MCP1631RD-DCPC1 Microchip Technology, MCP1631RD-DCPC1 Datasheet - Page 9

• 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

1.1
© 2009 Microchip Technology Inc.
INTRODUCTION
The MCP1631HV Digitally Controlled Programmable Current Source Reference
Design is used to drive and dim one or more power LEDs in a series or parallel topology
(depending on the LED’s capability). The reference design may also be used to charge
one to four cell NiMH/NiCd or one to two cell Li-Ion battery packs. The board uses the
MCP1631HV high-speed analog PWM controller and PIC16F616 microcontroller to
generate the proper dimming ratio for LEDs or charge algorithm for NiMH, NiCd and
Li-Ion batteries.
The MCP1631HV Digitally Controlled Programmable Current Source Reference
Design is used to evaluate Microchip’s MCP1631HV in a SEPIC power converter
application. The MCP1631HV Digitally Controlled Programmable Current Source
Reference Design is user programmable. Multiple user functions may be selected by
re-compiling the source code. The board can drive LEDs or charge NiMH, NiCd or
Li-Ion batteries with a maximum current of 1A. In Charger Mode, the MCP1631HV
Digitally Controlled Programmable Current Source Reference Design provides a
constant current charge (Ni-based chemistry) and constant current/constant voltage
(Li-Ion based chemistry) with preconditioning, cell temperature monitoring (for
Ni-based) and battery pack fault monitoring. In LED Driver mode, the MCP1631HV
Digitally Controlled Programmable Current Source Reference Design provides a
constant user defined current and a 10:1 dimming ratio. The dimming ratio and
maximum current can be selected before compiling the source code. The board has
LED indicators to provide multiple fault indication.
This chapter covers the following topics:
• What is the MCP1631HV Digitally Controlled Programmable Current Source
• What the MCP1631HV Digitally Controlled Programmable Current Source
FIGURE 1-1:
Reference Design Reference Design?
Reference Design Reference Design Kit includes.
Chapter 1. Product Overview
MCP1631HV DIGITALLY CONTROLLED
PROGRAMMABLE CURRENT SOURCE
Block Diagram.
MCP1631HV SEPIC
Power Supply
Programmable
Current Source
3.5V to 16V
+
-
REFERENCE DESIGN
THERMISTOR
+
-
DS51798A-page 5