Bug #65
High power dissipation factor makes board overheat
| Status: | Closed | Start date: | 26/07/2010 | ||
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| Priority: | Normal | Due date: | |||
| Assignee: | - | % Done: | 50% |
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| Category: | - | ||||
| Target version: | EDA-02063-V1-0 |
Description
Power dissipation of the linear regulators (especially the LT3080 making +6V from +12V) seems to be to high. Internal overheat protection doesn't shutdown the regulator, but the thermal stress may decrease the reliability. To be discussed.
History
Updated by Maciej Fimiarz almost 2 years ago
Simple solution is to use another regulator creating the voltage in the middle between +6 and +12V, and connect it in series with the LT3080 regulator. The type of the additional regulator might be the same to keep the BOM short. The power dissipation would be shared by these two regulators, and temperature would therefore go down.
Updated by Maciej Fimiarz over 1 year ago
- % Done changed from 0 to 50
Two 47 Ohm resistors connected in parallel are added in series with LT3080 regulator. The heat creation is now more balanced. LT3080 is now moved to the other corner of the board. ADC and the clock generator are shifted to equalize the heat production over the board and to make place for the bigger coil.
Updated by Erik van der Bij over 1 year ago
- Target version set to EDA-02063-V1-0
Updated by Erik van der Bij 8 months ago
- Status changed from New to Closed
Modifications done. Checked on V3.