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Summary of Contents for Microchip Technology MCP1632
- Page 1 MCP1632 Single-Cell Li-Ion Battery Charger Demo Board User’s Guide 2014 Microchip Technology Inc. DS50002321A...
- 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: MCP1632 Single-Cell Li-Ion Battery Charger Demo Board 2014 Microchip Technology Inc. DS50002321A-page 3...
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Page 4: Table Of Contents
1.3 Device Summary .................... 9 1.4 Technical Specifications ................10 1.5 Functional Description .................. 10 1.6 What Does the MCP1632 Single-Cell Li-Ion Battery Charger Demo Board In- clude? ..................... 11 Chapter 2. Installation and Operation 2.1 Getting Started ..................... 13 2.1.1 Additional Components Required for Operation ........ -
Page 5: Preface
• Revision History DOCUMENT LAYOUT This document describes how to use the MCP1632 Single-Cell Li-Ion Battery Charger Demo Board as a development tool to emulate and debug firmware on a target board, as well as how to program devices. The document is organized as follows: •... -
Page 6: Conventions Used In This Guide
MCP1632 Single-Cell Li-Ion Battery Charger Demo 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 7: Recommended Reading
Preface RECOMMENDED READING This user's guide describes how to use the MCP1632 Single-Cell Li-Ion Battery Char- ger Demo Board. Other useful documents are listed below. The following Microchip documents are available and recommended as supplemental reference resources. • MCP1632 Data Sheet – “High-Speed, Low-Side PWM Controller”... - Page 8 MCP1632 Single-Cell Li-Ion Battery Charger Demo Board User’s Guide NOTES: 2014 Microchip Technology Inc. DS50002321A-page 8...
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Page 9: Chapter 1. Product Overview
• MCP1632 high-speed current mode PWM controller. – When used in conjunction with a microcontroller, the MCP1632 will control the power system duty cycle to provide output current and/or voltage regulation. • PIC12F1822 microcontroller (8-bit MCU) – Used to implement the charging algo- rithm and to provide additional software functions like protections. -
Page 10: Technical Specifications
The conversion gain of this circuit is 1V/A. The PWM output available from the PIC12F1822 microcontroller is used to control the reference voltage of the MCP1632 using the circuit created with D2 and R3 components. Maximum output current is set by the PIC12F1822 microcontroller. -
Page 11: What Does The Mcp1632 Single-Cell Li-Ion Battery Charger Demo Board Include
WHAT DOES THE MCP1632 SINGLE-CELL LI-ION BATTERY CHARGER DEMO BOARD INCLUDE? The MCP1632 Single-Cell Li-Ion Battery Charger Demo Board includes: • MCP1632 Single-Cell Li-Ion Battery Charger Demo Board (ARD00558) • Information Sheet 2014 Microchip Technology Inc. DS50002321A-page 11... - Page 12 MCP1632 Single Cell Li-Ion Battery Charger Demo Board User’s Guide NOTES: 2014 Microchip Technology Inc. DS50002321A-page 12...
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Page 13: Chapter 2. Installation And Operation
DEMO BOARD USER’S GUIDE Chapter 2. Installation and Operation GETTING STARTED The MCP1632 Single-Cell Li-Ion Battery Charger Demo Board is fully assembled and tested. The board requires the use of an external input voltage source (+4.5V to +12V). 2.1.1 Additional Components Required for Operation •... -
Page 14: Connecting The Single-Cell Battery
2.2.3 Powering the Board Connect a power supply to J1 to power-up the MCP1632 Single-Cell Li-Ion Battery Charger Demo Board. Ensure that the power supply has the (+) terminal connected to J2 terminal block at pin 1 (up) and (–) terminal connected to pin 2 (down). The input voltage source should be limited to the 4.5V to 12V range. -
Page 15: Evaluating The Application
EVALUATING THE APPLICATION The best way to evaluate the MCP1632 Single-Cell Li-Ion Battery Charger Demo Board is to examine the circuit and measure voltages and currents with a Digital Voltage Meter (DVM) and probe the board with an oscilloscope. Additional tools are necessary to evaluate some technical parameters of the board (temperature of power components, ability to withstand surge voltage pulse on input, EMI). -
Page 16: Main Loop Description
MCP1632 Single-Cell Li-Ion Battery Charger Demo Board User’s Guide 2.4.1 Main Loop Description The charger state machine is hardware independent, so all the output regulation is done in the main loop. Besides calling the state machine every second, different parameters and macros are required for the state machine code. -
Page 17: State Machine Description
= 4.2V Sense Idle Mode 2 Constant Voltage (4.2V) < I Sense Bat_Detect Time Out? < I Sense Flat Standby Battery_Standby_Mode < V Sense Bat_Detect < Topping_Voltage Sense FIGURE 2-3: The Charger State Machine. 2014 Microchip Technology Inc. DS50002321A-page 17... - Page 18 MCP1632 Single-Cell Li-Ion Battery Charger Demo Board User’s Guide TABLE 2-1: CHARGING STATES State Description Precharge Charges battery with a low current (usually C/10) until the battery voltage exceeds the defined cutoff voltage. Charge The Charge state has two phases: constant current mode and constant voltage mode. The Charge cycle starts in constant current mode, in which the battery is charged with a constant current (usually C/2) until the battery voltage equals +4.2 V...
- Page 19 EQUATION 2-2: CURRENT CALCULATION EXAMPLE FOR 1000 MA ADC maximum Current Shunt Value Amplification Current Counts ----------------------------------------------------------------------------------------------------------------------------------------------------- - ADC Reference 4096 1A Counts ------------------------------------------------------- - 2000 2.048V 2014 Microchip Technology Inc. DS50002321A-page 19...
- Page 20 MCP1632 Single-Cell Li-Ion Battery Charger Demo Board User’s Guide NOTES: 2014 Microchip Technology Inc. DS50002321A-page 20...
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Page 21: Appendix A. Schematic And Layouts
LI-ION BATTERY CHARGER DEMO BOARD USER’S GUIDE Appendix A. Schematic and Layouts INTRODUCTION This appendix contains the following schematics and layouts for the MCP1632 Single-Cell Li-Ion Battery Charger Demo Board: • Board – Schematic • Board – Top Silk • Board – Top Copper and Silk •... -
Page 22: Board - Schematic
BOARD – SCHEMATIC VOUT 4.7u 4.7u Term Block 2Pin 2.54mm 10u/50V 2A/40V VEXT 100k 680k MCP1632 10u/25V 1N4148 COMP 470n 6.8k 2.7k 470k 4.7n 1 2 3 4 5 100k OPAMP- OUTA ISENSE 100p VOUT MCLR/VPP/RA3 SPST 100p... -
Page 23: Board - Top Silk
BOARD – TOP SILK 2014 Microchip Technology Inc. DS50002321A-page 23... -
Page 24: Board - Top Copper And Silk
MCP1632 Single-Cell Li-Ion Battery Charger Demo Board User’s Guide BOARD – TOP COPPER AND SILK 2014 Microchip Technology Inc. DS50002321A-page 24... -
Page 25: Board - Top Copper
BOARD – TOP COPPER 2014 Microchip Technology Inc. DS50002321A-page 25... -
Page 26: Board - Bottom Copper
MCP1632 Single-Cell Li-Ion Battery Charger Demo Board User’s Guide BOARD – BOTTOM COPPER 2014 Microchip Technology Inc. DS50002321A-page 26... -
Page 27: Board - Bottom Copper And Silk
BOARD – BOTTOM COPPER AND SILK 2014 Microchip Technology Inc. DS50002321A-page 27... - Page 28 MCP1632 Single-Cell Li-Ion Battery Charger Demo Board User’s Guide NOTES: 2014 Microchip Technology Inc. DS50002321A-page 28...
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Page 29: Appendix B. Bill Of Materials (Bom)
Res. 39 kΩ 1/10W 1% 0603 Stackpole RMCF0603FT39K0 Electronics, Inc. The components listed in this Bill of Materials are representative of the PCB assembly. The Note: released BOM used in manufacturing uses all RoHS-compliant components. 2014 Microchip Technology Inc. DS50002321A-page 29... - Page 30 MCP1632 Single-Cell Li-Ion Battery Charger Demo Board User’s Guide TABLE B-1: BILL OF MATERIALS (CONTINUED) Quantity Designator Description Manufacturer Manufacturer Part Number Res. 2.7 kΩ 1/10W 5% 0603 Stackpole RMCF0603JT2K70 Electronics, Inc. Res. 91 kΩ 1/10W 5% 0603 Stackpole RMCF0603JT91K0 Electronics, Inc.
- Page 31 NOTES: 2014 Microchip Technology Inc. DS50002321A-page 31...
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Page 32: Worldwide Sales And Service
Tel: 86-29-8833-7252 Tel: 631-435-6000 Fax: 86-29-8833-7256 San Jose, CA China - Xiamen Tel: 408-735-9110 Tel: 86-592-2388138 Canada - Toronto Fax: 86-592-2388130 Tel: 905-673-0699 Fax: 905-673-6509 China - Zhuhai Tel: 86-756-3210040 03/25/14 Fax: 86-756-3210049 2014 Microchip Technology Inc. DS50002321A-page 32... - Page 33 Mouser Electronics Authorized Distributor Click to View Pricing, Inventory, Delivery & Lifecycle Information: Microchip ARD00558...
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