Evaluation Board for MCP1662 Step-up DC/DC Regulator
Manufactured By:Microchip
Part Number: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 changes the external LED current sense equivalent resistance (RSET). An enable switch is used to enable and disable the converter. When enabled, the MCP1662 will regulate the output current; when disabled, the current consumed from the battery by the device is typically less than 20 nA.
Applications:
- Two and Three-Cell Alkaline or NiMH/NiCd White LED Driver for Backlighting Product
- 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
Features
- It can be powered by two-cell Alkaline, NiCd, NiMH or Lithium AA cell batteries
- Input Voltage range (V IN ): 2.4V to 5.5V, with V IN < V OUT
- Undervoltage Lockout: 2.3V to Start; 1.85V to Stop
- Adjustable Output Current: 30 mA, 60 mA or 90 mA, selected using a dual switch on-board
- PWM Switching Frequency: 500 kHz
- Enable converter using switch on board
- 1.3A Peak Input Current Limit
- Overtemperature Protection (if the die temperature exceeds 150°C, with 15°C hysteresis)
- Open Load Protection in case of: LED fail or FB disconnected/fault
Ships With
- Evaluation Board