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mission:resources:picouvx [2016/03/18 08:18] – [BOM] chrono | mission:resources:picouvx [2016/03/18 08:37] – [BOM] chrono | ||
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Using this many LED's in a current controlled environment and a 12V power supply usually tends to result in a higher BOM count since a serial configuration will only power 3-4 LED's per chain. One alternative would be to use a parallel configuration, | Using this many LED's in a current controlled environment and a 12V power supply usually tends to result in a higher BOM count since a serial configuration will only power 3-4 LED's per chain. One alternative would be to use a parallel configuration, | ||
- | The most efficient solution seemed to be a switch-mode step-up voltage converter, transforming 12V DC up to 42V DC, which makes a serial configuration of up to 11 LED's per chain possible. This design is based on the widely available MC34063 switch-mode controller IC you can even rip off at electronic trash sites, since it's cheap and a very popular controller in chinese electronics. | + | The most efficient solution seemed to be a switch-mode step-up |
==== Specs ==== | ==== Specs ==== | ||
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**Increasing Efficiency** | **Increasing Efficiency** | ||
- | The trick to get more than 90% efficiency out of the MC34063 seems to be a very high Q inductor. | + | The trick to get more than 90% efficiency out of the MC34063 seems to be a very high Q inductor |
===== Controller ===== | ===== Controller ===== | ||