MCP1631RD-MCC2 Microchip Technology, MCP1631RD-MCC2 Datasheet - Page 11

• Manufacturer Part Number: MCP1631RD-MCC2
• Description: REFERENCE DESIGN MCP1631HV
• Manufacturer: Microchip Technology

Specifications of MCP1631RD-MCC2

• Main Purpose: Power Management, Battery Charger
• Embedded: Yes, MCU, 8-Bit
• Utilized Ic / Part: MCP1631HV, PIC16F883
• Primary Attributes: 1 ~ 2 Cell- Li-Ion, 1 ~ 5 Cell- NiCd/NiMH, 1 ~ 2 1W LEDs
• Secondary Attributes: Status LEDs
• Silicon Manufacturer: Microchip
• Application Sub Type: Battery Charger
• Kit Application Type: Power Management - Battery
• Silicon Core Number: MCP1631HV, PIC16F883
• Kit Contents: Board
• Lead Free Status / RoHS Status: Lead free / RoHS Compliant
• Lead Free Status / RoHS Status: Lead free / RoHS Compliant

2.1
2.2
2.3
© 2009 Microchip Technology Inc.
INTRODUCTION
FEATURES
GETTING STARTED
Chapter 2. Installation and Operation
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.
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
• Complete “C” source code is provided
The MCP1631HV Multi-Chemistry Battery Charger is fully assembled and tested for
charging one or two series Li-Ion Batteries, one to five series cell NiMH or NiCd
batteries, or driving one to two 1 Watt LEDs. The charge termination for Li-Ion is based
upon a percentage of fast charge current, the charge termination for NiMH is based on
a negative voltage change versus time or positive temperature change versus time.
This board requires the use of an external voltage source to charge the series
connected batteries with a range of +5.3V to +16V input. An external load and
thermistor is also required to evaluate the charger reference design.
Li-Ion)
MCP1631HV MULTI-CHEMISTRY
REFERENCE DESIGN
BATTERY CHARGER
DS51791A-page 7