I am using 3 halogen lights with 5V/0.5A each controlled by a constant current source (or basically "LED driver") because of light accuracy. Right now I am using the PT4115 (step down led driver) for each light bulb, but this one is also getting really hot. Input voltage is 12V. For another revision, I was planing to run all light bulbs (those 7.5W total) with only one IC because of limited PCB space. I was looking around the whole last day but couldn't really find what I was looking for. There are many step up led drivers, but those are really made to drive led's at true colour with PWM dimming instead of analog diming.
For example, the Analog Devices led driver can be run on PWM (or frequency set) mode with additional analog diming, but not on analog diming alone, example: https://www.analog.com/media/en/technical-documentation/data-sheets/80421fb.pdf The RT-pin doesnt go down to 0 Hz, but can be only minimised to 250 kHz, which is not suitable, since I need constant lighting without PWM flimmering.
Does some IC series I am looking for even exist or is there any possible solution for turning an PWM input into a constant analog control input with an additional circuit, so that the light is always on without any switching?