MCP1630RD-NMC1: 3 NiMH Cells, 6 ~ 14V in

The MCP1630 Low-Cost NiMH Battery Charger Reference Design demonstrates Microchip’s high-speed Pulse Width Modulator (PWM) (the MCP1630) used in a battery charger application. The MCP1630 is fully assembled and tested for charging three series cell NiMH batteries. When used in conjunction with a microcontroller, the MCP1630 will control the power system duty cycle to provide output voltage or current regulation.

The PIC12F683 microcontroller can be used to regulate output voltage or current, switching frequency and maximum duty cycle. The MCP1630 generates duty cycle and provides fast overcurrent protection based off various external inputs.

External signals include the input 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 MCP1630 Low-Cost NiMH Battery Charger Reference Design is a Single-Ended Primary Inductive Converter (SEPIC).The PIC12F683 microcontroller is programmable, allowing the user to modify or develop their own firmware routines to further evaluate the MCP1630 Low-Cost NiMH Battery Charger Reference Design in this application.