User’s Guide

DS51513A-page 12  2004 Microchip Technology Inc.

A.4 TOP METAL LAYER

Schematic and Board Layouts

 2004 Microchip Technology Inc. DS51513A-page 13

A.5 BOTTOM SILK-SCREEN LAYER (TOP VIEW)

MCP165X 3W White LED Demo Board User’s Guide

DS51513A-page 14  2004 Microchip Technology Inc.

A.6 BOTTOM METAL LAYER

MCP165X 3W WHITE LED

DEMO BOARD USER’S GUIDE

 2004 Microchip Technology Inc. DS51513A-page 15

Appendix B. Bill-of-Materials (BOM)

TABLE B-1: BILL-OF-MATERIALS (BOM)

Qty Referenc e Descripti on Manufac tur er Part Number

1 Battery Holder 3 AA holder Keystone Electronics®2464

1 S1 ON/OFF Switch E-Switch Inc. EG1903

1 S2 Momentary Switch E-Switch Inc. TL3301NF260QG

1 F1 Polyswitch Reset Fuse Raychem® Corp. MINISMDC200-2

5 TP1, TP2, TP3, TP4,

TP5 SMT Test Point Keystone Elec tron ic s 5016

1 C1 Capacitor, 10 µF, 1210 Kemet®C1210C106K8PACTU

1 C2 Capacitor, 1.0 µF, 0603 Panasonic® - ECG ECJ-1VB1C105K

1 C3 Capacitor, 0.82 µF, 0805 Panasonic - ECG ECJ-2YB1A824K

1 C4 Capacitor, 47 µF, 1210 muRata®GJ232CF50J476ZD01K

1 C5 Capacitor, 4.7 µ F, 0603 Panasonic - ECG ECJ-1VB0J475M

1 R1 Res ist or, 100Ω, 0603 Panasonic - ECG ERJ-3EKF1000V

1 R2 Res ist or, 2.49 kΩ, 0603 Panasonic - ECG ERJ-3EKF2491V

1 R3 Res ist or, 750Ω, 0603 Panasonic - ECG ERJ-3EKF7500V

1 R4 Res ist or, 0.27Ω, 1206 Panasonic - ECG ERJ-8RQFR27V

1 R5 Res ist or, 0.10Ω, 0603 Panasonic - ECG ERJ-3RSJR10V

2 R6, R9 Resistor, 47.5 kΩ, 0603 Panasonic - ECG ERJ-3EKF4752V

1 R7 Resistor , 0Ω, 0603 Panasonic - ECG ERJ-3GEY0R00V

1 R8 Res ist or, 562Ω, 0603 Panasonic - ECG ERJ-3EKF5620V

2 R10, R12 Resistor, 100 kΩ, 0603 Panasonic - ECG ERJ-3EKF1003V

1 R11 Resist or, 82.5 kΩ, 0603 Panasonic - ECG ERJ-3EKF8252V

1 D1 Sch ottk y D iod e ON Semico nduct or ®MBRA130LT3

1 D2 Schottky Diode Panasonic - ECG MBRA130LT3

1 D3 Luxeon III LED Lumileds®LXHL-LW3C

1 D4 Red LED, 0805 Lumex®

Opto/Components Inc. SML-LX0805SIC-TR

2 L1, L2 3.3 µH Inductor Coilcraft®DO3316P-332

1 Q1 N Channel MOSFET Fairchild®

Semiconductor FDN337N

1 U2 PIC10F206 6-pin SOT-23 Microchip

Technology Inc. PIC10F206

1 U3 MCP1651 8-pin MSOP Microchip

Technology Inc. MCP1651R

1 J1 CONN HEADER VERT

5POS .100 TIN AMP 640454-5

1 HS1 Heat sin k International Electro nic

Research Corp. BDN09-3CB/A01

DS51513A-page 16  2004 Microchip Technology Inc.

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WORLDWIDE SALES AND SERVICE

09/27/04