MCP3421DM-BFG Microchip Technology, MCP3421DM-BFG Datasheet

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... Microchip Technology Inc. MCP3421 Battery Fuel Gauge Demo Board User’s Guide DS51683A ...

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... Mate, PowerTool, REAL ICE, rfLAB, Select Mode, Smart Serial, SmartTel, Total Endurance, UNI/O, 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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... Appendix A. Schematic and Layouts A.1 Introduction .................................................................................................. 15 A.2 Schematic .................................................................................................... 16 A.3 Top Layer and Silk Screen ......................................................................... 17 A.4 Bottom Layer ............................................................................................. 17 Appendix B. Bill Of Materials (BOM) Worldwide Sales and Service .................................................................................... 22 © 2007 Microchip Technology Inc. MCP3421 BATTERY FUEL GAUGE DEMO BOARD USER’S GUIDE Table of Contents DS51683A-page iii ...

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... MCP3421 Battery Fuel Gauge Demo Board User’s Guide NOTES: DS51683A-page iv © 2007 Microchip Technology Inc. ...

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... MCP3421 Battery Fuel Gauge Demo Board. • Appendix B. “Bill Of Materials (BOM)” – Lists the parts used to build the MCP3421 Battery Fuel Gauge Demo Board. © 2007 Microchip Technology Inc. MCP3421 BATTERY FUEL GAUGE DEMO BOARD USER’S GUIDE ...

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... Optional arguments mcc18 [options] file [options] Choice of mutually exclusive errorlevel {0|1} arguments selection Replaces repeated text var_name [, var_name...] Represents code supplied by void main (void) user { ... } © 2007 Microchip Technology Inc. Examples ® IDE User’s Guide ...

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... This data sheet is needed if the user wants to modify the firmware used in the demo board. Note: In the MCP3421 Battery Fuel Gauge Demo Board Kit, the battery charging function is disabled. Contact Microchip Technology, Inc., if you need this function enabled. THE MICROCHIP WEB SITE Microchip provides online support via our web site at www.microchip.com. This web site is used as a means to make files and information easily available to customers ...

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... MCP3421 Battery Fuel Gauge Demo Board User’s Guide DOCUMENT REVISION HISTORY Revision A (October 2007) • Initial Release of this Document. DS51683A-page 4 © 2007 Microchip Technology Inc. ...

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... Note: MCP3421 Battery Fuel Gauge Demo Board has a feature to charge the battery in use. This feature is currently disabled in firmware. Please contact Microchip Technology Inc. if you need the battery charging feature. © 2007 Microchip Technology Inc. MCP3421 BATTERY FUEL GAUGE DEMO BOARD USER’S GUIDE 2 C interface ...

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... Please make sure the positive lead of the 1.5V battery holder is connected to TP9 and the negative lead (black) is connected to the GND terminal. The U1 and U5 devices may get damaged if the polarity of the battery connection is reversed. If the connection is accidently reversed, replace the U1 and U5 devices in order to obtain accurate measurements. DS51683A-page 6 WARNING © 2007 Microchip Technology Inc. ...

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... TP9 and the negative lead (black) to the GND terminal. A reversed connection will damage the U1 and U5 devices. FIGURE 1-1: MCP3421 Battery Fuel Gauge Demo Board (Top Side). © 2007 Microchip Technology Inc. Test Pins for Battery Charger MCP3422 MCP73831 ...

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... MCP3421 Battery Fuel Gauge Demo Board User’s Guide Buzzer FIGURE 1-2: MCP3421 Battery Fuel Gauge Demo Board (Bottom Side). DS51683A-page 8 © 2007 Microchip Technology Inc. ...

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... LCD Display The LCD display used character dot matrix type display. The PIC18F4550 device writes characters to the LCD. © 2007 Microchip Technology Inc. MCP3421 BATTERY FUEL GAUGE DEMO BOARD USER’S GUIDE pin of U3 (MCP73831) to the battery via the current sensor. ...

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... Jumper The MCP3421 Battery Fuel Gauge Demo Board uses two jumpers, JP1 and JP2. JP1 is used to provide a battery discharge path. Connect JP1 (while JP2 is disconnected) when testing battery discharging. Contact Microchip Technology Inc., if you need the battery charging mode. Note: Do not connect both JP1 and JP2 at the same time. ...

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... TP9 terminal and the negative lead (black) to the GND ter- minal. Make sure the 1.5V AAA battery is correctly inserted into the battery holder. Press the S1 push button. © 2007 Microchip Technology Inc. Microchip Fuel Gauge Demo Disconnect JP2 ConntJP1, Push S1 Connect 1 ...

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... U1 and U5 devices. The reading on the LCD is not reliable anymore. If this happens, one of the symptoms is that the LCD will display a higher reading or a lesser reading (negative) sign in the current “I” reading. Please replace the U1 and U5 devices, if this incident occurred or contact Microchip Technology Inc. DS51683A-page +1.5203062 +0.0141780 A Fuel Used: 0 ...

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... LCD. ( for Discharging Current) Display Battery Volts and * Discharging Fuel (mAh) = Discharging Current (mAs)/3600 Fuel Used (mAh) = FIGURE 2-1: © 2007 Microchip Technology Inc. START Get ADC value from U1 Get ADC value from U5 Battery Volt = 2 * Acquired Volts ( for Battery Voltage) ...

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... Fuel Remain (mAh) = Fuel Remain (mAh) Is Battery Fully Charged ? FIGURE 2-2: MCP3421 Battery Fuel Gauge Computation Algorithm with Battery Recharge Feature Enabled. (Contact Microchip Technology Inc., if you need this feature enabled). DS51683A-page 14 START Get ADC value from U1 Get ADC value from U5 ...

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... This appendix contains the schematics and PCB layouts for the MCP3421 Battery Fuel Gauge Demo Board. This Appendix includes: • Schematic • Top Layer (with silk screen) • Bottom Layer © 2007 Microchip Technology Inc. MCP3421 BATTERY FUEL GAUGE DEMO BOARD USER’S GUIDE NOTICE TO CUSTOMERS DS51683A-page 15 ...

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... MCP3421 Battery Fuel Gauge Demo Board User’s Guide A.2 SCHEMATIC DS51683A-page 16 © 2007 Microchip Technology Inc. ...

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... A.3 TOP LAYER AND SILK SCREEN A.4 BOTTOM LAYER © 2007 Microchip Technology Inc. DS51683A-page 17 ...

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... MCP3421 Battery Fuel Gauge Demo Board User’s Guide NOTES: DS51683A-page 18 © 2007 Microchip Technology Inc. ...

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... LED THIN 565NM GRN DIFF 0805 SMD Note: 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. © 2007 Microchip Technology Inc. MCP3421 BATTERY FUEL GAUGE DEMO BOARD USER’S GUIDE NOTICE TO CUSTOMERS Description ...

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... R16, R30, R31 RES 1.0K OHM 1/10W .5% 0603 SMD Note: 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. © 2007 Microchip Technology Inc. Manufacturer Part Number Lumex Inc. SML-LXT0805IW-TR Lumex Inc. ...

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... X1 CRYSTAL 20.000MHZ 18PF FUND SMD Note: 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. © 2007 Microchip Technology Inc. Manufacturer Part Number Vishay/Dale CRCW0603332RFKEA Vishay/Dale CRCW060324R9FKEA — ...

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... Taiwan - Kaohsiung Tel: 886-7-536-4818 Fax: 886-7-536-4803 Taiwan - Taipei Tel: 886-2-2500-6610 Fax: 886-2-2508-0102 Thailand - Bangkok Tel: 66-2-694-1351 Fax: 66-2-694-1350 Draft © 2007 Microchip Technology Inc. EUROPE Austria - Wels Tel: 43-7242-2244-39 Fax: 43-7242-2244-393 Denmark - Copenhagen Tel: 45-4450-2828 Fax: 45-4485-2829 France - Paris Tel: 33-1-69-53-63-20 ...