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LED Driver of Illumination & General Lighting

Takahiro Nishizawa
Genius 5575 points
Other Parts Discussed in Thread: LM3409, TPS92691, TPS92690, TPS92692

I am looking for LED Driver that meets the following conditions.

It is Illumination & General Lighting LED Driver.

Vin=20~32V

Vf of LED=3.0 or 6.0

LEDs=about 20

(Our customer does not decide number of series and parallel.

 But, customer allows all configurations.

 For example, 20 series / 1 parallel, 10 series / 2 parallel, 7 series / 3 parallel and so on. )

Iout=1.2 or 2.4A

Please tell us the best product.

Best Regards,

Takahiro Nishizawa

  • 0
    TI__Genius 14295 points
    Hi, Takahiro,

    Considering your reqiurements, move this thread to another forum.

    Thanks.
    Regards,
    Kenneth
  • 0
    TI__Mastermind 25500 points

    Hello Takahiro,

    Does this application have dimming requirements? If so analog, PWM, or both? If PWM is there a PWM frequency specification?

    The most simple solution would be to have 5 series/4 parallel using 3V LEDs (15V output voltage). Then you could use an LM3409 buck controller. That would be the lowest component count solution.

    Another option is to use the TPS92690, TPS92691, or TPS92692 and use 20 series/1 parallel (60V output) in boost configuration.

    Let me know if you have more information that may narrow it down. But I would start with the LM3409 from the information I have so far in this thread.

    Regards,

    Clint