Microchip Technology MCP1630 Reference Manual
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Microchip Technology MCP1630 Reference Manual

+12v in dual output buck converter
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MCP1630
+12V In Dual Output
Buck Converter
Reference Design
© 2008 Microchip Technology Inc.
DS51531B

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Summary of Contents for Microchip Technology MCP1630

  • Page 1 MCP1630 +12V In Dual Output Buck Converter Reference Design © 2008 Microchip Technology Inc. DS51531B...
  • Page 2 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.

  • Page 3: Table Of Contents

    Chapter 1. Product Overview 1.1 Introduction ..................... 5 1.2 What IS the MCP1630 Dual Buck Reference Design? ........6 1.3 What the MCP1630 Dual Buck Reference Design kit includes ...... 6 Chapter 2. Installation and Operations 2.1 Introduction ..................... 7 2.2 Features ......................
  • Page 4 MCP1630 Dual Buck Reference Design NOTES: © 2008 Microchip Technology Inc. DS51531B-page iv...

  • Page 5: Preface

    • Customer Support • Document Revision History DOCUMENT LAYOUT This document describes how to use the MCP1630 Dual Buck Reference Design as a development tool. The manual layout is as follows: • Chapter 1. “Product Overview” – Important information about the MCP1630 Dual Buck Reference Design.
  • Page 6 MCP1630 Dual Buck 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... Initial caps...
  • Page 7 Preface RECOMMENDED READING This reference guide describes how to use MCP1630 Dual Buck Reference Design. Other useful documents are listed below. The following Microchip documents are available and recommended as supplemental reference resources. MCP1630 Data Sheet, “High-Speed, Microcontroller-Adaptable, Pulse Width Modulator”, DS21896...
  • Page 8 MCP1630 Dual Buck Reference Design NOTES: © 2008 Microchip Technology Inc. DS51531B-page 4...

  • Page 9: Chapter 1. Product Overview

    Chapter 1. Product Overview INTRODUCTION The MCP1630 Dual Buck Reference Design is used to evaluate the Microchip MCP1630 analog, high-speed Pulse Width Modulator (PWM) used in a dual synchro- nous, buck regulator, power-converter application. The evaluation board is a complete, stand-alone, dual-output, dc-dc converter with +12V input, adjustable dual output at 20A per output.

  • Page 10: What Is The Mcp1630 Dual Buck Reference Design

    MCP1630 Dual Buck Reference Design WHAT IS THE MCP1630 DUAL BUCK REFERENCE DESIGN? The MCP1630 Dual Buck Reference Design is a complete, stand-alone, dual-output power supply capable of 20A per output, powered from a +12V input source. This board ®...

  • Page 11: Introduction

    External signals include the input oscillator and the reference voltage. The power train signals include the current sense and the feedback voltage. The output signal is a square-wave pulse. The power train used for the MCP1630 Dual Buck Reference Design is a dual synchronous buck regulator.
  • Page 12 2.3.2 Power Present and Power Good Indication 1. The MCP1630 Dual Buck Reference Design has two status LED’s. One LED (D3) is used to determine if input voltage is present. 2. The second LED (D1) is used for fault and power good indication. During normal operation, if both regulator outputs are within regulation, D1 is illuminated to provide indication that power is good.
  • Page 13 Installation and Operations 2.3.3 Programming 1. The MCP1630 Dual Buck Reference Design can be programmed to calibrate , output sequencing or tracking and switching frequency dithering OUT1 OUT2 on or off. 2. To enter the programming mode, apply input voltage within the specified operating range (9V to 13.5V).
  • Page 14 MCP1630 Dual Buck Reference Design NOTES: © 2008 Microchip Technology Inc. DS51531B-page 10...

  • Page 15: Introduction And Highlights

    MCP1630 DUAL BUCK REFERENCE DESIGN Appendix A. Schematic and Layouts INTRODUCTION AND HIGHLIGHTS This appendix contains the following schematics and layouts for the MCP1630 Dual Buck Reference Design: • Board Schematic - Sheet 1 • Board Schematic - Sheet 2 •...

  • Page 16: Board - Schematic - Sheet 1

    MCP1630 Dual Buck Reference Design BOARD SCHEMATIC - SHEET 1 © 2008 Microchip Technology Inc. DS51531B-page 14...

  • Page 17: A.3 Board - Schematic - Sheet 2

    Schematic and Layouts BOARD SCHEMATIC - SHEET 2 © 2008 Microchip Technology Inc. DS51531B-page 15...

  • Page 18: Board - Top Layer

    MCP1630 Dual Buck Reference Design BOARD - TOP LAYER © 2008 Microchip Technology Inc. DS51531B-page 16...

  • Page 19: Board - Mid-Layer 1

    Schematic and Layouts BOARD - MID-LAYER 1 © 2008 Microchip Technology Inc. DS51531B-page 17...

  • Page 20: A.6 Board - Mid-Layer 2

    MCP1630 Dual Buck Reference Design BOARD - MID-LAYER 2 MIDLAYER2 © 2008 Microchip Technology Inc. DS51531B-page 18...

  • Page 21: Board - Bottom Layer

    Schematic and Layouts BOARD - BOTTOM LAYER © 2008 Microchip Technology Inc. DS51531B-page 19...
  • Page 22 MCP1630 Dual Buck Reference Design NOTES: © 2008 Microchip Technology Inc. DS51531B-page 20...
  • Page 23 RES 24.9K OHM 1/16W 1% 0603 SMD Panasonic - ECG ERJ-3EKF2492V Note 1: The components listed in this Bill of Materials are representative of the PCB assembly. The released BOM used in manufacturing uses all RoHS-compliant components. © 2008 Microchip Technology Inc. DS51531B-page 21...
  • Page 24 MCP1630 Dual Buck Reference Design TABLE B-1: BILL OF MATERIALS (BOM) (CONTINUED) Reference Description Manufacturer Part Number R11, R39, R44 RES 7.87K OHM 1/16W 1% 0603 SMD Panasonic - ECG ERJ-3EKF7871V RES 4.99K OHM 1/16W 1% 0603 SMD Panasonic - ECG ERJ-3EKF4991V RES 22.1K OHM 1/16W 1% 0603 SMD...

  • Page 25: Device Firmware

    MCP1630 DUAL BUCK REFERENCE DESIGN Appendix C. Evaluation Board Firmware DEVICE FIRMWARE For the latest version of the MCP1630 Dual Buck Reference Design firmware, visit the Microchip web site at www.microchip.com. Power-Up Initialize: Ports, Clocks, A/D, PWM, IIC and Interrupts...
  • Page 26 Fax: 86-592-2388130 Fax: 886-2-2508-0102 Toronto China - Xian Thailand - Bangkok Mississauga, Ontario, Tel: 86-29-8833-7252 Tel: 66-2-694-1351 Canada Fax: 86-29-8833-7256 Fax: 66-2-694-1350 Tel: 905-673-0699 China - Zhuhai Fax: 905-673-6509 Tel: 86-756-3210040 Fax: 86-756-3210049 01/02/08 © 2008 Microchip Technology Inc. DS51531B-page 24...

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