MCP1640 Single Quadruple-A Battery Boost Converter Reference Design 2010-2011 Microchip Technology Inc.
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MCP1640 SINGLE QUADRUPLE-A BATTERY BOOST CONVERTER REFERENCE DESIGN Table of Contents Preface ........................................................................................................................... 5 Introduction............................................................................................................ 5 Document Layout .................................................................................................. 5 Conventions Used in this Guide .....................
MCP1640 Single Quadruple-A Battery Boost Converter Reference Design NOTES: DS51922B-page 4 2010-2011 Microchip Technology Inc.
MCP1640 SINGLE QUADRUPLE-A BATTERY BOOST CONVERTER REFERENCE DESIGN 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 web site (www.microchip.com) to obtain the latest documentation available. Documents are identified with a “DS” number.
MCP1640 Single Quadruple-A Battery Boost Converter Reference Design CONVENTIONS USED IN THIS GUIDE This manual uses the following documentation conventions: DOCUMENTATION CONVENTIONS Description Arial font: Italic characters Initial caps Quotes Underlined, italic text with right angle bracket Bold characters N‘Rnnnn Text in angle brackets < > Courier New font: Plain Courier New Represents Examples Referenced books Emphasized text A window A dialog A menu selection A field name in a window or dialog A m
Preface RECOMMENDED READING This user’s guide describes how to use MCP1640 Single Quadruple-A Battery Boost Converter Reference Design. Other useful documents are listed below. The following Microchip documents are available and recommended as supplemental reference resources. • MCP1640 Data Sheet – “0.
MCP1640 Single Quadruple-A Battery Boost Converter Reference Design NOTES: DS51922B-page 8 2010-2011 Microchip Technology Inc.
MCP1640 SINGLE QUADRUPLE-A BATTERY BOOST CONVERTER REFERENCE DESIGN Chapter 1. Product Overview 1.1 INTRODUCTION This chapter provides an overview of the MCP1640 Single Quadruple-A Battery Boost Converter Reference Design and covers the following topics: • MCP1640 Short Overview • What Is the MCP1640 Single Quadruple-A Battery Boost Converter Reference Design? • MCP1640 Single Quadruple-A Battery Boost Converter Reference Design Kit Contents 1.
MCP1640 Single Quadruple-A Battery Boost Converter Reference Design L1 4.7 µH VIN 1.5V SW V OUT VIN Alkaline + - FIGURE 1-1: 1.3 CIN 4.7 µF VOUT 3.3V @ 100 mA 536 K VFB EN COUT 10 µF 309 K GND Typical MCP1640 Single Cell Input Boost Converter.
MCP1640 SINGLE QUADRUPLE-A BATTERY BOOST CONVERTER REFERENCE DESIGN Chapter 2. Installation and Operation 2.1 INTRODUCTION 2.1.1 MCP1640 Features The MCP1640 device has been developed to increase battery life. The MCP1640 is capable of regulating the output voltage over a wide range (2.0V to 5.5V), and typically delivers over 100 mA load current at 3.3V output, when supplied from a single 1.5V cell.
MCP1640 Single Quadruple-A Battery Boost Converter Reference Design 2.1.2 MCP1640 Single Quadruple-A Battery Boost Converter Reference Design Features The MCP1640 Single Quadruple-A Battery Boost Converter Reference Design is developed to demonstrate how the MCP1640 device with True Output Disconnect Shutdown option is working attached to a microcontroller application.
Installation and Operation 2.2 GETTING STARTED The MCP1640 Single Quadruple-A Battery Boost Converter Reference Design is fully assembled and tested to evaluate and demonstrate the MCP1640 products. 2.2.1 Power Input and Output Connection 2.2.1.
MCP1640 Single Quadruple-A Battery Boost Converter Reference Design 3.3V OUT Voltmeter 47R/0.5W S1: Switch ON/OFF 3.3V OUT + AAAA Battery _ FIGURE 2-2: MCP1640 Single Quadruple-A Battery Boost Converter Reference Design Setup Circuit. 2.2.2 How the MCP1640 Single Quadruple-A Battery Boost Converter Reference Design is working? Standby No Load Input Current (µA) The board is powered from a quadruple-A battery which has 600 mAh typical capacity.
Installation and Operation Periodically, the microcontroller will come out from Sleep mode for a short period of time to search if its power supply (VDD), which comes from the MCP1640 VOUT pin, reaches 2.3V threshold. This is accomplished by the internal analog comparator of the microcontroller. This compares a fraction of VOUT (from R4) with the 0.6V internal voltage reference.
MCP1640 Single Quadruple-A Battery Boost Converter Reference Design By pressing the button S1, the GP1 microcontroller port switches the P-MOS transistor ON (Q2), powering the load. The load is supplied for a fixed period of time (approximately 25 seconds), unless the button is pressed. FIGURE 2-5: Button. Waveforms when Reference Board is Turned ON by pressing S1 The PIC12F617 measures the battery voltage when the switch load (Q2) is ON. If the battery voltage is lower than 0.
MCP1640 SINGLE QUADRUPLE-A BATTERY BOOST CONVERTER REFERENCE DESIGN Appendix A. Schematic and Layouts A.1 INTRODUCTION This appendix contains the following schematics and layouts for the MCP1640 Single Quadruple-A Battery Boost Converter Reference Design: • • • • • Board – Schematic Board – Top Silk And Pads Board – Top Trace And Pads Board – Bottom Silk Layer Board – Bottom Trace, Pads And Silk 2010-2011 Microchip Technology Inc.
VPP 1 1 GND VIN 1 220K R5 TP2 1 TP5 S1 C4 1u C3 1u 1k R7 VBATT VBATT 10uF C1 1 BATT1 1 1 2 2 2 Energizer AAAA Holder TP1 1 VOUT 3 4 DS51922B-page 18 1M R1 Q1 1 /EN 3 2 330 R6 D1 1 VOUT 3 2 U1 FB VOUT VIN 4u7 4 3 2 1 U2 4 5 6 GP2 GP1 GP0 VSS PIC12F617-MSOP8 GP3/MCLR GP4/OSC2 GP5/OSC1 VDD MCP1640 EN GND SW L1 5 6 7 8 dnp R9 R4 510k /EN PGD 240k R3 1M3 R2 VOUT PGC 10uF C2 R8 100k Q2 2 3 1 1 1 PGD VPP TP4 1 TP3 1
Schematic and Layouts A.3 BOARD – TOP SILK AND PADS A.4 BOARD – TOP TRACE AND PADS A.5 BOARD – BOTTOM SILK LAYER A.6 BOARD – BOTTOM TRACE, PADS AND SILK 2010-2011 Microchip Technology Inc.
MCP1640 Single Quadruple-A Battery Boost Converter Reference Design NOTES: DS51922B-page 20 2010-2011 Microchip Technology Inc.
MCP1640 SINGLE QUADRUPLE-A BATTERY BOOST CONVERTER REFERENCE DESIGN Appendix B. Bill of Materials TABLE B-1: Qty BILL OF MATERIALS (BOM) Reference Description Manufacturer Part Number AAAA Battery 1 BATT1 AAAA Battery Holder Energizer - 2 C1, C2 CAP CER 10 µF 6.3V X7R 10% 0805 Taiyo Yuden® JMK212B7106KG-T 2 C3, C4 CAP CER 1.0 µF 10V X7R 0805 Taiyo Yuden LMK212B7105KG-T 1 D1 LED CHIPLED 570 nm GREEN 0603 SMD OSRAM Opto Semiconductors Inc 0 J3 DO NOT POPULATE CONN HEADER 5POS .
MCP1640 Single Quadruple-A Battery Boost Converter Reference Design NOTES: DS51922B-page 22 2010-2011 Microchip Technology Inc.
MCP1640 SINGLE QUADRUPLE-A BATTERY BOOST CONVERTER REFERENCE DESIGN Appendix C. MCP1640 Single Quadruple-A Battery Boost Converter Reference Design Firmware C.1 DEVICE FIRMWARE This chapter presents the MCP1640 Single Quadruple-A Battery Boost Converter Reference Design firmware flowchart. For the latest copy of the MCP1640 Single Quadruple-A Battery Boost Converter Reference Design firmware, visit our web site at www.microchip.com. 2010-2011 Microchip Technology Inc.
MCP1640 Single Quadruple-A Battery Boost Converter Reference Design START Initialize: Processor, Parameters (BATT_Low = 0.8V), WDT, Comparator, A/D SLEEP () WDT? MCP1640 = OFF Q2 = OFF LED=ON & Timer>0 ? No No Yes Decrement Timer (10s) No Blink? LED flashes ADC Setup Measure V_BATT No Yes LED State? No Comparator Enabled No V_BATT<0.8V? VOUT<2.3V? Yes Yes MCP1640 = ON Blink Delay 2 ms MCP1640 = OFF A FIGURE C-1: DS51922B-page 24 B Firmware Flowchart.
MCP1640 Single Quadruple-A Battery Boost Converter Reference Design B A No Yes Button S1? LED = OFF Q2 = OFF Yes LED State? No LED = ON MCP1640 = ON Q2 = ON Decrement Timer (10s) FIGURE C-2: Firmware Flowchart (Continuation). 2010-2011 Microchip Technology Inc.
MCP1640 Single Quadruple-A Battery Boost Converter Reference Design NOTES: DS51922B-page 26 2010-2011 Microchip Technology Inc.
MCP1640 Single Quadruple-A Battery Boost Converter Reference Design NOTES: 2010-2011 Microchip Technology Inc.
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