Popular Discussion
Welcome, 匿名
Legend
Community Member
Power Integrations Engineer Power Integrations ModeratorDoes PI has TOP223Y compatible parts which are immune to sparks?
I use a TOP223Y in a switching power supply and that has become a disaster. The TOP223Y randomly goes into protection mode when I use the power supply to drive a motor-like load which generates a great many sparks. Everytime the TOP223Y tripped into protection mode and shut itself off, I checked the temperature of the TOP223Y's body and felt no high temperature on it. So its going into protection mode can't be triggered by over-temperature; I think it should be triggered by the sparks on the load being driven by the power supply. So, could you please suggest me if PI has any TOP223Y compatible parts which are absolutely immune to sparks so that it won't trip into protection mode anymore? Thanks!
2 replies | Created on Apr 7, 2010 01:45 AM by Sparkler
Sparkler
We do not have any controller absolutely immune. I doubt anybody has it.
What I think is happening is that you are latching the controller by noise being injected into the control pin. I recommend you to use a newer controller. TOP223Y is very old family of devices and it may have less immunity to noise. Second (very very important), you need to be careful in your PCB layout design. When the spark happens, you need to manage the spark current to flow direct to the capacitors instead of flowing to the controller. You may see AN-43 for tips on PC layout. Also you may add a 51 to 100 ohms resistor in series with the emitter pin of the opto-coupler. Use a 0.1 uF ceramic capacitor very close to the CONTROL-SOURCE pins to filter noise. Hope these ideas will help you. PI-Worf
PI-Worf | 313 posts
Does PI has TOP223Y compatible parts which are immune to sparks?
Posted: Apr 8, 2010 | 00:48 AM In response to Does PI has TOP223Y compatible parts which are immune to sparks?
Posted: Apr 8, 2010 | 00:48 AM In response to Does PI has TOP223Y compatible parts which are immune to sparks?
Thanks, Worf: I had tried the 100ohm resister and 0.iuF ceramic capacitor solution you suggested but failed again in resisting sparks. I have your suggested solution drawn in the attached picture yo make sure that I had done it right, so please check my attached picture to see if it is exactly what you intended to mean? By the way, you mentioned that PI has new parts which may have stronger capability in resisting sparks. Do these new parts you mentioned have compatible specifications and pin assignments to TOP223Y? If they do, could you please advise me their model numbers? Or could you please just advise me if PI has any TOP223Y compatible parts which have no self-protection circuit mode? Thanks again. Sparkler
| 附件 | 大小 |
|---|---|
| spksol.JPG | 18.48 千字节 |
Sparkler | 2 posts 
