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Register a new account. We need to create a additional leakage path greater that the worst leakage spec in order to balance the voltages. adtasheet

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Posted June 6, If we take 3mA to be very safe, the voltages balance out but we have to live with the high leakage current through the load, which may be a problem for the application. Posted 2b4444 4, Already have an account?

I have a project coming up where I need to hold off about volts using an SCR. By stanyJune 3, in Power Electronics.

2N4444 Datasheet

Sign up for a new account in our community. Hey guys, I’m a new member to this forum, so I have no idea if this topic has arisen before.


Also note that we will be generating a fair amount of heat in the balancing resistors as shown on the wattmeter. The problem is the leakage current that may vary from 10uA at a cold junction temperature to 2mA for a hot junction.

This will cause voltage breakdown of D1, followed by breakdown of D2. Look at this AP-note http: Create an account or sign in to comment You need to be a member in order to leave a comment Create an account Sign up for a new account in our community.

Posted June 3, Off my head, I cant just ramble out the way it works, but I’ll look through the schematics and the theory book tommorow at work and try to get you a more definitive answer.

From what I have seen they use pulse transformers to trig from a lower voltage to achieve simultaneous response.

Let’s look at a typical hookup using two 2N’s in series. We connect it as shown in the first diagram, but find vatasheet the load turns on when we connect the power, even with no trigger applied.


We can see that D1 with the lowest leakage will have more than its rated Datashert over it. PDF This gives you the basic idea, but there are other problem issues not mentioned here. Share this post Link to post Share on other sites. Sign In Sign Up.

Anyone out there with any experience in this application??? Years ago, I 2n4444 or heard of someone putting two SCR’s in series to achieve higher voltage rating.

2N – Digiware Store

A single device with this type of holdoff is really expensive, so I’m looking for an alternative solution. Power Electronics Search In. We want to use it in a V application. You need to datasheeh a member in order to leave a comment. In the diagram I used a leakage for 10uA for the one and about 20uA for the other.

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