| ??? 05/05/10 01:15 Read: times |
#175687 - thank you everyone Responding to: ???'s previous message |
Thank you very much everyone. As I said before, I just tinker in this area, thus my mistake. I am indeed using a function generator and a scope to view the circuit in a few locations and thanks to your help, it looks like it's switching the load as intended.
However, I didn't expect to encounter that much heat from the MOSFET. I was doing some searching and I came across a LM5111. http://www.national.com/ds/LM/LM5111.pdf Anyone have any experience with this IC? Reading through the specs, I see it can sink a sufficient amount of current for my application and it looks like it can take the voltage, although the resistance looks to be higher than the MOSFET. I would love to find a TTL level controlled device with a low on-state resistance capable of switching a 12-14VDC 4 amp load at up to 300 Hz without generating a bunch of heat and having to spend 30-40 bucks on an SSR. Maybe I'm just being cheap and asking too much? :-) Thanks again, Brian |
| Topic | Author | Date |
| high current output SSR or opto | 01/01/70 00:00 | |
| Something like this perhaps? | 01/01/70 00:00 | |
| thank you | 01/01/70 00:00 | |
| Use due care... | 01/01/70 00:00 | |
| expansion | 01/01/70 00:00 | |
| Depends | 01/01/70 00:00 | |
| I agree | 01/01/70 00:00 | |
| Bleh! | 01/01/70 00:00 | |
| I caught that... | 01/01/70 00:00 | |
| half voltage | 01/01/70 00:00 | |
| why load is there | 01/01/70 00:00 | |
| Check These Items | 01/01/70 00:00 | |
| Load Placement | 01/01/70 00:00 | |
| Load placement | 01/01/70 00:00 | |
| thank you everyone | 01/01/70 00:00 | |
| 3 ohm load | 01/01/70 00:00 | |
| good advice | 01/01/70 00:00 | |
| If I understood your requiremnt properly have a look ULN2003 | 01/01/70 00:00 | |
I don't think so | 01/01/70 00:00 |