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TLC5943: About GSCLK of TLC5943

Vera Mao
Expert 5065 points
Part Number: TLC5943

Hi dear supporting team,

my customer use SN47LVC1G3157 for the GSCLK switching for TLC5943, the sch is as attached below: sn47lvc1G3157 ON-State Resistance：6ohm（TYP）Switch Capacitance：17.4pF  （TYP）,could you help confirm from osc output  which marked as 1 in the sch, to 2,  will there be any impedance match issue which will affect TLC5943 GSCLK?  because there is few description on GSCLK requirement in TLC5943 sch, but GSCLK as PWM control , the actual loading is not very sensitive to PWM frequency jittering.  tks a lot!


  • 0
    TI__Genius 14295 points
    Hi, Vera,

    Please refer to datasheet Figure 9 and make sure the GSCLK signal meet the requirements of TWH0 and TWL0.

    There is no impedance match issue in the schematic.

    Please help to click "Resolve" if the problem is solved.

    Thanks.
    Regards,
    Kenneth