ESD

QWE4562009

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If the IO port of the microcontroller can withstand 6KV static electricity, how to select the TVS tube? Which parameter should be considered? Don't do a lot of calculations. According to experience, from the application perspective. In addition to adding TVS tubes to the ports, what other good methods are there? Fewer components! Limited space!

qwqwqw2088

Can it withstand 6KV static electricity?

Is this contact discharge voltage or air discharge voltage?

This is just the ESD level can be divided into 4 levels: 2kv 4KV, 6KV, 8KV

To choose a good TVS, the original poster here is for anti-static, so he should look for ESD diodes.

Then, according to the maximum voltage shock that the circuit system can withstand, select the appropriate clamping voltage.

qwqwqw2088

The OP doesn't seem to want to make sense...

Just to popularize it briefly,

Why choose the clamping voltage?

That is to say, TVS can clamp the high voltage of 6KV or 8kV to the clamping voltage value within a few nanoseconds, thereby effectively ensuring the safety of the protected IC. It is very simple. There is no such thing as "don't do a lot of calculations"

qwqwqw2088

The original poster wants to install ESD TVS on the IO port of the microcontroller, and requires the respondent to provide a small package.

It is recommended to use a small package: DFN1006, which is smaller and thinner than the SOT-23 package.

Find the model number: ESDA05CP30

annysky2012

qwqwqw2088 posted on 2021-9-14 08:20 The OP doesn't seem to want to make sense. Let's simply popularize it. Why do we need to choose the clamping voltage? It means that the TVS can be clamped within a few nanometers...

Indeed, experience is gained through many calculations, and it is still necessary to calculate.

langtuodianzi

TVS器件本身具有一定的ESD的耐受能力，最关键的特性是箝制电压(Clamping Voltage)，此项特性决定了被保护的主芯片，在受到ESD的轰击时会遭遇多少的跨压在自身上，越高的箝制电压就表示主芯片受到损害的风险越高，足够低的箝位电压才能实现可靠保护。

QWE4562009

qwqwqw2088 posted on 2021-9-14 08:27 The OP wants to use ESD TVS at the IO port of the microcontroller, and requires the respondent to provide a small package. It is recommended to use a small package: DFN1006, which is smaller than SOT-23 ...

What are the main parameters to look at? How to select the model according to the circuit? These parameters

QWE4562009

langtuodianzi 发表于 2021-9-14 10:07 TVS器件本身具有一定的ESD的耐受能力，最关键的特性是箝制电压(Clamping Voltage)，此项特性决定了被保护的 ...

Are you a repair specialist? Do you provide components?

qwqwqw2088

QWE4562009 posted on 2021-9-15 14:20 What are the main parameters to look at? How to select according to the circuit? These parameters

Operating voltage and clamping voltage

The system is 5V, and the ESD working voltage (VRWM) is greater than 5V

There is also low capacitance, fast response