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[原创]TI TPS7H4002-SP辐射硬度放心(RHA)3A同步降压转换解决方案

关键词:电源管理 DC/DC转换器 辐射硬度放心(RHA) TI TPS7H4002-SP

时间:2021-08-19 13:39:19       来源:中电网

TI公司的TPS7H4002-SP是抗辐射加固的5.5V 3A同步降压转换器,通过高效和集成了高边和低边MOSFET具有最佳的小型化设计.通过电流模式控制,降低了元件数量进一步节省了空间,而高开关频率又降低了电感的占位面积.抗辐射加固高达TID 100 krad(Si),SEL, SEB和SEGR 免疫到LET = 75 MeV-cm2/mg,SET 和SEFI 特征化高达LET = 75 MeV-cm2/mg,峰值效率为96.9% (VO = 2.5 V),集成了50-mΩ和35-mΩ MOSFET,最大输出电流3A.器件具有灵活的开关频率选择:100-kHz到1-MHz可调内部振荡器,外接同步能力为100 kHz 到1 MHz,0.807-V ±1.5%电压基准,能对温度,辐射,线路和负载进行调整.主要用在空间点负载电源如FPGA,MCU,数据转换器和ASIC,通信有效载荷和光学图像有效载荷.本文介绍了TPS7H4002-SP主要特性,详细功能框图, 典型应用电路图,评估模块TPS7H4002EVM-CVAL主要特性和默认配置表,电路图,材料清单和PCB设计图.

 

The TPS7H4002-SP is a radiation hardened, 5.5-V, 3-A synchronous step-down converter, which isoptimized for small designs through high efficiencyand by integrating the high-side and low-sideMOSFETs. Further space savings are achievedthrough current mode control, which reducescomponent count, and a high switching frequency,

which reduces the inductor footprint.

The output voltage startup ramp is controlled by theSS/TR pin which allows operation as either a standalone power supply or in tracking situations. Powersequencing is also possible by correctly configuringthe enable and the open drain power good pins. Inaddition, the TPS7H4002-SP can be configured inpri..

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