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From what I have seen they use pulse transformers to trig from a lower voltage to achieve simultaneous response. We can see that D1 with the lowest leakage will have more than its rated V over it. Anyone out there with any experience in this application??? Sign Datashfet Sign Up. A single device with this type of holdoff is really expensive, so I’m looking for an alternative solution. By stanyJune 3, in Power Electronics. I have a project coming up where I need to hold off about volts using an SCR.
This will cause voltage breakdown of D1, followed by breakdown of D2. PDF This gives you the basic idea, but there are other problem issues not mentioned here. Years ago, I read or heard of someone putting two SCR’s in series to achieve higher voltage rating.
Look at this AP-note http: You need to be a member in order to leave a comment. 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. Share this post Link to post Share on other sites. Sign in Already have an account?
Posted June 2n44444, The problem is the leakage current that may vary from 10uA at a cold junction temperature to 2mA for a hot junction. 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. Posted June 6, We connect it as shown in the first diagram, but find that the load turns on when we connect the power, even with no trigger applied. Already have an account?
In the diagram I used a leakage for 10uA for the one and about 20uA for the other. Sign up for a new account in our community.
Register a new account. Also note that we will be generating a fair amount of heat in the balancing resistors as shown on the wattmeter. Hey guys, I’m a new member to this forum, so I have no idea if this topic has arisen before.
Motorola 2N Series Datasheets. 2N, 2N, 2N, 2N Datasheet.
Power Electronics Search In. Let’s look at a datwsheet hookup using two 2N’s in series. We want to use it in a V application. Posted June 3, We need to create a additional leakage path greater that the worst leakage spec in order to balance the voltages.
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