SC445Q中文资料High Efficiency Integrated Driver for 4-Strings of 150mA LEDs数据手册Semtech规格书

描述 Description

The SC445 is a high-efficiency multiple string WLED driver with an integrated boost converter.

特性 Features

• Wide input voltage range from 4.5V to 27V
• Sustain fast Vin fluctuation up to 5v/μs
• 42V maximum output voltage
• Drives up to 40 WLEDs in 4 strings
• Programmable LED current for up to 150mA per string
• +/- 2% string-to-string current matching
• Up to 90% efficiency
• Wide 0.2% to 100% PWM dimming range
• Enable analog dimming
• Integrated 3.0A power switch
• 700KHz switching frequency for small size
• Adjustable OVP for cost-effective output cap selection
• Open/short LED protection
• Short LED protection enable/disable
• Thermal protection with auto-recovery
• Thermally enhanced TSSOP-20 EDP package
• Lead-free, Halogen-Free and WeEE/RoHS Compliant

应用 Application

·Medium-sized LCD panel

·Notebook Display

·Automotive Car Navigation Display

·Sub-Notebook and Tablet Computer Displays

·Portable Media Players