I wanted to ask a quick question. When running (power) LEDs, they mostly require an adequate constant current source / LED-driver IC. Most of the time you connect multiple LEDs in series, so that the forward voltage adds up and the forward current remains the same as with only 1 LED:
I can easily calculate the forward voltage of LEDs as this one is described in nearly every datasheet given the forward current and thus calculate the output power and the power loss on the driver IC:
\$P_{loss} = \frac{P_{out}}{Efficiency_{operating.point}}-P_{out}\$
I want to exactly control the light intensity of halogen lights and therefore also use a LED driver.
I want to use 3 halogen lights @5V/0.5A, each 2,5W, total 7,5W. Input voltage is 12V (lets consider dropout voltage as theoretically 0V).
My question: Can I apply the LED configuration for halogen lights like that: Or does the light bulbs need to be all in series or parallel (like on a constant voltage source).