Microchip Technology MCP1630 Reference Design
Sepic automotive led driver
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Summary of Contents for Microchip Technology MCP1630
- Page 1 Chipsmall Limited consists of a professional team with an average of over 10 year of expertise in the distribution of electronic components. Based in Hongkong, we have already established firm and mutual-benefit business relationships with customers from,Europe,America and south Asia,supplying obsolete and hard-to-find components to meet their specific needs.
- Page 2 MCP1630 SEPIC Automotive LED Driver Reference Design © 2011 Microchip Technology Inc. DS51955A...
- Page 3 Select Mode, Total Endurance, TSHARC, UniWinDriver, WiperLock 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. All other trademarks mentioned herein are property of their respective companies.
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Page 4: Table Of Contents
1.2 Features ......................10 1.3 Device Summary .....................10 1.4 Technical Specifications ..................11 1.5 Functional Description ..................12 1.6 What the MCP1630 SEPIC Automotive LED Driver Reference Design Kit Includes ......................12 Chapter 2. Installation and Operation 2.1 Getting Started ....................13 2.2 Setup Procedure .....................13 2.3 Evaluating the Application ................15... - Page 5 MCP1630 Sepic Automotive LED Driver Reference Design © 2011 Microchip Technology Inc. DS51955A-page 4...
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Page 6: Preface
• Document Revision History DOCUMENT LAYOUT This document describes how to use the MCP1630 SEPIC Automotive LED Driver Reference Design User’s Guide as a development tool to emulate and debug firmware on a target board. The manual layout is as follows: •... -
Page 7: Conventions Used In This Guide
MCP1630 Sepic Automotive LED Driver Reference Design 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 8: Recommended Reading
Preface RECOMMENDED READING This user’s guide describes how to use the MCP1630 SEPIC Automotive LED Driver Reference Design User’s Guide. Other useful documents are listed below. The follow- ing Microchip documents are available and recommended as supplemental reference resources. • MCP1630/MCP1630V Data Sheet – “High-Speed, Microcontroller-Adaptable, Pulse Width Modulator”... -
Page 9: Document Revision History
MCP1630 Sepic Automotive LED Driver Reference Design DOCUMENT REVISION HISTORY Revision A (September 2011) • Initial Release of this Document. © 2011 Microchip Technology Inc. DS51955A-page 8... -
Page 10: Chapter 1. Product Overview
PWM comparator and a high-current driver output pin. The switching frequency and the maximum duty cycle for the MCP1630 are determined by an external clock source. -
Page 11: Features
The MCP1630 Sepic Automotive LED Driver Reference Design uses the following devices: • MCP1630 High-Speed Pulse-Width Modulator IC – When used in conjunction with a microcontroller, the MCP1630 controls the power system duty cycle to provide output current and/or voltage regulation. -
Page 12: Technical Specifications
5 GND SEPIC Power Train LED String SENSE COMP Compensation Network Current Sense Resistor CLOCK Reference Voltage Filter Aux. Dimming Sense PIC12F683 FIGURE 1-1: MCP1630 Sepic Automotive LED Driver Reference Design Block Diagram. © 2011 Microchip Technology Inc. DS51955A-page 11... -
Page 13: Functional Description
MCP1630 device’s PWM controller. The reference voltage for the MCP1630 device is also provided by PIC12F683, at the pin (Pin 8). R4, R3 and C2 form a low-pass filter that smooths the PWM signal ®... -
Page 14: Chapter 2. Installation And Operation
Chapter 2. Installation and Operation GETTING STARTED The MCP1630 Sepic Automotive LED Driver Reference Design is fully assembled and tested. The board requires the use of an external input voltage source (9V to 16V) and an external LED load, provided by Microchip. - Page 15 2.2.4 Powering the Board Connect a power supply to J2 to power up the MCP1630 Sepic Automotive LED Driver Reference Design. Ensure that the power supply has the (+) terminal connected to the J2 terminal block at Pin 1 (left), and the (–) terminal connected to Pin 2 (right). The input voltage source should be limited to a range from 9V to 16V.
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Page 16: Evaluating The Application
LSbs. This 10-bit value is represented by the CCPR1L:CCP1CON<5:4> bits. The switching frequency is set to 330 kHz. The reference voltage for the MCP1630 device is produced by the software PWM. This allows the user to adjust the LED’s intensity in eight steps. -
Page 17: Programming The Pic12F683 Microcontroller
MCP1630 Sepic Automotive LED Driver Reference Design PROGRAMMING THE PIC12F683 MICROCONTROLLER The firmware package provides the source and .hex files for the LED driver. The board is factory programmed with the LED driver firmware. UVLO, OVLO thresholds and dimming steps can be modified. The source code is commented extensively and helps the user to define the board. -
Page 18: Appendix A. Schematic And Layouts
MCP1630 SEPIC AUTOMOTIVE LED DRIVER REFERENCE DESIGN Appendix A. Schematic and Layouts INTRODUCTION This appendix contains the following schematics and layouts for the MCP1630 Sepic Automotive LED Driver Reference Design User’s Guide: • Board – Schematic • Board – Top Copper and Pads •... - Page 19 1500 TP10 1500 ISENSE DRIVE 22uH MCP1416 2.2u 2.2u ISENSE Comp ISENSE BSC196N10NSG OSC IN 0.22 0.22 MCP1630 100k = lout X Rsense 3.3K 470P Rsense = 0.5 GP0/AN0/CIN+/ICSPDAT/ULPWU PROGRAMMING HEADER GP5/TICKI/OSC1/CLKIN DIMMING GP4/AN3/OSC2/CLKOUT GP1/AN1/CIN-/V /ICSPCLK +VIN_SENSE GP3/MCLR/V GP2/AN2/T0CKI/INT/COUT/CCP1 470P...
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Page 20: Board - Top Copper And Pads
Schematic and Layouts BOARD – TOP COPPER AND PADS © 2011 Microchip Technology Inc. DS51955A-page 19... -
Page 21: Board - Top Copper Pads And Silk
MCP1630 Sepic Automotive LED Driver Reference Design BOARD – TOP COPPER PADS AND SILK © 2011 Microchip Technology Inc. DS51955A-page 20... -
Page 22: Board - Top Silk And Pads
Schematic and Layouts BOARD – TOP SILK AND PADS © 2011 Microchip Technology Inc. DS51955A-page 21... -
Page 23: Board - Bottom Copper And Pads
MCP1630 Sepic Automotive LED Driver Reference Design BOARD – BOTTOM COPPER AND PADS © 2011 Microchip Technology Inc. DS51955A-page 22... -
Page 24: Appendix B. Bill Of Materials (Bom)
MCP1630 SEPIC AUTOMOTIVE LED DRIVER REFERENCE DESIGN Appendix B. Bill of Materials (BOM) TABLE B-1: BILL OF MATERIALS (BOM) Reference Description Manufacturer Part Number B1, B2, B3, B4 BUMPON HEMISPHERE .44X.20 SJ-5303 (CLEAR) CLEAR ® C1,C4 CAPACITOR 1500P 50V COG 5%... - Page 25 MCP1630 Sepic Automotive LED Driver Reference Design TABLE B-1: BILL OF MATERIALS (BOM) (CONTINUED) Reference Description Manufacturer Part Number RESISTOR 100K OHM 1/8W 1% Vishay CRCW0805100KFKEA SMD 0805 Intertechnology, Inc. RESISTOR 2.7M OHM 1/8W 1% Vishay CRCW08052M70FKEA SMD 0805 Intertechnology, Inc.
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Page 26: Appendix C. Firmware Flowchart
MCP1630 SEPIC AUTOMOTIVE LED DRIVER REFERENCE DESIGN Appendix C. Firmware Flowchart MCP1630 SEPIC AUTOMOTIVE LED DRIVER REFERENCE DESIGN FIRMWARE FLOWCHART Interrupt Start GPIO Setup GP5 -> Vref OUT GP2 -> CLK OUT GP4 -> Vin SENSE Comparator Tripped GP1 -> OVP Input...
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