dz99
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12V HB led driver
Hi All!
I would like to design a led tail/brake light for car. I've selected this kind of IC: **broken link removed**
The problem is, I need to drive each 5 leds series (assuming 1.85 nominal voltage @20mA) and with 30 or more leds it is highly impractical/costly.
What does the experts do? 12V to 70V PWM step up, and then current limiting?
35x1.9V = 66.5 V
Or do it by parallel led connecting with constant voltage? -> the spreading of each leds U-I characteristic will result in inhomogeneous lightning.
So it is a good question!
Hi All!
I would like to design a led tail/brake light for car. I've selected this kind of IC: **broken link removed**
The problem is, I need to drive each 5 leds series (assuming 1.85 nominal voltage @20mA) and with 30 or more leds it is highly impractical/costly.
What does the experts do? 12V to 70V PWM step up, and then current limiting?
35x1.9V = 66.5 V
Or do it by parallel led connecting with constant voltage? -> the spreading of each leds U-I characteristic will result in inhomogeneous lightning.
So it is a good question!