NXP SSL21081 LED驱动器参考设计
NXP公司的SSL2108x系列是用于通用照明的高压LED驱动器,效率高达95%,具有低成本的材料清单(BOM)和小的PCB占位面积,容易实现紧凑的解决方案. SSL2108x系列集成了欠压锁住(UVLO),前沿消隐(LEB),过流保护(OCP),绕组短路保护(SWP)和内部超温保护(OTP).本文介绍了SSL2108X主要特性和优势,方框图,几种应用电路以及SSL21081 LED驱动器参考板主要特性,电路图和材料清单.
The SSL2108X is a range of high-voltage Integrated Circuits (ICs), intended to drive LED lamps in general lighting applications.
The main benefits of the product family are:
•Small Printed-Circuit Board (PCB) footprint, and compact solution
•High efficiency (up to 95 %)
•Ease of integration
•Low electronic Bill Of Material (BOM)
The product family is made of ICs with a range of internal HV switches for easy power scaling.
The ICs work as boundary conduction mode converters, typically in buck configuration. The IC range has been designed to start up directly from the HV supply by an internal high-voltage current source. Thereafter, the dV/dt supply is used with capacitive coupling from the drain, or any other auxiliary supply. This functionality provides full flexibility in the application design. The IC consumes 1.3 mA of supply current with an internal clamp limiting the supply voltage...
