描述 Description

The SC446 is a high-effciency multiple string WLED driver with an integrated boost converter. It operates over a wide input range from 4.5V to 27V with a maximum output voltage of 36V and a 2.5A internal power switch. It can drive up to thirty WLEDs in 3 strings with current up to 100mA per string.

特性 Features

·Wide input voltage range from 4.5V to 27V
·36V maximum output voltage
·Drives up to 30 WLEDs in 3 strings
·Programmable LED current for up to 100mA perstring
·+/- 2% string-to-string current matching
·Up to 90% efficiency
·Wide 0.2% to 100% PWM dimming range
·Possible analog dimming
·Integrated 2.5A power switch
·700kHz switching frequency for small size
·Adjustable OVP for cost-e!ective output cap selection
·Open/short LED protection
·Thermal protection with auto-recovery
·Thermally enhanced TSSOP-16 EDP package
·Pb Free, Halogen Free, andWEEE/RoHS Compliant

應(yīng)用 Application

·Medium-sized LCD panel
·Notebook Display
·Automotive Car Navigation Display
·Sub-Notebook and Tablet Computer Displays
·Portable Media Players

簡介

SC446屬于集成電路（IC）的LED驅(qū)動器。由制造生產(chǎn)的SC446LED 驅(qū)動器器件屬于 LED 驅(qū)動器電源管理集成電路 (PMIC) 系列，可通過標(biāo)稱固定電壓的電源為負(fù)載（通常為發(fā)光二極管）提供電流，并且電流可控。它與用于電壓調(diào)節(jié)的類似產(chǎn)品的主要區(qū)別在于，這類器件提供較低的反饋電壓（以提高系統(tǒng)能效），而且通?？蓪ζ骷ぷ鼽c(diǎn)進(jìn)行外部控制，可在照明應(yīng)用中用于實(shí)現(xiàn)調(diào)光功能。