Microchip MCP1631 | Demoboard MCP1631RD-MCC2

Description

The MCP1631HV Multi-Chemistry Battery Charger demonstrates Microchip’s high-speed Pulse Width Modulator (PWM), MCP1631HV, used in a multi-chemistry battery charger application. When used in conjunction with a microcontroller, the MCP1631HV will control the power system duty cycle to provide output voltage or current regulation. The PIC16F883 microcontroller can be used to regulate output voltage or set current, switching frequency and maximum duty cycle.The MCP1631HV generates the duty cycle and provides fast overcurrent protection based upon various external inputs. External signals include the switching frequency oscillator, the reference voltage, the feedback voltage and the current sense. The output signal is a square-wave pulse. The power train used for the MCP1631HV Multi-Chemistry Battery Charger is a Single-Ended Primary Inductive Converter (SEPIC). The MCP1631HV microcontroller is programmable, allowing the user to modify or develop their own firmware routines to further evaluate the MCP1631HV Multi-Chemistry Battery Charger in this application.

Features

• The MCP1631HV Multi-Chemistry Battery Charger has the following features:
• Input Operating Voltage Range - +5.3V to +16V
• Maximum of 2A Charge Current for single cell Li-Ion
• Charge NiMH, NiCd or Li-Ion Chemistries
• Charge 1 cell or 2 cell Li-Ion Batteries in Series
• Charge 1 cell to 5 cell NiMH or NiCd Batteries in Series
• Drive one or two 1 Watt LEDs in series.
• Select Chemistry and Cells using push-buttons
• ON/OFF switch
• Charge Status Indication
• Programmable Charge Profile
• Programmable Overvoltage Shutdown (1.8V/Cell for NiMH/NiCd or 4.4V/Cell for Li-Ion)
• Complete “C” source code is provided

Typical applications

• Constant Current SEPIC Power Train Design
• LED Lighting Applications
• High Input Voltage Programmable Switching Battery Chargers / Supports Multiple Chemistries Li-Ion, NiMH, NiCd Intelligent and Pb-Acid / USB Input Programmable Switching Battery Chargers

More information

• Datasheet
• IC product information