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Original question:

TPS92612-Q1: Driving a string with 6 LEDs

TPS92612-Q1: LED Driving configuration

Vikas P
Prodigy 10 points
Part Number: TPS92612-Q1


Hi, 

My question is on TPS92612-Q1. Does this LED driver support the below configuration?

Typical Vf (LED)=2.35V and maximum current that I am sourcing 44mA from Out pin of the IC. 

Can PWM pin of the IC can be connected directly to supply if PWM Dimming control feature is not used?

Appreciate a quick response.

Thanks in advance. 

Regards,

Vikas 

  • 0
    TI__Genius 10320 points

    Hi Vikas,

    I think it is. The device supports the above configuration.

    and when PWM pin of the IC can be connected directly to supply, it means PWM is always high. 

    BR,

    Hailee

  • 0 in reply to Hailee Xu
    Prodigy 10 points

    Thank you Hailee. 

    Such How many pairs of Parallel LEDs (3LEDs in series) can be added as maximum on OUT pin?

  • 0 in reply to Vikas P
    TI__Genius 10320 points

    Hi Vikas,

    TPS92612-Q1 has a high Junction-to-ambient thermal resistance(200.7℃/W), it is not suggested to use in a high output current condition. 

    if you want to improve the thermal performance, we recommend to add a parallel resistors(Rp) between IN and OUT.  you can refer the typical application in datasheet, if the output current is set to 150mA without R(p), V(supply) is 5V, P(device)=0.384W, so pls be careful to balance the thermal performance and output current setting.

    At the same time, we have a new device which has one channel output with high output current and better thermal performance, if you want to learn more, pls email me.

    BR, 

    Hailee.