BCT3611S

1 Watt White LED Driver For Li-ion Rechargeable Battery

General Description

The BCT3611S is a switching control current regulator designed specially for 1 watt white LED driver with max 450mA dc current. The BCT3611S is intended for use with Li-ion rechargeable battery as the power source. The mode switches from continuous to flash mode is easily accommodated by main power switch to minimize the risk of battery leakage and corrosion. The internal thermal protection circuit will activate by cutting the output current in half if the chip temperature go above 110 ºC.

Features

• Current regulator irrelevant to the LED forward voltage
• Wide input voltage range: 2.2V to 4.3V
• Enter flash mode without hardware switch: Flash mode is enabled by power switch ON, then OFF -> ON within ~1 Second
• Maximum output current: 450mA
• Integrated thermal protection circuit
• On Chip Oscillator
• Low power consumption
• Wide operation
• temperature:
  -20 ºC to 70 ºC
• Output current adjustable by external resistor at pin CS
• SHDN can be used for dimming or shut down control by MCU
• Available in Pb-free SOP8-PP

Applications

• High power white LED Torch
• White LED driver for mobile phone
• Handheld Electronics
• Lighting Applications

Package

Circuit Diagram

Full Datasheet Download [pdf]