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集成 MOSFET , 满足高 PF 需求的 BCM LED 驱动控制器

RT8497

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RT8497 由集成化的功率 MOSFET 和 边界模式控制器构成,其用途是构成降压是转换器并通过对内部 MOSFET 的控制实现输出电流的稳定调节。RT8497 含有电流过零检测器,它可使其系统保持工作在边界临界模式,以此获得最优的转换效率,EMI 性能表现也会很好。借助内部的智能线电压补偿电路,它在实现了系统组件最少化的同时,还可获得高功率因数校正效果和很低的THDi,用它实现的电路,PCB 占用面积小,总体拥有成本很低。尤其特别的事,RT8497 可以支持用低成本的鼓形电感替代一般常用的EE磁芯电感,还能获得很高的效率。RT8497 的封装是 SOP-8。

应用

  • E27、PAR灯、灯条等离线式 LED 灯具
主要规格
RT8497 RT8497A RT8497B RT8497C RT8497D
Status Active Active Active Active Active
Supply Voltage (min) (V) 10 10 10 10 10
Supply Voltage (max) (V) 30 30 30 30 30
Topology Buck Buck Buck Buck Buck
Output C.C. C.C. C.C. C.C. C.C.
MOSFET Integrated Yes Yes Yes Yes Yes
PFC Y Y Y Y Y
Current Sense Threshold (mV) 250 250 250 250 250
Features LED Open Protection;LED Short Protection;OCP;OVP;Thermal Protection LED Open Protection;LED Short Protection;OCP;OVP;Thermal Protection LED Open Protection;LED Short Protection;OCP;OVP;Thermal Protection LED Open Protection;LED Short Protection;OCP;OVP;Thermal Protection LED Open Protection;LED Short Protection;OCP;OVP;Thermal Protection
Package Type SOP-8 SOP-8 SOP-8 SOP-8 SOP-8
关键特性
  • 内建功率 MOSFET
  • 支持高功率因数和低 THDi 要求的应用
  • 可编程 LED 恒定电流,高精度电流调整率
  • 超低静态电流消耗,关机电流消耗仅 1μA
  • 超低系统拥有成本,经济适用的浮动式 Buck 转换器方案
  • 独特、可编程的 AND 引脚,可用其实现零电压开关以获取最优的转换效率
  • 全电压范围的离线式拓扑
  • 内建过热保护
  • 内建过压保护
  • 输出端 LED 串开路保护
  • 输出端 LED 串短路保护
  • 输出端 LED 串过流保护
Technical Documents
TitleLast UpdateShareDownload
LED 照明电源方案选择指南2018/11/15
消除在LED照明应用中的光闪烁2016/04/08
Additional Documents
Title Last Update ShareDownload
AC/DC Non-Isolated BCM Floating Buck LED Driver Controller - RT8487, RT8497 2019/03/04
Non-isolated LED Lighting Driver IC Performance Test Report - RT8487, RT8497 2019/03/04
低成本LED照明电源解决方案 AC/DC非隔离高功因降压/升降压LED驱动IC RT8487/RT8497 2019/03/04
Evaluation Boards
TitleLast UpdateShareDownload
RT8497AGS Power MOSFET Integrated High Efficiency BCM LED Driver Controller for High Power Factor Applications2016/05/09
Part NumberPackage TypePackage Qty.Free SampleBuy From Authorized Distributor
RT8497AGSSOP-82500 Request Buy from Distributor
RT8497BGSSOP-82500 Request Buy from Distributor
RT8497GSSOP-82500 Not available Buy from Distributor
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