Microchip Technology MIC4802 User Manual
MIC4802
Evaluation Board
User’s Guide
2018 Microchip Technology Inc. DS-50002780A
Note the following details of the code protection feature on Microchip devices:
YSTEM
CERTIFIED BY DNV
== ISO/TS 16949 ==
• Microchip products meet the specification contained in their particular Microchip Data Sheet.
• Microchip believes that its family of products is one of the most secure families of its kind on the market today, when used in the
intended manner and under normal conditions.
• There are dishonest and possibly illegal methods used to breach the code protection feature. All of these methods, to our
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
mean that we are guaranteeing the product as “unbreakable.”
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
applications and the like is provided only for your convenience
and may be superseded by updates. It is your responsibility to
ensure that your application meets with your specifications.
MICROCHIP MAKES NO REPRESENTATIONS OR
WARRANTIES OF ANY KIND WHETHER EXPRESS OR
IMPLIED, WRITTEN OR ORAL, STATUTORY OR
OTHERWISE, RELATED TO THE INFORMATION,
INCLUDING BUT NOT LIMITED TO ITS CONDITION,
QUALITY, PERFORMANCE, MERCHANTABILITY OR
FITNESS FOR PURPOSE. Microchip disclaims all liability
arising from this information and its use. Use of Microchip
devices in life support and/or safety applications is entirely at
the buyer’s risk, and the buyer agrees to defend, indemnify and
hold harmless Microchip from any and all damages, claims,
suits, or expenses resulting from such use. No licenses are
conveyed, implicitly or otherwise, under any Microchip
intellectual property rights unless otherwise stated.
Microchip received ISO/TS-16949:2009 certification for its worldwide
headquarters, design and wafer fabrication facilities in Chandler and
Tempe, Arizona; Gresham, Oregon and design centers in California
and India. The Company’s quality system processes and procedures
are for its PIC
devices, Serial EEPROMs, microperipherals, nonvolatile memory and
analog products. In addition, Microchip’s quality system for the design
and manufacture of development systems is ISO 9001:2000 certified.
®
MCUs and dsPIC® DSCs, KEELOQ
®
code hopping
QUALITY MANAGEMENT S
Trademarks
The Microchip name and logo, the Microchip logo, AnyRate, AVR,
AVR logo, AVR Freaks, BeaconThings, BitCloud, chipKIT, chipKIT
logo, CryptoMemory, CryptoRF, dsPIC, FlashFlex, flexPWR,
Heldo, JukeBlox, K
MD, maXStylus, maXTouch, MediaLB, megaAVR, MOST, MOST
logo, MPLAB, OptoLyzer, PIC, picoPower, PICSTART, PIC32
logo, Prochip Designer, QTouch, RightTouch, SAM-BA, SpyNIC,
SST, SST Logo, SuperFlash, tinyAVR, UNI/O, and XMEGA are
registered trademarks of Microchip Technology Incorporated in
the U.S.A. and other countries.
ClockWorks, The Embedded Control Solutions Company,
EtherSynch, Hyper Speed Control, HyperLight Load, IntelliMOS,
mTouch, Precision Edge, and Quiet-Wire are registered
trademarks of Microchip Technology Incorporated in the U.S.A.
Adjacent Key Suppression, AKS, Analog-for-the-Digital Age, Any
Capacitor, AnyIn, AnyOut, BodyCom, CodeGuard,
CryptoAuthentication, CryptoCompanion, CryptoController,
dsPICDEM, dsPICDEM.net, Dynamic Average Matching, DAM,
ECAN, EtherGREEN, In-Circuit Serial Programming, ICSP, InterChip Connectivity, JitterBlocker, KleerNet, KleerNet logo, Mindi,
MiWi, motorBench, MPASM, MPF, MPLAB Certified logo, MPLIB,
MPLINK, MultiTRAK, NetDetach, Omniscient Code Generation,
PICDEM, PICDEM.net, PICkit, PICtail, PureSilicon, QMatrix,
RightTouch logo, REAL ICE, Ripple Blocker, SAM-ICE, Serial
Quad I/O, SMART-I.S., SQI, SuperSwitcher, SuperSwitcher II,
Total Endurance, TSHARC, USBCheck, VariSense, ViewSpan,
WiperLock, Wireless DNA, and ZENA are trademarks of Microchip
Technology Incorporated in the U.S.A. and other countries.
SQTP is a service mark of Microchip Technology Incorporated in
the U.S.A.
Silicon Storage Technology is a registered trademark of Microchip
Technology Inc. in other countries.
GestIC is a registered trademark of Microchip Technology
Germany II GmbH & Co. KG, a subsidiary of Microchip Technology
Inc., in other countries.
All other trademarks mentioned herein are property of their
respective companies.
© 2018, Microchip Technology Incorporated, All Rights Reserved.
ISBN: 978-1-5224-3312-5
EELOQ, KEELOQ logo, Kleer, LANCheck, LINK
DS-50002780A-page 2 2018 Microchip Technology Inc.
MIC4802
EVALUATION BOARD
USER’S GUIDE
Table of Contents
Preface ...........................................................................................................................5
Introduction............................................................................................................ 5
Document Layout .................................................................................................. 5
Conventions Used in this Guide ............................................................................ 6
Recommended Reading........................................................................................ 7
The Microchip Website.......................................................................................... 7
Product Change Notification Service..................................................................... 7
Customer Support ................................................................................................. 7
Document Revision History ................................................................................... 7
Chapter 1. Product Overview
1.1 Introduction ..................................................................................................... 9
1.2 MIC4802 Short Overview ............................................................................... 9
1.2.1 MIC4802 Key Features ............................................................................... 9
1.2.2 MIC4802 Device Overview .......................................................................... 9
1.3 MIC4802 Evaluation Board Description ....................................................... 10
1.4 MIC4802 Evaluation Board Kit Contents ...................................................... 10
Chapter 2. Installation and Operation
2.1 Introduction ................................................................................................... 11
2.2 Evaluation Board Description ....................................................................... 12
2.2.1 Current Set Resistor (R4) .......................................................................... 12
2.2.2 Enable/PWM Feature (JP1) ...................................................................... 12
2.2.3 D1 – LED Cathode (J6) ............................................................................. 15
2.2.4 Output Noise and Ripple Measurements ................................................... 15
2.2.5 Board Layout Considerations .................................................................... 15
Appendix A. Schematic and Layouts
A.1 Introduction .................................................................................................. 17
A.2 Board – Schematic ....................................................................................... 18
A.3 Board – Top Silk Layer ................................................................................ 19
A.4 Board – Top Copper and Silk Layer ............................................................. 20
A.5 Board – Top Copper Layer .......................................................................... 21
A.6 Board – Bottom Copper Layer ..................................................................... 22
A.7 Board – Bottom Copper and Silk Layer ....................................................... 23
A.8 Board – Bottom Silk Layer ........................................................................... 24
Appendix B. Bill of Materials (BOM)
Worldwide Sales and Service ....................................................................................27
2018 Microchip Technology Inc. DS-50002780A-page 3
2018 Microchip Technology Inc. DS-50002780A-page 4
MIC4802
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 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 p age 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
MIC4802 Evaluation 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 MIC4802 Evaluation Board as a development
tool. The manual layout is as follows:
• Chapter 1. “Product Overview” – Important information about the MIC4802
Evaluation Board.
• Chapter 2. “Installation and Operation” – This chapter includes a detailed
description of each function of the demonstration board and instructions for how to
begin using the MIC4802 Evaluation Board.
• Appendix A. “Schematic and Layouts” – Shows the schematic and PCB layout
diagrams for the MIC4802 Evaluation Board.
• Appendix B. “Bill of Materials (BOM)” – Lists the parts used to build the
MIC4802 Evaluation Board.
2018 Microchip Technology Inc. DS-50002780A-page 5
MIC4802 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® IDE User’s Guide
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)
{ ...
}
DS-50002780A-page 6 2018 Microchip Technology Inc.
RECOMMENDED READING
This user’s guide describes how to use the MIC4802 Evaluation Board. Other useful
documents are listed below. The following Microchip document is available and
recommended as a supplemental reference resource:
• MIC4802 Data Sheet – “High Efficiency 800mA Single Channel Linear WLED
Driver with Ultra Fast PWM™ Control” (M9999-013111-B)
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
Preface
PRODUCT CHANGE NOTIFICATION SERVICE
Microchip’s customer notification service helps keep customers current on Microchip
products. Subscribers will receive e-mail notifications whenever there are changes,
updates, revisions or errata related to a specified product family or development tool of
interest.
To register, access the Microchip website at www.microchip.com, click on Product
Change Notification and follow the registration instructions.
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 (July 2018)
• Initial release of this document.
2018 Microchip Technology Inc. DS-50002780A-page 7
MIC4802 Evaluation Board User’s Guide
NOTES:
DS-50002780A-page 8 2018 Microchip Technology Inc.
Chapter 1. Product Overview
1.1 INTRODUCTION
This chapter provides an overview of the MIC4802 Evaluation Board and covers the
following topics:
• MIC4802 Short Overview
• MIC4802 Evaluation Board Description
• MIC4802 Evaluation Board Kit Contents
1.2 MIC4802 SHORT OVERVIEW
1.2.1 MIC4802 Key Features
The key features of the MIC4802 include:
• 3.0V to 5.5V input voltage range
• Ultra Fast Pulse-width Modulation (PWM) control (200 Hz to 500 kHz)
• Dropout of 280 mV at 800 mA
• Programmable LED current with external resistor
• Current accuracy of 1% typical
• LED driver voltage range 0V to V
• Enable input voltage range 0V to V
•-40°C to +125°C junction temperature range
MIC4802
EVALUATION BOARD
USER’S GUIDE
IN
IN
1.2.2 MIC4802 Device Overview
The MIC4802 is a high efficiency White LED (WLED) linear driver designed to drive a
single LED up to 800 mA. The MIC4802 provides the highest possible efficiency, as this
architecture has no switching losses present in traditional charge pumps or inductive
boost circuits. It features a typical dropout of 280 mV at 800 mA. This allows the LEDs
to be driven directly from the voltage source eliminating switching noise/losses present
with the use of boost circuitry. The high accuracy (1% Typical) current regulated WLED
channel ensures uniform display illumination under all conditions. The brightness is
controlled through an Ultra Fast PWM Control interface operating down to less than 1%
duty cycle.
The 3.0V to 5.5V input voltage range of MIC4802 allows direct operation from one cell
Li-Ion as 3 to 4 cell Ni-Cd, Ni-MH or Alkaline batteries. Maximum battery life is assured
with a low 0.01 μA typical shutdown current.
2018 Microchip Technology Inc. DS-50002780A-page 9
Loading...