| ??? 04/24/07 04:36 Read: times |
#137852 - You didn't read what I said! Responding to: ???'s previous message |
The switchmode psu's I'm talking about are your standard AC/DC modules that aren't potted. You'll find these everywhere - your laptop charger, inside your ethernet hub etc etc. They normally have a UC3842 8pin ic to run the show. Normally around 10 - 40W which is your required power range. Worst case, you'll have to unwind the transformer and re-calculate the required number of turns for the input and output voltages. A hot-air gun helps to soften the varnish used to hold it all together. You've also added some critical extra information - that the input might be down to 60V. Be sure to specify the range of expected input voltages in future! A bit of Googling got me this app note from Philips: http://www.nxp.com/acrobat_d...AN1272.pdf and the onsemi one http://www.onsemi.com/pub/Collateral/UC3842B.PDF Plenty to keep you occupied. |
| Topic | Author | Date |
| Step down DC for my MCU | 01/01/70 00:00 | |
| be careful | 01/01/70 00:00 | |
| A possible method | 01/01/70 00:00 | |
| Why 100VDC? | 01/01/70 00:00 | |
| why reverse engineer? | 01/01/70 00:00 | |
| You didn't read what I said! | 01/01/70 00:00 | |
| hot-air gun helps | 01/01/70 00:00 | |
| Transformers | 01/01/70 00:00 | |
| supply correlate | 01/01/70 00:00 | |
| Use hot air gun | 01/01/70 00:00 | |
| Sounds like | 01/01/70 00:00 | |
Most likely | 01/01/70 00:00 | |
| Check commercial industrial SMPS | 01/01/70 00:00 | |
| IDEC power supplies | 01/01/70 00:00 | |
| custom range here | 01/01/70 00:00 | |
| Ask IDEC or B & B | 01/01/70 00:00 | |
| How effient does it meed to be? | 01/01/70 00:00 | |
| a very hot proposal | 01/01/70 00:00 | |
| Hot? You asked for hot? | 01/01/70 00:00 | |
| I always know my Ideas where hot. | 01/01/70 00:00 | |
| better still | 01/01/70 00:00 |