User ManualTable of ContentsPreface5Introduction5Document Layout5Conventions Used in this Guide6Recommended Reading6The Microchip Web Site7Customer Support7Document Revision History7Chapter 1. Product Overview91.1 Introduction91.2 What is the MCP73X23 Lithium Iron Phosphate Battery Charger Evaluation Board?101.3 What the MCP73X23 Lithium Iron Phosphate Battery Charger Evaluation Board Kit Includes10Chapter 2. Installation and Operation112.1 Introduction112.2 Features112.3 Getting Started12Appendix A. Schematic and Layouts15A.1 Introduction15A.2 Board – Schematic16A.3 Board – Top Layer17A.4 Board – Top Metal Layer18A.5 Board – Bottom Layer19Appendix B. Bill Of Materials (BOM)21Worldwide Sales and Service22Size: 280 KBPages: 22Language: EnglishOpen manual
Data SheetTable of Contents1.0 Electrical Characteristics42.0 Typical Performance Curves7FIGURE 2-1: Battery Regulation Voltage (VBAT) vs. Supply Voltage (VDD).7FIGURE 2-2: Battery Regulation Voltage (VBAT) vs. Supply Voltage (VDD).7FIGURE 2-3: Battery Regulation Voltage (VBAT) vs. Supply Voltage (VDD).7FIGURE 2-4: Battery Regulation Voltage (VBAT) vs. Ambient Temperature (TA).7FIGURE 2-5: Battery Regulation Voltage (VBAT) vs. Ambient Temperature (TA).7FIGURE 2-6: Charge Current (IOUT) vs. Programming Resistor (RPROG).7FIGURE 2-7: Charge Current (IOUT) vs. Supply Voltage (V).8FIGURE 2-8: Charge Current (IOUT) vs. Supply Voltage (V).8FIGURE 2-9: Charge Current (IOUT) vs. Supply Voltage (V).8FIGURE 2-10: Charge Current (IOUT) vs. Programming Resistor (RPROG).8FIGURE 2-11: Charge Current (IOUT) vs. Ambient Temperature (TA).8FIGURE 2-12: Output Leakage Current (IDISCHARGE) vs. Ambient Temperature (TA).8FIGURE 2-13: Overvoltage Protection Start (50 ms/Div).9FIGURE 2-14: Overvoltage Protection Stop (50 ms/Div).9FIGURE 2-15: Load Transient Response (ILOAD = 50 mA, Output Ripple: 100 mV/Div, Output Current: 50 mA/Div, Time: 100 µs/Div).9FIGURE 2-16: Complete Charge Cycle (1100 mAh LiFePO4 Battery).9FIGURE 2-17: Line Transient Response (ILOAD = 10 mA, Source Voltage: 2V/Div, Output Ripple: 100 mV/Div, Time: 100 µs/Div).9FIGURE 2-18: Line Transient Response (ILOAD = 100 mA, Source Voltage: 2V/Div, Output Ripple: 100 mV/Div, Time: 100 µs/Div).93.0 Pin Description10TABLE 3-1: Pin Function Table103.1 Battery Management Input Supply (VDD)103.2 Battery Charge Control Output (VBAT)103.3 No Connect (NC)103.4 Status Output (STAT)103.5 Battery Management 0V Reference (VSS)103.6 Current Regulation Set (PROG)103.7 Exposed Pad (EP)104.0 Device Overview11FIGURE 4-1: The MCP73123/223 Flow Chart.115.0 Detailed Description125.1 Undervoltage Lockout (UVLO)125.2 Overvoltage Protection (OVP)125.3 Charge Qualification125.4 Preconditioning125.5 Constant Current Mode – Fast Charge12TABLE 5-1: Resistor Lookup Table135.6 Constant Voltage Mode135.7 Charge Termination135.8 Automatic Recharge135.9 Thermal Regulation14FIGURE 5-1: Thermal Regulation.145.10 Thermal Shutdown145.11 Status Indicator14TABLE 5-2: Status Outputs145.12 Battery Short Circuit Protection146.0 Applications15FIGURE 6-1: Typical Application Circuit.15FIGURE 6-2: Typical Charge Profile for Single-Cell LiFePO4 Battery.156.1 Application Circuit Design16TABLE 6-1: MLCC Capacitor Example166.2 PCB Layout Issues17FIGURE 6-3: Typical Layout (Top).17FIGURE 6-4: Typical Layout (Top Metal).17FIGURE 6-5: Typical Layout (Bottom).177.0 Packaging Information187.1 Package Marking Information18Appendix A: Revision History23Product Identification System25Trademarks27Worldwide Sales and Service28Size: 1.16 MBPages: 28Language: EnglishOpen manual
