Microchip Technology MCP1640 User Manual
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Microchip Technology MCP1640 User Manual

12v/50 ma two cells input boost converter reference design
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MCP1640
12V/50 mA Two Cells Input
Boost Converter Reference Design
User's Guide
© 2011 Microchip Technology Inc.
DS51999A

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Summary of Contents for Microchip Technology MCP1640

  • Page 1 MCP1640 12V/50 mA Two Cells Input Boost Converter Reference Design User’s Guide © 2011 Microchip Technology Inc. DS51999A...
  • Page 2 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.

  • Page 3: Table Of Contents

    Chapter 1. Product Overview 1.1 Introduction ..................... 9 1.2 MCP1640 Short Overview ................9 1.3 What is the MCP1640 12V/50 mA Two Cells Input Boost Converter Reference Design? ................. 11 1.4 What Does the MCP1640 12V/50 mA Two Cells Input Boost Converter Reference Design Kit Include? ...............
  • Page 4 MCP1640 12V/50 mA Two Cells Input Boost Converter Reference Design NOTES: © 2011 Microchip Technology Inc. DS51999A-page 4...

  • Page 5: Preface

    • Document Revision History DOCUMENT LAYOUT This document describes how to use the MCP1640 12V/50 mA Two Cells Input Boost Converter Reference Design as a development tool to evaluate the MCP1640 device’s capability to boost low voltages to a high output value, using a single inductor. The manual layout is as follows: •...

  • Page 6: Conventions Used In This Guide

    MCP1640 12V/50 mA Two Cells Input Boost Converter 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 7: Recommended Reading

    Preface RECOMMENDED READING This user’s guide describes how to use the MCP1640 12V/50 mA Two Cells Input Boost Converter Reference Design. Other useful documents are listed below. The following Microchip document is available and recommended as a supplemental reference resource.
  • Page 8 MCP1640 12V/50 mA Two Cells Input Boost Converter Reference Design NOTES: © 2011 Microchip Technology Inc. DS51999A-page 8...

  • Page 9: Chapter 1. Product Overview

    MCP1640 12V/50 mA TWO CELLS INPUT BOOST CONVERTER REFERENCE DESIGN Chapter 1. Product Overview INTRODUCTION This chapter provides an overview of the MCP1640 12V/50 mA Two Cells Input Boost Converter Reference Design and covers the following topics: • MCP1640 Short Overview •...
  • Page 10 MCP1640 12V/50 mA Two Cells Input Boost Converter Reference Design 1.2.1 MCP1640 Key Features • Up to 96% Typical Efficiency • 800 mA Typical Peak Input Current Limit: > 100 mA @ 1.2V V , 3.3V V > 350 mA @ 2.4V V , 3.3V V...

  • Page 11: What Is The Mcp1640 12V/50 Ma Two Cells Input Boost Converter Reference Design

    Figure 1-2), a lower/higher output than 12V will be obtained. The MCP1640 Input Boost Converter was developed to help engineers reduce product design cycle time. At 2.0V input and 12V output, the board is capable of a maximum of 50 mA load current.
  • Page 12 MCP1640 12V/50 mA Two Cells Input Boost Converter Reference Design NOTES: © 2011 Microchip Technology Inc. DS51999A-page 12...

  • Page 13: Chapter 2. Installation And Operation

    INTRODUCTION The MCP1640 12V/50 mA Two Cells Input Boost Converter Reference Design is developed to demonstrate how the MCP1640 device can operate as a high output voltage DC-DC converter when powered from two batteries. This reference design allows boosting from the input range of 2.0V-5V to an output higher than 5.5V of the typical MCP1640 application.
  • Page 14 MCP1640 12V/50 mA Two Cells Input Boost Converter Reference Design 80.0 75.0 70.0 65.0 60.0 = 2.4V = 3.0V 55.0 50 0 50.0 45.0 40.0 Load Current (mA) FIGURE 2-1: Efficiency vs. Load Current for 12V Output at 2.4V and 3.0V Input.

  • Page 15: Getting Started

    Powering the MCP1640 12V/50 mA Two Cells Input Boost Converter Reference Design The extended input range of the MCP1640 Input Boost Converter is 2.0 to 5.0V input. Good efficiency is obtained by supplying from two cells (primary and secondary batter- ies).
  • Page 16 (this output is unregulated). The difference between SWH and SWL signals is their amplitude. For 12V output, the amplitude of SWL is approximately 5V, while SWH shows the sum of MCP1640's SW node (SWL signal) and external n-channel MOS voltage.

  • Page 17: Installation And Operation

    Waveforms for 60 mA Load and 2.4V Input in Continuous mode. 2.2.3 How Does the MCP1640 12V/50 mA Two Cells Input Boost Converter Reference Design Works? The board was designed to boost low voltage from two alkaline cells or NiCd/NiMH cells to high voltage.
  • Page 18 MCP1640 starts switching, and the external N-MOS is turned on, cascading the internal N-MOS switch of the MCP1640 to work with high voltage, more than 6V. Notice that the MCP1640 is working internally as a synchronous rectifier and delivers on its output (Pin 5) a part of the total output power.

  • Page 19: Appendix A. Schematic And Layouts

    MCP1640 12V/50 mA TWO CELLS INPUT BOOST CONVERTER REFERENCE DESIGN Appendix A. Schematic and Layouts INTRODUCTION This appendix contains the following schematics and layouts for the MCP1640 12V/50 mA Two Cells Input Boost Converter Reference Design: • Board – Schematic •...

  • Page 20: Board - Schematic

    MCP1640 12V/50 mA Two Cells Input Boost Converter Reference Design BOARD – SCHEMATIC © 2011 Microchip Technology Inc. DS51999A-page 20...

  • Page 21: Board - Top Silk And Pads

    Schematic and Layouts BOARD – TOP SILK AND PADS © 2011 Microchip Technology Inc. DS51999A-page 21...

  • Page 22: Board - Top Copper And Pads

    MCP1640 12V/50 mA Two Cells Input Boost Converter Reference Design BOARD – TOP COPPER AND PADS © 2011 Microchip Technology Inc. DS51999A-page 22...

  • Page 23: Board - Bottom Copper And Pads

    Schematic and Layouts BOARD – BOTTOM COPPER AND PADS © 2011 Microchip Technology Inc. DS51999A-page 23...
  • Page 24 MCP1640 12V/50 mA Two Cells Input Boost Converter Reference Design NOTES: © 2011 Microchip Technology Inc. DS51999A-page 24...

  • Page 25: Appendix B. Bill Of Materials

    MCP1640 12V/50 mA TWO CELLS INPUT BOOST CONVERTER REFERENCE DESIGN Appendix B. Bill of Materials TABLE B-1: BILL OF MATERIALS (BOM) Reference Description Manufacturer Part Number ® CAP. CER 10 µF 6.3V X5R 20% 0603 Corporation C1608X5R0J106M CAP. CER 10 µF 16V X5R 0805...

  • Page 26: Worldwide Sales And Service

    Tel: 408-961-6444 Fax: 408-961-6445 China - Xian Tel: 86-29-8833-7252 Toronto Fax: 86-29-8833-7256 Mississauga, Ontario, Canada China - Xiamen Tel: 905-673-0699 Tel: 86-592-2388138 Fax: 905-673-6509 Fax: 86-592-2388130 China - Zhuhai Tel: 86-756-3210040 08/02/11 Fax: 86-756-3210049 © 2011 Microchip Technology Inc. DS51999A-page 26...
  • Page 27 Mouser Electronics Authorized Distributor Click to View Pricing, Inventory, Delivery & Lifecycle Information: Microchip ARD00386...

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