Microchip's Battery Management Solutions
Single Chip Battery Charging
and Management for Lithium Ion
The MCP73871 device is a 1A fully integrated linear solution for system load sharing and Li-Ion / Li-Polymer battery charge management with AC-DC wall adapter and USB port power sources selection. It’s also capable of autonomous power source selection between input or battery. The MCP73871 device employs a constant current/constant voltage (CC/CV) charge algorithm with selectable charge termination point. The constant voltage regulation is fixed with four available options: 4.10V, 4.20V, 4.35V, or 4.40V.
Mixed Signal PIC® Microcontroller
Based Solutions
The PIC16F785 Flash Microcontroller offers all of the advantages of the well-recognized mid-range x14 architecture with standardized features including a wide operating voltage of 2.0-5.5 Volts, on-board EEPROM Data Memory and nanoWatt Technology. Analog peripherals include up to 12 channels of 10-bit A/D, 2 operation amplifiers, 2 high-speed analog comparators, and a Bandgap Voltage Reference. Digital peripherals include a standard Capture/Compare/PWM (CCP) module, a 2-phase PWM with asynchronous feedback, a 16-bit timer and 2 8-bit timers.
Key Points:
- MCP73841/2/3/4 devices are ideal for applications utilizing high-capacity Li-Ion and Li-Polymer batteries. The external FET allows for flexibility and higher allowable power dissipation, which translates to shorter charging time and easier thermal design.
- MCP73861/2 devices are ideal for applications requiring a high level of integration. This family integrates the pass transistor, the blocking diode and the current sense resistor, thereby minimizing the number of external components.
- MCP73841/3 and MCP73861 are for applications utilizing single-cell battery packs.
- MCP73842/4 and MCP73862 are for applications utilizing dual-cell battery packs.
