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电路保护

多少保护才足够?

Posted by Bill Russell on 14 January 2021

When designing an electronic system, the often overlooked and underestimated subject of protection must be considered. In some cases, the designer may be working to meet a certain standard such as IEC 61000-4-2 for electrostatic discharge (ESD) immunity. Equipment which is installed in harsh operating environments, such as remote meters, robotics and telecommunications systems, will require higher levels of lightning protection. These are somewhat obvious requirements. Other protection concerns include short circuits, voltage spikes, dirty power, cable discharge events, and so on. With all these transient threats, a designer may become overwhelmed and ask: how much protection is enough to ensure a reliable system?

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Tags: Circuit Protection

Preventing Drone Failure with ESD Protection

Posted by Anindita Bhattacharya on 07 January 2021

2020 年 9 月一场壮观的灯光秀火爆全网。其中采用了 3051 架无人机 (UAV),打破了无人机同时升空数量的世界纪录。除了上演迷人的灯光秀,无人机还越来越多地出现在许多实用的应用中,如工业制造检查、农作物检查、建筑工地检查、搜救行动、房地产摄影、森林火灾管理。无人机能在各种领域为人类提供宝贵的服务。

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Tags: Circuit Protection

HDMI 2.0 的 ESD 防护

Posted by Anindita Bhattacharya on 08 October 2020

During the ongoing Coronavirus pandemic when we are mostly confined to our homes, we are spending an increased amount of time in front of screens. This includes attending online meetings, taking video calls, playing video games, watching television, and also working longer hours on our computers. A high quality audiovisual (AV) experience is a must these days and thanks to the high definition digital displays and high definition multimedia interfaces (HDMI), we are able to experience high speed, high resolution AV with higher pixel depths and greater aspect ratios.

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Tags: Circuit Protection

USB 2.0 接口的 ESD 防护

Posted by Anindita Bhattacharya on 17 August 2020

Two decades ago, communication between a host computer and other devices was a complex and difficult task. The Universal Serial Bus (USB) was developed by a group of companies in 1994 to replace the multiple slow buses with a single bus that could exchange data between the host system and the peripherals. Following its release, USB quickly became very popular due to its ease of use and fast data transfer rate. Fast forward a little over two decades, all consumer electronic devices now come with integrated USB interfaces. The USB interface has evolved a lot to support modern demands of very high speed communication with host devices and their innovative features. Since its introduction, the USB specification has progressed as USB1.1, USB 2.0, USB 3.0, USB 3.1, USB 3.2 (Gen 1, Gen 2, Gen 2x2), USB Type-C supporting Thunderbolt, HDMI and DisplayPort via special modes, and finally, towards USB 4.

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Tags: Circuit Protection

USB Type-C 接口的 ESD 防护

Posted by Anindita Bhattacharya on 30 June 2020

Imagine this common scenario: not having a spare Universal Serial Bus (USB) port on your computer. All your personal devices are connected. On most days, I carry a mobile phone, smart watch, wireless headset, and a Wi-Fi adapter – all of which can only be charged via a USB port. When I need to back up files on my computer, I often use a USB flash drive. When charging devices in the car, I use standard USB ports. USB is everywhere! It is so ingrained into our daily lives that it is a part of our every digital experience.

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Tags: Circuit Protection

Three Reasons Why Using System Level ESD Protection Is Not Like Buying Insurance

Posted by Timothy Puls on 09 June 2020

Often I hear an analogy made about transient voltage suppressor (TVS) protection components that goes something along the lines of this: “TVS components are a great insurance policy,” or, “think of using electrostatic discharge (ESD) protection diodes as an insurance against ESD damage,” or, “you may not need it, but if you want a little additional insurance, consider adding a TVS array on this circuit.” The idea is that when design engineers invest in using TVS components for circuit protection it is like a “hedge” or added “insurance” against some unforeseen ESD or transient damage that might occur in the future.

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Tags: Circuit Protection

Semtech and Society of Women Engineers: Community, Diversity and Inclusion

Posted by Isabel Stumfall on 06 May 2020

Just a few short weeks ago, I had the privilege of speaking at the Society of Women Engineers (SWE) collegiate section at California Polytechnic State University, San Luis Obispo (Cal Poly SLO). Having been an active SWE member for five years and the 2019-2020 Section President for the San Buenaventura professional section, I was beyond thrilled to have the opportunity to represent Semtech at an event for SWE. This was able to take place thanks to a company culture of community building and enthusiastic support from Semtech leadership. Semtech’s CEO has spoken previously, such as in a recent interview with Authority Magazine, on the importance of diversity, setting the tone for Semtech’s commitment to a diverse workforce. Diversity meets inclusion when each member of the team takes the Semtech Core Value of treating all with dignity and respect, and applies that to supporting a global team and a commitment to recruiting with diversity in mind.

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Tags: Company, Circuit Protection, Human Resources, ESG

第二部分:OBD-II 系统的 ESD 保护

Posted by Anindita Bhattacharya on 29 April 2020

This is the second blog in a two-part series about ESD protection of OBD-II ports. Read the first part here.

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Tags: Circuit Protection

第一部分:OBD-II 系统和协议

Posted by Anindita Bhattacharya on 23 April 2020

假设您在网上买了东西,一直盼着包裹早日送达。您每天望眼欲穿,可快递员迟迟不来。使用手机或计算机上的跟踪系统,就可以确切知道包裹何时送达。或假设您的孩子放学后被接到托管班,您想知道孩子是否已安全到达目的地。如果能在手机上跟踪孩子所坐的车辆,那就太方便了。

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Tags: Circuit Protection, ESG

TVS 峰值脉冲功率:是不是越高越好?

Posted by Bill Russell on 15 April 2020

One of the most misunderstood ratings for transient voltage suppressor (TVS) diodes is peak pulse power (PPP). Many engineers will select surge protection components based primarily on rated peak pulse power and assume that their system will be well protected. After all, it seems logical to assume that a higher power rating means the device can absorb higher transient currents and therefore should be superior. While peak pulse power ratings may be considered in the selection process, the device should not be chosen solely on this parameter. To illustrate why, let us review the definition of TVS peak pulse power.

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Tags: Circuit Protection

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