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Datasheet Microchip MCP1643-I/MSVAO

ManufacturerMicrochip
SeriesMCP1643
Part NumberMCP1643-I/MSVAO

MCP1643 is a compact, high-efficiency, fixed frequency, synchronous step-up LED driver with constant current, that operates from one and two-cell alkaline and NiMH/NiCd batteries

Datasheets

  • Download » Datasheet PDF, 745 Kb, Revision: 08-20-2013
    MCP1643 Data Sheet
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    MCP1643
    1 MHz Low Start-up Voltage Synchronous Boost
    LED Constant Current Regulator
    Features Description 1.6A Typical Peak Input Current Limit Up to 550 mA LED Load Current Low Start-up Voltage: 0.65V (typical, 25 mA LED
    Current) Low Operating Input Voltage: down to 0.5V Maximum Input Voltage < VLED < 5.0V Maximum Output Voltage:
    -5.0V
    -Overvoltage Protection Low Reference Voltage:
    -VFB = 120 mV
    -Minimal Power Loss on Sense Resistor Pulse-Width Modulation Mode Operation (1 MHz) Internal Synchronous Rectifier Internal Compensation Inrush Current Limiting Internal Soft-Start (240 Вµs typical) Shutdown (EN = GND):
    -True Load Disconnect
    -Dimming Control by Variable Duty Cycle Shutdown Current: 1.2 ВµA (typical) Overtemperature protection Packages:
    -MSOP-8
    -2x3 DFN-8 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. Applications One and Two Cell Alkaline and NiMH/NiCd
    Portable LED Lighting Products LED Flashlight and Head Lamps Rechargeable Flashlights Wall LED Lamps with Motion Detectors LED supply for backlights General LED constant current applications Low-voltage technology allows the regulator to start up
    without high-output voltage and load-current overshoot
    from a low 0.65V input. High efficiency is accomplished
    by integrating the low resistance N-Channel Boost
    switch and synchronous P-Channel switch. All ...

Prices

Status

Lifecycle StatusProduction (Appropriate for new designs but newer alternatives may exist)

Packaging

PackageMSOP
Pins8

Parametrics

Automotive QualYes
Duty Cycle Max90 %
Input Voltage Range Max5 V
Input Voltage Range Min(V)0.5
Light Load Efficiency ModeNo
Operating Temperature Range-40 to 85 °C
Output Voltage Range Max5 V
Output Voltage Range Min0.6 V
Quiescent Current0.03 mA) typ
SHUTDOWN Current1.2 µA
Switch current1.8 A) typ
Switching Frequency1000 kHz
Synchronous RectifierYes
Vfb0.12 V

Eco Plan

RoHSCompliant

Moldel Line

Series: MCP1643 (6)

Manufacturer's Classification

  • Power Management > Switching Regulators > Step Up (Boost) - Synchronous Products

Other Names:

MCP1643I/MSVAO, MCP1643 I/MSVAO

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