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MCP73853 数据表(PDF) 17 Page - Microchip Technology |
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MCP73853 数据表(HTML) 17 Page - Microchip Technology |
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17 / 32 page  2004-2013 Microchip Technology Inc. DS21915C-page 17 MCP73853/55 6.0 APPLICATIONS The MCP7385X devices are designed to operate in conjunction with a host microcontroller or in stand- alone applications. The MCP7385X devices provide the preferred charge algorithm for Li-Ion/Li-Polymer cells. The algorithm uses a constant current followed by a constant voltage charging method. Figure 6-1 depicts a typical stand-alone application circuit, while Figure 6-2 and Figure 6-3 depict the accompanying charge profile. FIGURE 6-1: Typical Application Circuit. FIGURE 6-2: Typical Charge Profile. EN STAT1 VSET VSS3 VDD1 VDD2 VSS2 TIMER PROG VBAT3 VBAT2 VBAT1 CTIMER RPROG RT1 RT2 + - Single Lithium-Ion Cell VSS1 1 2 3 4 MCP73853 14 15 16 5678 9 10 11 12 13 Regulated Wall Cube or USB Power Bus Regulation Voltage (VREG) Regulation Current (IREG) Transition Threshold (VPTH) Precondition Current (IPREG) Precondition Safety Timer Fast Charge Safety Timer Elapsed Time Termination Timer Charge Voltage Preconditioning Mode Constant-current Mode Constant-voltage Mode Charge Current Termination Current (ITERM) |
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