Typical Three White LEDs Application Powered from One or Two Cells for MCP1643, 1MHz Low Start-up Voltage Synchronous Boost LED Constant Current Regulator

Typical Three White LEDs Application Powered from One or Two Cells for MCP1643, 1MHz Low Start-up Voltage Synchronous Boost LED Constant Current Regulator. MCP1643 is a compact, high-efficiency, fixed frequency, synchronous step-up converter optimized to drive one LED with constant current, that operates from one and two-cell alkaline and NiMH/NiCd batteries. The device can also drive two red/green/yellow series connection LEDs