Microchip logo
  • All
  • Products
  • Documents
  • Applications Notes
product primary image

MCP1662

High Voltage Output Boost LED Constant Current Regulator

Status: In Production

Features:

  • Up to 92% Efficiency
  • High Output Voltage Range: up to 32V
  • 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
  • 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
  • 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
View More
Overview
Documents
Development Environment
RoHS Information
Buy Now

Device Overview

Summary

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.

Additional 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
    • Input Voltage Range: 2.4V to 5.5V
    • Undervoltage Lockout (UVLO):
      • 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)
    • Overtemperature Protection 
    • Available Packages: 5-Lead SOT-23 or 2x3 8-Lead TDFN
Parametrics
Name
Value
Regulator Type
Step Up (Boost)
Input Voltage Range Min (V)
2.4
Input Voltage Range Max (V)
5.5
Output Voltage Range Max (V)
32
Output Current (mA) max
200
Quiescent Current (mA) typ
0.25
Switching Frequency (kHz)
500
Operating Temp Range
-40 to 125
Vfb (V)
0.3
Duty Cycle Max (%)
90
SHUTDOWN Current (µA) (Typ)
0.02
Switch current (A) typ
1.3

Documents

Jump to:

Data Sheet

09/30/2015
761KB

Development Environment

  • Demo & Evaluation Boards
  • Application Examples
Demo & Evaluation Boards
MCP1662 Evaluation Board
MCP1662 Evaluation Board ( ADM00555 )

The MCP1662 LED Driver Evaluation Board is used to evaluate and demonstrate Microchip Technology’s MCP1662 product. This board demonstrates the MCP1662 in a boost-converter application supplied by two AA batteries, or from an external voltage source, which drives a string of LEDs with three selectable currents: 30 mA, 60 mA and 90 mA. The output current can be changed with a dual switch that...

Learn More
Add To Cart

RoHS Information

Part Number
Device Weight (g)
Shipping Weight (Kg)
Lead Count
Package Type
Package Width
Solder Composition
JEDEC Indicator
RoHS
China EFUP
MCP1662T-E/MNY
0.014300
0.248485
8
TDFN
2x3x0.8mm
NiPdAu
e4
MCP1662T-E/OT
0.016000
0.049000
5
SOT-23
-
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.

Buy from the Microchip Store

Grid
View
Table
View
Filter:
Apply
Clear
Only show products with samples
Product
Leads
Package Type
Temp Range
Packing Media
5K Pricing
Buy