Microchip MCP1631HV

Description

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 converterapplication. 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 MCP1631HVDigitally 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.

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
• Single 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

More information

• Datasheet
• IC product information