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Summary of Contents for Microchip Technology MCP1664
- Page 1 MCP1664 LED Driver Evaluation Board User’s Guide 2015 Microchip Technology Inc. DS50002363A...
- Page 2 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.
- Page 3 Object of Declaration: MCP1664 LED Driver Evaluation Board 2015 Microchip Technology Inc. DS50002363A-page 3...
- Page 4 MCP1664 LED Driver Evaluation Board User’s Guide NOTES: 2015 Microchip Technology Inc. DS50002363A-page 4...
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Page 5: Table Of Contents
Chapter 1. Product Overview 1.1 Introduction ....................11 1.2 MCP1664 Short Overview ................11 1.3 What is the MCP1664 LED Driver Evaluation Board? ......... 12 1.4 Contents of the MCP1664 LED Driver Evaluation Board ......12 Chapter 2. Installation and Operation 2.1 Introduction .................... - Page 6 MCP1664 LED Driver Evaluation Board User’s Guide NOTES: 2015 Microchip Technology Inc. DS50002363A-page 6...
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Page 7: Preface
• Customer Support • Document Revision History DOCUMENT LAYOUT This document describes how to use the MCP1664 LED Driver Evaluation Board as a development tool. The manual layout is as follows: • Chapter 1. “Product Overview” – Important information about the MCP1664 LED Driver Evaluation Board. -
Page 8: Conventions Used In This Guide
MCP1664 LED Driver 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... -
Page 9: Recommended Reading
Preface RECOMMENDED READING This user's guide describes how to use the MCP1664 LED Driver Evaluation Board. Other useful documents are listed below. The following Microchip documents are available and recommended as supplemental reference resources. • MCP1664 Data Sheet – “High-Voltage Step-Up LED Driver with UVLO and Open Load Protection”... - Page 10 MCP1664 LED Driver Evaluation Board User’s Guide NOTES: 2015 Microchip Technology Inc. DS50002363A-page 10...
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Page 11: Chapter 1. Product Overview
The LED can be turned on and off with a variable duty cycle applied to the EN pin for applications that require current dimming. Compared to its counterpart, the MCP1663 which is designed to be a voltage source, the start-up time for the MCP1664 has been decreased in order to obtain better performance in dimming applications. -
Page 12: What Is The Mcp1664 Led Driver Evaluation Board
MCP1664 LED Driver Evaluation Board User’s Guide WHAT IS THE MCP1664 LED DRIVER EVALUATION BOARD? The MCP1664 LED Driver Evaluation Board is used to evaluate and demonstrate Microchip Technology’s MCP1664 product. This board demonstrates the MCP1664 in a boost-converter application supplied from an external voltage source, which drives a string of LEDs with three selectable currents. -
Page 13: Chapter 2. Installation And Operation
Chapter 2. Installation and Operation INTRODUCTION The MCP1664 has been developed for applications that require driving a string of LEDs from a low-voltage source. The MCP1664 is a non-synchronous step-up regulator that can operate over a wide output range up to 32V. Its maximum output current is based on the switch peak current limit (set to 1.8A) and on the maximum... -
Page 14: Getting Started
MCP1664 LED Driver Evaluation Board GETTING STARTED The MCP1664 LED Driver Evaluation Board is fully assembled and tested to evaluate and demonstrate the MCP1664 product. This board requires the use of external lab supplies. 2.3.1 Power Input and Output Connection 2.3.1.1... - Page 15 FIGURE 2-3: Maximum Output Current vs. Input Voltage. For the MCP1664 LED Driver Evaluation Board, if the current select switch is set to 90 mA, the input voltage range varies from 2.4V to 5.5V; when the current select switch is set to 180 mA, the input voltage range is from 3V to 5.5V; when the current select switch is set to 270 mA, the input voltage range runs from 4.5V to 5.5V...
- Page 16 2.3.1.4 PWM DIMMING BLOCK The MCP1664 allows PWM dimming by turning on and off the LED with a PWM signal applied to the EN pin. The maximum frequency for dimming is limited by the start-up and the load. By varying the duty cycle of the PWM signal applied on the EN pin, the LED current changes linearly.
- Page 17 – ------V DD Where: R < R For the MCP1664 LED Driver Evaluation Board, the components were chosen so that they feature a PWM Dimming frequency of 125 Hz and an amplitude swing from 5% V to 95% V REFERENCE...
- Page 18 MCP1664 LED Driver Evaluation Board TRIANGULAR WAVE REFERENCE VOLTAGE DIMMING SIGNAL FIGURE 2-6: Obtaining the Dimming Signal - 27%. DIMMING SIGNAL CURRENT SWITCH SIGNAL FIGURE 2-7: Dimming Results - V = 4.5V, I = 90 mA, DUTY = 27%. LED_SET ...
- Page 19 Installation and Operation DIMMING SIGNAL CURRENT SWITCH SIGNAL FIGURE 2-8: DIMMING results - V = 4.5V, I = 90 mA, DUTY = 71% LED_SET 2015 Microchip Technology Inc. DS50002363A-page 19...
- Page 20 MCP1664 LED Driver Evaluation Board NOTES: 2015 Microchip Technology Inc. DS50002363A-page 20...
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Page 21: Appendix A. Schematic And Layouts
EVALUATION BOARD USER’S GUIDE Appendix A. Schematic and Layouts INTRODUCTION This appendix contains the following schematics and layouts for the MCP1664 LED Driver Evaluation Board: • Board – Schematic • Board – Top Silk • Board – Top Copper and Silk •... -
Page 22: Board - Schematic
4.7uH 4.7k 4.7k 0603 0603 DIMMING DIMMING 2k k 0603 0603 0.47uF 0.47uF 6.3V 6.3V 0603 0603 HEATSINK1 MBRA140T3G MCP1664 MCP1664 1206 10uF 10uF 10uF 10uF VDD D 10uF WHITE OUTA OUTA VSS S VDD D HEATSINK2 0.1uF 0.1uF 1210... -
Page 23: Board - Top Silk
Schematic and Layouts BOARD – TOP SILK BOARD – TOP COPPER AND SILK BOARD – BOTTOM COPPER AND SILK 2015 Microchip Technology Inc. DS50002363A-page 23... -
Page 24: Microchip Technology Inc. Ds50002363A
MCP1664 LED Driver Evaluation Board User’s Guide NOTES: 2015 Microchip Technology Inc. DS50002363A-page 24... -
Page 25: Appendix B. Bill Of Materials (Bom)
2700K SMD L3.45W3.45H2.2 ® Q1, Q2 Trans. FET N-CH DMN2050L-7 20V 5.9A Diodes Incorporated DMN2050L-7 1.4W SOT-23-3 Printed Circuit Board – MCP1664 LED 04-10371 — Driver Evaluation Board ® Res. TKF 4.7k 5% 1/10W SMD 0603 Panasonic - ECG ERJ-3GEYJ472V Res. - Page 26 MCP1664 LED Driver Evaluation Board TABLE B-1: BILL OF MATERIALS (BOM) (CONTINUED) Qty. Reference Description Manufacturer Part Number MCHP Analog Switcher Boost LED Microchip Technology Inc. MCP1664T-E/OT Driver 32V MCHP Analog Op Amp 4-Ch 1 MHz Microchip Technology Inc. MCP6004-E/ST MCP6004T-E/ST TSSOP-14 BUMPER CYLIN 0.312”...
- Page 27 MCP1664 LED Driver Evaluation Board NOTES: 2015 Microchip Technology Inc. DS50002363A-page 27...
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Page 28: Worldwide Sales And Service
Tel: 886-2-2508-8600 China - Xian Tel: 631-435-6000 Tel: 86-29-8833-7252 Fax: 886-2-2508-0102 San Jose, CA Fax: 86-29-8833-7256 Thailand - Bangkok Tel: 408-735-9110 Tel: 66-2-694-1351 Canada - Toronto Fax: 66-2-694-1350 Tel: 905-673-0699 Fax: 905-673-6509 01/27/15 2015 Microchip Technology Inc. DS50002363A-page 28... - Page 29 Mouser Electronics Authorized Distributor Click to View Pricing, Inventory, Delivery & Lifecycle Information: Microchip ADM00641...
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