Is there a ready-made current source (LED driver 15W, 20W, 30W) for an unstable 12-14V car network?

Question

Power Supply

There are LED matrices (chip on board, COB), with their own rated current (power). To drive them to their nominal value (say, 20W), you need a stabilized current source (say, 1500mA). When simply stabilized 12V is supplied, the matrix consumes less than the nominal value, does not get it. If more voltage is applied, the matrix may burn out. Everything is the same as with conventional LEDs, including thermal drift.

Is there something ready-made, smarter, a driver board for unstable 12-14V inputs and with adjustment of the maximum current?

In addition to a bunch of DC-DC booster (raises the unstable voltage of the on-board network 12-14V, for example, up to 16-20V) and a limiting resistor (the value is selected for the "warmed up" matrix) ...

Answer 1

DC-DC booster in current source mode, if you do it yourself, google spare parts "step up dc-dc current driver", there are dozens of brand new microcircuits for this task, choose what is available and like it, if you need a ready-made device, then google the same in add "aliexpress" at the end, for example . LM317 is a linear boiler regulator, and there is no need to waste energy on heating the air. And this, if this business is planned in the headlights or instead of foglights, then so that at night you only go to the meeting if you don’t set up the light beam and hide it under the lens)))

Answer 2

lm317 or more powerful lm338 - folk, can be voltage or current stabilizers. There are plenty of wiring diagrams and calculators on the Internet.