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MCP1643

1MHz Low Start-up Voltage Synchronous Boost LED Constant Current Regulator

Status: In Production

Features:

  • 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
  • Pulse-Width Modulation Mode Operation (1 MHz)
  • Internal Synchronous Rectifier
  • Internal Compensation
  • Inrush Current Limiting
  • Internal Soft-Start (240 µs typical)
  • Shutdown (EN = GND): True Load Disconnect
  • Dimming Control by Variable Duty Cycle
  • Shutdown Current: 1.2 µA (typical)
  • Overtemperature protection
  • Packages:MSOP-8, 2x3 DFN-8
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Overview
Documents
Development Environment
RoHS Information
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Device Overview

Summary

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. The device can also drive two red/green/yellow series connection LEDs.

Additional Features
    • 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
    • Pulse-Width Modulation Mode Operation (1 MHz)
    • Internal Synchronous Rectifier
    • Internal Compensation
    • Inrush Current Limiting
    • Internal Soft-Start (240 µs typical)
    • Shutdown (EN = GND): True Load Disconnect
    • Dimming Control by Variable Duty Cycle
    • Shutdown Current: 1.2 µA (typical)
    • Overtemperature protection
    • Packages:MSOP-8, 2x3 DFN-8
Parametrics
Name
Value
Regulator Type
Step Up (Boost)
Input Voltage Range Min (V)
0.5
Input Voltage Range Max (V)
5
Output Voltage Range Min (V)
0.6
Output Voltage Range Max (V)
5
Output Current (mA) max
550
Quiescent Current (mA) typ
0.03
Switching Frequency (kHz)
1000
Synchronous Rectifier
Yes
Operating Temp Range
-40 to 85
Vfb (V)
0.12
Duty Cycle Max (%)
90
SHUTDOWN Current (µA) (Typ)
1.2
Switch current (A) typ
1.8
Automotive Qual
Yes

Documents

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Data Sheet

08/20/2013
727KB

Software Library

Development Environment

  • Demo & Evaluation Boards
  • Software Libraries
  • Application Examples
Demo & Evaluation Boards
MCP1643 0.5W LED Driver Demo Board
MCP1643 0.5W LED Driver Demo Board ( ADM00435 )

The MCP1643 Synchronous Boost LED Constant Current Regulator Evaluation Board is used to evaluate and demonstrate Microchip Technology’s MCP1643 device. This board demonstrates the MCP1643 in a boost converter application supplied by one AA battery, or from an external voltage source, which drives an LED with three selectable currents. This evaluation board was developed to help engineers...

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MCP1643 Boost RGB LED Driver Demo Board
MCP1643 Boost RGB LED Driver Demo Board ( ADM00612 )

The MCP1643 RGB LED Driver Demonstration Board is used to evaluate and demonstrate Microchip Technology’s MCP1643 product. This board demonstrates the MCP1643 in a boost LED driver application supplied by one AA battery, or from an external voltage source, which drives each color of the RGB LED separately at a frequency of 70Hz with a constant current of 350mA. The RGB LED is driven by a...

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Software Libraries
Analog Simulation - MCP1643

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. The device can also...

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RoHS Information

Part Number
Device Weight (g)
Shipping Weight (Kg)
Lead Count
Package Type
Package Width
Solder Composition
JEDEC Indicator
RoHS
China EFUP
MCP1643-I/MS
0.025600
0.070000
8
MSOP
3x3mm
Matte Tin
e3
MCP1643-I/MSVAO
0.025600
0.070000
8
MSOP
3x3mm
Matte Tin
e3
MCP1643T-I/MS
0.025600
0.215600
8
MSOP
3x3mm
Matte Tin
e3
MCP1643T-I/MSVAO
0.025600
0.215600
8
MSOP
3x3mm
Matte Tin
e3
MCP1643-I/MC
0.015600
0.033333
8
DFN
2x3x0.9mm
Matte Tin
e3
MCP1643T-I/MC
0.015600
0.130606
8
DFN
2x3x0.9mm
Matte Tin
e3
To see a complete listing of RoHS data for this device, please Click here
Shipping Weight = Device Weight + Packing Material weight. Please contact sales office if device weight is not available.

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