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Datasheet Microchip MCP1643

ManufacturerMicrochip
SeriesMCP1643

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

MCP1643-I/MCMCP1643-I/MSMCP1643-I/MSVAOMCP1643T-I/MCMCP1643T-I/MSMCP1643T-I/MSVAO
Lifecycle StatusProduction (Appropriate for new designs but newer alternatives may exist)Production (Appropriate for new designs but newer alternatives may exist)Production (Appropriate for new designs but newer alternatives may exist)Production (Appropriate for new designs but newer alternatives may exist)Production (Appropriate for new designs but newer alternatives may exist)Production (Appropriate for new designs but newer alternatives may exist)

Packaging

Parametrics

MCP1643-I/MCMCP1643-I/MSMCP1643-I/MSVAOMCP1643T-I/MCMCP1643T-I/MSMCP1643T-I/MSVAO
Automotive QualYesYesYesYesYesYes
Duty Cycle Max, %909090909090
Input Voltage Range Max, V555555
Input Voltage Range Min(V)0.50.50.50.50.50.5
Light Load Efficiency ModeNoNoNoNoNoNo
Operating Temperature Range, °C-40 to +85-40 to +85-40 to 85-40 to +85-40 to +85-40 to 85
Output Voltage Range Max, V555555
Output Voltage Range Min, V0.60.60.60.60.60.6
Quiescent Current, mA) typ0.030.030.030.030.030.03
SHUTDOWN Current, µA1.21.21.21.21.21.2
Switch current, A) typ1.81.81.81.81.81.8
Switching Frequency, kHz100010001000100010001000
Synchronous RectifierYesYesYesYesYesYes
Vfb, V0.120.120.120.120.120.12

Eco Plan

MCP1643-I/MCMCP1643-I/MSMCP1643-I/MSVAOMCP1643T-I/MCMCP1643T-I/MSMCP1643T-I/MSVAO
RoHSCompliantCompliantCompliantCompliantCompliantCompliant

Moldel Line

Series: MCP1643 (6)

Manufacturer's Classification

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

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