SilabsSi88xx高速多通道數字隔离器解决方案.docxVIP

Silabs Si88xx高速多通道数字隔离器解决方案Silabs公司的Si88xx系列产品是集成了78%高效DC/DC转换器的高速多通道数字隔离器, 可提供高达2W的功率输出,极低电磁干扰（EMI）和高噪声抑制能力,主要用在工厂自动化,过程控制,可编程逻辑控制器（PLC）和太阳能逆变器和汽车电池管理.本文介绍了Si88xx主要特性,框图和应用电路,以及评估板Si88xxxISO-EVB主要特性别,电路图,材料清单和PCB设计图.The Si88xx integrates Silicon Labs’ proven digital isolator technology with an on-chip isolated dc-dc converter that provides regulated output voltages of 3.3 or 5.0 V (or 5 V with external components) at peak output power levels of up-to 2 W. These devices provide up-to four digital channels. The dc-dc converter has user-adjustable frequency for minimizing emissions, a soft-start function for safety, a shut-down option and loop compensation. The device requires only minimal passive components and a miniature transformer.The ultra-low-power digital isolation channels offer substantial data-rate, propagation delay, size and reliability advantages over legacy isolation technologies. Data rates up to 100 Mbps are supported, and all devices achieve propagation delays of only 23 ns. Ordering options include a choice of dc-dc converter features, isolation channel configurations and a fail-safe mode. All products are certified by UL, CSA, VDE, and CQC.Si88xx主要特性: High-speed isolators with integrated dc-dc converter Fully-integrated secondary sensing feedback-controlled converter with dithering for low EMI dc-dc converter efficiency of 78% Up to 2 W isolated power with integrated power switches Options include dc-dc shutdown, frequency control, and soft start Conversion3/5 V to isolated 3/5 V24 V to isolated 3/5 V supported Precise timing on digital isolators0–100 Mbps18 ns typical prop delay Highly-reliable: 100 year lifetime High electro-magnetic immunity and ultra-low emissions RoHS compliant packagesSOIC-20 wide body Isolation of up to 5000 Vrms High transient immunity of 100 kV/μs (typical) AEC-Q100 qualified Wide temp range–40 to +125 ℃Si88xx应用: Industrial automation systems Hybrid electric and electric vehicles Isolated power supplies Inverters Data acqu