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Details for ADM00641 by Microchip Technology
Education Maker & Hobbyist Electronics > Development Boards & Evaluation Kits > Lighting Development Kits
ADM00641
Buy Directly from Microchip Technology Inc (125 in stock) $85.0000
EVAL BOARD MCP1664 LED DRIVER
ADM00641 image

ADM00641 by Microchip Technology

EVAL BOARD MCP1664 LED DRIVER
Features
1.8A Peak Input Current Limit:
Available Packages:
Cycle-by-Cycle Current Limiting
Disconnected LED String (Prevent Overvoltage to the Converteru2019s Output and SW Pin)
Drive LED Strings in Constant Current
Feedback Pin Shorted to GND (Prevent Excessive Current into LEDs)
ILED up to 150 mA at 4.2V VIN, 8 White LEDs
ILED up to 200 mA at 3.3V VIN, 4 White LEDs
ILED up to 300 mA at 5.0V VIN, 4 White LEDs
Input Voltage Range: 2.4V to 5.5V
Internal Compensation
Open Load Protection (OLP) in the event of:
Overtemperature Protection
PWM Operation: 500 kHz Switching Frequency
Shutdown Current (EN = GND): 40 nA Typical
UVLO at VIN Falling: 1.85V, typical
UVLO at VIN Rising: 2.3V, typical
Undervoltage Lockout (UVLO):
Up to 92% Efficiency
Part Information
ADM00641 image
RoHS Compliant
Description
The MCP1664 is a compact, space-efficient, fixed-frequency, non-synchronous step-up converter optimized to drive multiple strings of LEDs with constant current powered from two and three-cell alkaline or NiMH/NiCd as well as from one-cell Li-Ion or Li-Polymer batteries. The device integrates a 36V, 400 m low-side switch, which is protected by the 1.8A cycle-by-cycle inductor peak current limit operation. The MCP1664 starts up without high inrush current or output overshoot. All compensation and protection circuitry is integrated to minimize the number of external components. The internal feedback (VFB) voltage is set to 300 mV for low power dissipation when sensing and regulating the LED current. A single resistor sets the LED current. The device features an UVLO which avoids start-up with low inputs or discharged batteries for two cell-powered applications. The MCP1664 features an open load protection (OLP) which turns off the operation in situations when the LED string is accidentally disconnected or the feedback pin is short-circuited to GND. While in Shutdown mode (EN = GND), the device stops switching, and consumes 40 nA typical of input current.
Specifications
Device Topology:
Boost (Step Up)
No. of Outputs:
1Outputs
Output Current:
270mA
Output Voltage:
32V
Input Voltage Min:
2.4V
Input Voltage Max:
5.5V
Core Chip:
MCP1664
Dimming Control Type:
PWM
Kit Contents:
Eval Board MCP1664
Product Range:
-
SVHC:
No SVHC (15-Jan-2018)
Alternate Descriptions
EVALUATION BOARD, MCP1664 LED DRIVER; Device Topology:Boost (Step Up); No. of Outputs:1Outputs; Output Current:270mA; Output Voltage:32V; Input Voltage Min:2.4V; Input Voltage Max:5.5V; Core Chip:MCP1664; Dimming Control Type:PWM RoHS Compliant: NA Newark Electronics
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