A8512是用于背光液晶显示器和电视的多输出WLED/RGB驱动程序。它集成了一个boost控制器来驱动外部MOSFET,和六个内部电流接收器。升压变换器工作在恒频(可编程)电流模式控制。PWM调光允许LED电流在500:1的比例控制。LED接收器电流由外部R_ISET电阻设置(见右图)。多个LED汇流槽可以组合在一起,以达到更高的电流每个LED串。多个A8512s可以并联连接,一个主控制器控制升压级,多达五个从控制器,作为LED汇点。这允许最多36个LED串由一个boost变换器供电。A8512的工作电压为8至24伏特。它提供了对过压、开路或短路LED串和过温的保护。 A dual level cycle-by-cycle current limit function provides soft start and protects against overloads. The device is provided in a 24-pin SOICW package (LB), with internally fused pins for enhanced thermal dissipation, and a 28-contact 5 mm × 5 mm QFN package (ET) and a 24-pin TSSOP package (LP), both with an exposed thermal pad for enhanced thermal dissipation. All packages are lead (Pb) free, with 100% matte tin leadframe plating.