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Require Design Tool of NCP1252E for SMPS, also require Reference design for 350W smps design (here, no result found on Web Designer+ power supply on website)

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1. Can we use NCP1252 for safety application? 2. What is the FIT rate of the NCP1252?

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在用NCP1252A做双管正激电路，功率400W，复位二极管用的是STTH110，在产品使用过程中出现了复位二极管损坏的情况，麻烦帮忙给分析一下。下臂的复位二极管的正极连接在取样电阻的上边可以吗？有什么隐患吗？会影响NCP1252A的逻辑吗？为什么？请参考如下图纸：

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Hi Team, We're working on a DC/DC converter whose requirement is - Input: 390VDC (generated through a PFC section) Output: 1 ~ 5.5V/ 45A For this We've used NCP1252ADR2G based solution.

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Hello, Can anyone please help sharing the daughter board design manual used in the Evaluation board/ Application note AND8373/D for NCP1252 Current Mode PWM Controller for Forward converter. Thanks, Saurabh

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I am trying to make 2 Switch Forward Converter with IC of NCP1252. when I connect with AC mains feedback loop is not working and also PWM pulse is not increasing when the load is connected always goes into skip cycle mode I don't know why.