Microchip Technology MCP1662 LED Lighting Drivers
Microchip Technology MCP1662 LED Lighting Drivers are compact, space-efficient, fixed-frequency, non-synchronous step-up converters. These LED drivers are optimized to drive LED strings with a constant current from two/three-cell alkaline or Lithium energizers, NiMH/NiCd, or one-cell Lithium-Ion/Li-Polymer batteries. The MCP1662 lighting drivers blend a 36V and 800mΩ low-side switch protected by 1.3A cycle-by-cycle inductor peak current limit operation. The LED lighting drivers feature an Undervoltage Lockout (UVLO) that avoids start-up with low inputs or discharged batteries for two-cell-powered applications. These MCP1662 drivers offer open load protection. Typical applications include camera flash, medical equipment, LED flashlights, and backlight current source.
Features
- 36V and 800mΩ integrated switch
- Up to 92% efficiency
- Drive LED strings in constant current
- 1.3A peak input current limit
- 2.4V to 5.5V input voltage range
- 300mVFB feedback voltage references
- Undervoltage lockout (UVLO)
- 2.3VIN (typical) rising
- 1.85VIN (typical) falling
- Sleep mode with 20nA (typical) quiescent current
- 500kHz switching frequency PWM operation
- Cycle-by-cycle current limiting
- Internal compensation
- Open Load Protection (OLP) in the event of:
- Feedback pin shorted to GND
- Disconnected LED string
- Overtemperature protection
Applications
- Two- and three-cell alkaline or NiMH/NiCd white LED drivers for backlighting products
- Li-Ion battery LED lighting application
- Camera flash
- LED flashlights and backlight current source
- Medical equipment
- Portable devices:
- Handheld gaming devices
- GPS navigation systems
- LCD monitors
- Portable DVD players
Block Diagram
Typical Application Circuit
View Display Click Boards
Mikroe Display Click Boards
Allow for adding LCD, OLED, and various other display options for applications and designs.
Inilathala: 2019-12-24
| Na-update: 2023-06-12