TI 电容离技术详解.ppt

  1. 1、本文档共45页,可阅读全部内容。
  2. 2、有哪些信誉好的足球投注网站(book118)网站文档一经付费(服务费),不意味着购买了该文档的版权,仅供个人/单位学习、研究之用,不得用于商业用途,未经授权,严禁复制、发行、汇编、翻译或者网络传播等,侵权必究。
  3. 3、本站所有内容均由合作方或网友上传,本站不对文档的完整性、权威性及其观点立场正确性做任何保证或承诺!文档内容仅供研究参考,付费前请自行鉴别。如您付费,意味着您自己接受本站规则且自行承担风险,本站不退款、不进行额外附加服务;查看《如何避免下载的几个坑》。如果您已付费下载过本站文档,您可以点击 这里二次下载
  4. 4、如文档侵犯商业秘密、侵犯著作权、侵犯人身权等,请点击“版权申诉”(推荐),也可以打举报电话:400-050-0827(电话支持时间:9:00-18:30)。
查看更多
Above diagram shows TDDB (Time Dependent Dielectric Breakdown) test results, drawn on a semi-logarithmic scale, time to fail in years over stress-voltage in RMS-volts. A number of devices from different production lots is stressed continuously with voltages exceeding the rated voltage by far. For each test-voltage, the time to fail for the first part failing is noted. The pink dots show ADIs test results taken at 800Vrms through 1200Vrms the non-linear extrapolation results into the 50years lifetime-prediction at 565V peak or ~400Vrms. The green dots show TI’s ISO721 test-points, for quick results taken at much higher voltage. The above shows the same data-points on the same scales, just the extrapolation is linear now. This results into the 28 years lifetime for TI-capacitive couplers, that we specify. With the linear extrapolation, ADI shows significantly less. Furthermore, please note the light-blue data-point: For about 2.5 years, we have 240 parts running at 1000Vrms (Note: that 2.5 times the rated voltage!) without any failures, or in other words, about two orders of magnitude longer surviving compared to the ADuM1100. Power-up and –down behavior is an important criteria for an isolation part. Above diagrams show a ramp in the milli-second range for Vcc1, while Vcc2 is valid already, output is enabled, input is set to low. The ISO721 shows a single transition once sufficient voltage is reached. For power-down, the device assumes the opto-coupler-like failsafe-high in a single transition, once Vcc1 falls below the threshold. Magnetic couplers like the ADuM1100 show oscillation before reaching a steady-state value. Notes for powering up ADUM: In real terms, iCoupler supplies are considered off for values below 2.7 V. Given that supplies have finite rise times, a subtle point is raised: at some value of supply voltage below 2.7 V, a channel may start to operate, albeit not predictably. ADuM1xxx series of iCouplers require rise times for supplies of 0.1 V/μs. EVMs

文档评论(0)

ctuorn0371 + 关注
实名认证
内容提供者

该用户很懒,什么也没介绍

1亿VIP精品文档

相关文档