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Driver | Topology | Applications | Link |
|---|---|---|---|
TPS61165 | Boost | DRLs only | https://www.digikey.ca/product-detail/en/texas-instruments/TPS61165DBVR/296-27597-1-ND/2340765 |
LM3406 | Buck | All except DRLs | https://www.digikey.ca/product-detail/en/texas-instruments/LM3406MHX-NOPB/296-43597-1-ND/5864777 |
LM3429 | Buck-Boost | All | https://www.digikey.ca/product-detail/en/texas-instruments/LM3429Q1MHX-NOPB/296-41306-1-ND/5222770 |
PWM:
There is a PWM generator in the first versions of the design. It uses a 555 timer and a potentiometer to vary the duty cycle of the PWM signal.
I believe it is based off of this page here: https://www.electroschematics.com/pulse-generator-with-555/
We should adjust the values of the resistors and the potentiometers in order to be able to adjust the current limit of the LED driver from 50mA to 500mA.
Heat sink:
See thermal calculations here: Lights Thermal Calculations
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Optimizing PCB thermal performance:
https://www.cree.com/led-components/media/documents/XLamp_PCB_Thermal.pdf
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