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先进的同步整流控制器为基于LLC的电源设计 提供同类最佳的简化设计、可靠性和高能效   Japanese Korean

双MOSFET驱动器控制器使用最少用于LLC拓扑结构的外部元件

PCIM 2017 – 9号厅 342号展位- 德国纽伦堡–2017年5月16日 – 推动高能效创新的安森美半导体(ON Semiconductor,美国纳斯达克上市代号:ON),推出了先进的同步整流(SR)控制器 优化用于LLC谐振转换器拓扑结构。FAN6248需用的额外元件最少,提供高能效,简化热管理,提升整体系统可靠性,和简化LLC电源的设计。

FAN6248是用于现代高性能电源单元(PSU)的一个理想方案,这些应用要求在一个小的空间提供高可靠性和能效。典型应用包括服务器台式电脑、游戏机、大屏LCD TV和OLED TV、网络、电信LED照明

该器件采用先进混合的SR控制法,结合瞬时漏电压检测与以前的开关周期信息。单独的100 V额定值检测输入准确地检测到两个SR MOSFET两端的漏源电压,支持次级绕组中的任何不对称或不良耦合。FAN6248采用这种先进的控制法,防止电流反向和避免由于电容电流尖峰误触发SR,提供高度可靠的工作。在控制器内的反击穿控制增强PSU的可靠性和防止同时导通两个SR MOSFET的潜在破坏性。

FAN6248和仅两个外部电阻及MOSFET成就一个支持达800 W的简单LLC转换器。尤其在嘈杂的环境中,添加两个电容器进一步增强系统的稳定性。FAN6248在宽范围的功率等级可靠、高效地运行,实现上述谐振工作而不产生电压尖峰。在空载时,FAN6248进入绿色模式和关闭。在轻载条件下,在绿色模式的控制器脉冲提供高能效标准如80 PLUS®、DoE VI和 CoC Tier 2所要求的极高能效供电。

内置自适应寄生电感补偿还最大限度地减少由于封装的杂散电感在SR MOSFET的体二极管导通,从而提高PSU能效。该系列有四款器件;电源设计人员能基于开关频率(25 kHz至70 khz或60 kHz至700 khz)和与MOSFET有关的杂散电感水平选择最适合他们应用的型号。范围适用于采用TO-220、D2PAK、DPAK或PQFN封装形式的MOSFET。此外,FAN6248的10.5 V高栅极驱动输出确保能驱动这些极宽广范围的MOSFET。

安森美半导体电源转换方案总经理Shane Chilton说:“FAN6248全面解决现代LLC电源设计人员的需求。创新之处如混合控制法和自适应寄生电感补偿确保可靠和高效的运行。仅需两个电阻器和MOSFET便能实现最先进的LLC转换器,该控制器将广受需要高性能的应用设计工程师的欢迎。”

安森美半导体提供设计支援,包括采用完整的LLC设计的一个240 W评估板,还提供子板以结合FAN6248到现有设计。请联系您的安森美半导体销售代表以申请评估板。

封装和定价

FAN6248采用SOIC-8封装,每10,000片批量的单价为0.487美元。欲了解更详尽的产品信息,请访问网站

请莅临德国纽伦堡举行的PCIM Europe安森美半导体展位(9号厅342号展台)。请观看FAN6248评估板演示视频和访问网站以获取更详尽的信息。



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