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Original question:

TLC5958: 48 channel, 40ma@3.3V per channel device recommandation?

TLC5958: TLC5958 MOS Driver Inquiries

Reno Adley Prawoto
Prodigy 110 points
Part Number: TLC5958

Dear TI expert,

I would like to ask about the mosfet driver in tidu370 which is driving 64x64 pixel LED matrix. There are 32 numbers of Dual P-channel MOSFET being used where they represent 64 lines of the display. I would like to ask if this number can be halved, 16 numbers of Dual P-channel MOSFET only, where a single channel mosfet drive 2 lines of display. I saw that the rated current for the mosfet (APM4953) is 30A, I think this is sufficient because when considering full brightness : 19 mA x 16 channels x 8 ICs = 2.432A. Thank you.

Regards,

Reno

  • 0
    TI__Genius 14295 points
    Hi, Reno,

    Proper engineer has been assigned to take a look at this and will reply you soon.

    Due to Chinese new year holidays, response maybe delayed.

    Thanks for your understanding.

    Regards,
    Kenneth
  • 0
    TI__Expert 3190 points

    Hi Reno,

    In this situation with two lines connecting together, two LEDs will be paralleling connected to one channel output, if the Vf of this two LEDs are different, it will cause the difference of the current flowing to LED.

    If you do not care the brightness difference among LEDs, it should be no problem.

    Regards,

    Shawn.