MCP1662

The MCP1662 device is a compact, space-efficient, fixed-frequency, non-synchronous step-up converter optimized to drive LED strings with constant current from two and three-cell alkaline and NiMH/NiCd or one-cell Li-Ion or Li-Polymer batteries.
The device integrates a 36V, 800 mΩ low-side switch, which is protected by the 1.3A cycle-by-cycle inductor peak current limit operation. Low-voltage technology allows the MCP1662 to start-up without high inrush current or output overshoot. All compensation and protection circuitry is integrated to minimize the number of external components.

Features
  • Up to 92% Efficiency
  • High Output Voltage Range: up to 32V
  • 1.3A Peak Input Current Limit: ILEDup to 200 mA @ 5.0V VIN, 4 White LEDs ILED up to 125 mA @ 3.3V VIN, 4 White LEDs ILED up to 100 mA @ 4.2V VIN, 8 White LEDs
  • ILEDup to 200 mA @ 5.0V VIN, 4 White LEDs
  • ILED up to 125 mA @ 3.3V VIN, 4 White LEDs
  • ILED up to 100 mA @ 4.2V VIN, 8 White LEDs
  • Input Voltage Range: 2.4V to 5.5V
  • Undervoltage Lockout (UVLO): UVLO@VIN Rising:  2.3V, typical UVLO@VIN Falling: 1.85, typical
  • UVLO@VIN Rising:  2.3V, typical
  • UVLO@VIN Falling: 1.85, typical
  • No Load Input Current: 250 µA, typical
  • Sleep mode with 200 nA Typical Quiescent Current
  • PWM Operation with Skip mode: 500 kHz
  • Feedback Voltage Reference: VFB= 300 mV
  • Cycle-by-Cycle Current Limiting
  • Internal Compensation
  • Inrush Current Limiting and Internal Soft-Start
  • Output Overvoltage Protection (OVP) in the event of: Feedback Pin Shorted to GND (Prevent Excessive Current into LEDs) Disconnected LED String (Prevent Overvoltage to the Converter’s Output and SW Pin)
  • Feedback Pin Shorted to GND (Prevent Excessive Current into LEDs)
  • Disconnected LED String (Prevent Overvoltage to the Converter’s Output and SW Pin)
  • Overtemperature Protection
  • Available Packages: 5-Lead SOT-23 or 2x3 8-Lead TDFN
Parameter
Parameter Name Value Value
Regulator Type Step Up (Boost) Step Up (Boost)
Input Voltage Range Min (V) 2.4 2.4
Input Voltage Range Max (V) 5.5 5.5
Output Voltage Range Max (V) 32 32
Quiescent Current (mA) typ 0.25 0.25
Switching Frequency (kHz) 500 500
Operating Temp Range -40 to 125 -40 to 125
Vfb (V) 0.3 0.3
Duty Cycle Max (%) 90 90
SHUTDOWN Current (µA) (Typ) 0.02 0.02
Switch current (A) typ 1.3 1.3
Documents
MCP1662 Data SheetData Sheets09/30/2015761KB
AN2041 - Battery-Powered Constant Current LED DriversAppNote12/18/2015435KB
MCP1662 LED Driver Evaluation Board User's GuideUser Guides07/01/2014398KB
Ordering Information
Part NumberLeadsPackage TypeTemp RangePacking1+26+100+1000+5000+
MCP1662T-E/MNY8TDFN-40C to +125CT/R1.010.840.760.740.73
MCP1662T-E/OT5SOT-23-40C to +125CT/R1.010.840.760.740.73
相关开发工具
RoHS Information
PartNumberDeviceWeightShippingWeightLeadCountPackageTypePackageWidthSolderCompositionJEDECIndicatorRoHSChinaEFUP
MCP1662T-E/OT0.0160000.0490005SOT-23-Matte Tine3
MCP1662T-E/MNY0.0143000.2484858TDFN2x3x0.8mmNiPdAue4
MCP1662 Data Sheet MCP1662
MCP1662 Data Sheet ADM00555
AN2041 MCP1664
MCP1662 LED Driver Evaluation Board User's Guide ADM00555