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Flashlight driver circuit board6/1/2023 ![]() Constrained to a particular current, the LED will settle in at its Vf for that current and the rest of the voltage from the battery will be converted to heat by the regulator chips. Eight 350mA chips (using two boards or both sides of one 17mm board) gives 2800mA which is ideal for XM-L2 and XP-L LEDs. Each chip allows 350mA of current through and when wired in parallel, the current adds, so 700mA from 2 chips, 1050mA from 3 chips, and 1400mA from 4 (some drivers have higher binned regulator chips that allow 380mA through). ![]() However these drivers have a number of AMC7135 current regulating chips installed. Though people call this type of driver a linear regulator, linear regulators regulate the voltage.
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