Microchip Technology Inc

MCP73871 Demo Board with Voltage Proportional Current Control

Part Number: mcp73871dm-vpcc

The MCP73871 Demo Board with Voltage Proportional Current Control is designed to demonstrate Microchip's stand-alone linear Li-Ion battery charger with system power path and load sharing management control solution. The MCP73871 integrates the required elements to meet design challenges when developing new Li-Ion / Li-Polymer batteries powered products.

The MCP73871 Demo Board with Voltage Proportional Current Control is designed to deliver minimum 1.5A total current to system load and to a single cell Li-Ion battery at 4.2V preset voltage regulation (4.1V, 4.35V and 4.4V options are also available for MCP73871). The board has a dip switch helping to decides the input power source between AC-DC wall adapter and USB port (AC/USB) and control input current limits, enable charge timer and enable charging.

The MCP73871 Demo Board with Voltage Proportional Current Control comes with a factory preset low-battery indicator (LBO) when input is absent. The preset value is 3.2V and STAT1 LED (green) with turn ON if the battery voltage is below the threshold voltage.

    • Integrated System Load Sharing
    • Input Current Limit Control hardware selected (typical 1650 mA, USB-High
    • Three LEDs to indicate charge status, low battery and power good signal
    • Preset Li-Ion battery charge voltage: 4.2V ± 0.5%
    • Temperature monitoring (is disabled by default)
    • Factory preset 0.1C preconditioning current of deeply depleted cells
    • Factory preset Safety Timer with Timer Enable feature
    • Constant Current/Constant Voltage (CC/CV) charge algorithm
    • Resistor programmed maximum charge current: 1A
    • Resistor programmed termination set point: 100 mA
    • Automatic Charge Termination
    • Automatic Recharge
    • Internal Thermal Regulation
    The MCP73871 Demo Board with Voltage Proportional Current Control is designed to demonstrate Microchip's stand-alone linear Li-Ion battery charger with system power path and load sharing management control solution. The MCP73871 integrates the required elements to meet design challenges when developing new Li-Ion / Li-Polymer batteries powered products.

    The MCP73871 Demo Board with Voltage Proportional Current Control is designed to deliver minimum 1.5A total current to system load and to a single cell Li-Ion battery at 4.2V preset voltage regulation (4.1V, 4.35V and 4.4V options are also available for MCP73871). The board has a dip switch helping to decides the input power source between AC-DC wall adapter and USB port (AC/USB) and control input current limits, enable charge timer and enable charging.

    The MCP73871 Demo Board with Voltage Proportional Current Control comes with a factory preset low-battery indicator (LBO) when input is absent. The preset value is 3.2V and STAT1 LED (green) with turn ON if the battery voltage is below the threshold voltage.