| ??? 12/31/08 07:23 Read: times |
#161233 - The temperature may rise Responding to: ???'s previous message |
Richard Erlacher said:
Are you exceeding the environmental spec's for this device? What puzzles me is that you think it's required in this case... Why? RE The temperature inside a closed automotive may rise above 85C . I was thinking to implement an onboard temperature sensor to compensates this by switching the IC. Though the IC has builtin over temperature sensing and compensation but if it works in this temperature band continuously its going to suffer even more. Per Westermark said:
Regular temperature cycling can result in metal fatigue in the bond wires so you should really think twice about cycling the power like that. Another failure source is the glue that holds the silicon chip. Thats a legitimate point ,does that apply in case we do not let it cool off entirely . -Ap |
| Topic | Author | Date |
| Thermal stress reduction for IC | 01/01/70 00:00 | |
| Ask the manufacturer! | 01/01/70 00:00 | |
| Wear from temperature cycling | 01/01/70 00:00 | |
| loose vs lose | 01/01/70 00:00 | |
| What's the rated MTBF? | 01/01/70 00:00 | |
| The temperature may rise | 01/01/70 00:00 | |
| automotive grade is 125C | 01/01/70 00:00 | |
| You should have mentioned 150C | 01/01/70 00:00 | |
| Why does it rise? | 01/01/70 00:00 | |
| Though its able | 01/01/70 00:00 | |
| Sounds unlikely to me | 01/01/70 00:00 | |
| You need to consume power to be able to save power | 01/01/70 00:00 | |
| Why not having some numbers? | 01/01/70 00:00 | |
| Power dissipation | 01/01/70 00:00 | |
| Not 1.4W at 85C but 1.2-0.24 = 0.96W | 01/01/70 00:00 | |
| figure 1.4W | 01/01/70 00:00 | |
| Reversed logic | 01/01/70 00:00 | |
| Agreed | 01/01/70 00:00 | |
| Answers | 01/01/70 00:00 | |
| The webpage accepts | 01/01/70 00:00 | |
| Useful links... | 01/01/70 00:00 | |
| Tjmax | 01/01/70 00:00 | |
| Please read the datasheet again, carefully! | 01/01/70 00:00 | |
Not Obsession only info | 01/01/70 00:00 |