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Constant current boost converter
https://www.digikey.ca/product-detail/en/texas-instruments/TPS61165DBVR/296-27597-1-ND/2340765
Heat sink (candidates):
https://www.digikey.com/product-detail/en/wakefield-vette/LTN20069/345-1101-ND/1644633 - No information on heat dissipation without forced airflow. Cheap.
https://www.digikey.com/product-detail/en/ohmite/PV-T2X-38E/PV-T2X-38E-ND/9607315
https://www.digikey.com/product-detail/en/assmann-wsw-components/V5619A/AE10812-ND/3511388 - Size is more appropriate compared to other heat sinks.
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Design
Optimizing PCB thermal performance:
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- Fixed the mistakes from Rev 2
- Separate LEDs from other components to preserve space
- A zener diode is placed parallel to with each LED to prevent entire LED string from burning out
- LED board will have a heat sink
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