| ??? 04/10/06 12:37 Read: times | #113963 - expensive is relative Responding to: ???'s previous message | 
| But couldnt get an exact match for what i look. 
 one i found was what Traco is offering (9-18V i/p ; 24 Vo/p) but it seems to be expensive for me. expensive is relative, the time you will need to make one yourself is HUGE, at least if EMI and/or efficiency matters. You can find a ready made such device for less than $20 I'm sure. Have you tried Power Trends (TI) Erik | 
| Topic | Author | Date | 
| step up voltage regulator | 01/01/70 00:00 | |
| 12V rectified output? | 01/01/70 00:00 | |
| additional Transformer occupies space | 01/01/70 00:00 | |
| 18V Center Tap Transformer? | 01/01/70 00:00 | |
| size ? | 01/01/70 00:00 | |
| Mistake in analysis | 01/01/70 00:00 | |
| why two? | 01/01/70 00:00 | |
| Of course! | 01/01/70 00:00 | |
| easier | 01/01/70 00:00 | |
| You are righ Kai. I didnt analyse this w | 01/01/70 00:00 | |
| nope, that is why it is called a switche | 01/01/70 00:00 | |
| Step-up, step-down | 01/01/70 00:00 | |
| ON/OFF(active low) pin? | 01/01/70 00:00 | |
| Shutdown pin | 01/01/70 00:00 | |
| Thanks.   | 01/01/70 00:00 | |
| Try this simple circuit. It might work | 01/01/70 00:00 | |
| LM2577 | 01/01/70 00:00 | |
| expensive is relative | 01/01/70 00:00 | |
| Charge pump | 01/01/70 00:00 | |
| Thank you all | 01/01/70 00:00 | |
| Two are needed! | 01/01/70 00:00 | 



