I only looked at two curves most similar to the intended application and saw what i expected. No more than 10x steady state current with an exponential transient that decays to 95% (3 TC) within 10 ms.
Both of those increase dissipation in the transistor.
At some added complexity you could preheat the next lamp, but this would be counterproductive on the conversion to LED.
They can be commutated, but it is complex, parts intensive, and strange. I have worked with systems that did it, but never designed such myself.
Hello Joseph,
Maybe you can exchange the details with Pimpom. With this numbers, he can use the mosfet without any heat sink and other additional circuits (as I used 100ms for decay to 60% of peak value). With 10ms to 5%, he we be far within the SOA boundary.
Best regards,
Wim PA3DJS
-- No. Wanna try again? Or maybe post it here, but disguised? JF
Of course they do, but they limit the surge. ...Jim Thompson
--
| James E.Thompson, CTO | mens |
| Analog Innovations, Inc. | et |
| Analog/Mixed-Signal ASIC\'s and Discrete Systems | manus |
| Phoenix, Arizona 85048 Skype: Contacts Only | |
| Voice:(480)460-2350 Fax: Available upon request | Brass Rat |
| E-mail Icon at http://www.analog-innovations.com | 1962 |
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In beer there is freedom,
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OK. Here's an address I haven't used in years. I was surprised to see that it hasn't expired. pimpom(at)37delete-all-letters-and-leave-just-the-figures(dot)com - now let a bot harvest /that/ address. :-)
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