MCP1643-ISLASHMC中文资料微芯科技数据手册PDF规格书

特性 Features

• Passes Automotive AEC-Q100 Reliability Testing

• 1.6A Typical Peak Input Current Limit

• Up to 550 mA LED Load Current

• Low Start-up Voltage: 0.65V (typical, 25 mA LED

Current)

• Low Operating Input Voltage: down to 0.5V

• Maximum Input Voltage < VLED < 5.0V

• Maximum Output Voltage:

- 5.0V

- Overvoltage Protection

• Low Reference Voltage:

- VFB = 120mV

- Minimal Power Loss on Sense Resistor

• Pulse-Width Modulation Mode Operation (1 MHz)

• Internal Synchronous Rectifier

• Internal Compensation

• Inrush Current Limiting

• Internal Soft-Start (240 μs typical)

• Shutdown (EN = GND):

- True Load Disconnect

- Dimming Control by Variable Duty Cycle

• Shutdown Current: 1.2 μA (typical)

• Overtemperature Protection

• Packages:

- MSOP-8

- 2 mm x 3 mm DFN-8

Applications

• One and Two Cell Alkaline and NiMH/NiCd

Portable LED Lighting Products

• LED Flashlight and Head Lamps

• Rechargeable Flashlights

• Wall LED Lamps with Motion Detectors

• LED supply for backlights

• General LED constant current applications