MCP1631RD-DCPC1 Microchip Technology, MCP1631RD-DCPC1 Datasheet - Page 11

• Manufacturer Part Number: MCP1631RD-DCPC1
• Description: REF DES BATT CHARG OR LED DRIVER
• Manufacturer: Microchip Technology

Specifications of MCP1631RD-DCPC1

• Current - Output / Channel: 700mA
• Outputs And Type: 1, Non-Isolated
• Features: Firmware for Li-Ion, NiMH, and NiCd Battery Charger
• Voltage - Input: 3.5 ~ 16 V
• Utilized Ic / Part: MCP1631HV, PIC16F616
• Core Chip: MCP1631HV, PIC16F616
• Topology: Parallel, Series
• Output Current: 1A
• No. Of Outputs: 1
• Input Voltage: 3.5V To 16V
• Dimming Control Type: Analog
• Kit Contents: Board
• Lead Free Status / RoHS Status: Lead free / RoHS Compliant
• Voltage - Output: -
• Lead Free Status / Rohs Status: Lead free / RoHS Compliant

2.1
2.2
© 2009 Microchip Technology Inc.
INTRODUCTION
FEATURES
Chapter 2. Installation and Operation
The MCP1631HV Digitally Controlled Programmable Current Source Reference
Design demonstrates Microchip’s MCP1631HV high-speed Pulse Width Modulator
(PWM) used in LED lighting and multi-chemistry battery charger applications. When
used in conjunction with a microcontroller, the MCP1631HV will control the power
system duty cycle to provide output voltage or current regulation. A PIC16F616
microcontroller is used to provide the MCP1631HV switching frequency oscillator and
reference voltage. The MCP1631HV generates a duty cycle and provides fast
overcurrent protection based upon the feedback and current sense inputs.
MCP1631HV external signals include the input oscillator, the reference voltage, the
feedback voltage and the current sense. The MCP1631HV generates a square-wave
output signal to drive the powertrain switch. The power train used for the MCP1631HV
Digitally Controlled Programmable Current Source Reference Design is a
Single-Ended Primary Inductive Converter (SEPIC). The PIC16F616 microcontroller is
programmable, allowing the user to modify or develop their own firmware routines to
further evaluate the MCP1631HV Digitally Controlled Programmable Current Source
Reference Design in this application.
The MCP1631HV Digitally Controlled Programmable Current Source Reference
Design has the following features:
• Input Operating Voltage Range: +3.5V to +16V
• Firmware default output current of 700 mA with dimming ratio 10:1 (70 mA/step)
• Maximum output current of 1000 mA
• Maximum output power of 8.5W
• Drive one or more LEDs
• Firmware for charging Li-Ion, NiMH, and NiCd batteries
• ON/OFF/Dimming switch
• Status and fault indication
• Hardware and software overvoltage protection (OVP) set to 9.0V. The software
value can be modified in the source code to be less than 9.0V
MCP1631HV DIGITALLY CONTROLLED
PROGRAMMABLE CURRENT SOURCE
REFERENCE DESIGN
DS51798A-page 7