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Part Number: ADM00435
MCP1643 SYNCHRONOUS BOOST LED CONSTANT CURRENT REGULATOR EVALUATION BOARD
- It can be powered by one-cell Alkaline, NiCd, or NiMH batteries, or by external power supply
- Input voltage range, VIN: 0.35V to 2.5V, with VIN < VOUT
- Start-up voltage: 0.65V
- Fixed output current: 25 mA 50 mA, 75 mA or 100 mA, selected using a mini-dip switch on board
- PWM Switching Frequency: 1 MHz
- Enable state selectable using mini-dip switch on board
- 1.6A Peak Input Current Limit
- Over-temperature Protection (if the die temperature exceeds 150°C, 25°C hysteresis)
- Mechanical battery reverse polarity protection
Overview
Four output currents can be selected: 25, 50, 75 and 100mA. The output current can be changed with a dual switch that changes the external LED current sense equivalent resistance. An enable switch is used to enable and disable the converter. When enabled, the MCP1643 will regulate the output current; when disabled, the MCP1643 disconnects the path from input to output for “true-disconnect”. In this state, the current consumed from the battery is 1 µA, typically.
Devices Supported: MCP1643
Package Contents
1x MCP1643 Synchronous Boost LED Constant Current Regulator Evaluation Board (ADM00435)