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AFE4490: the maximum switching speed for LED driver in AFE4490

Oliver Ou
Intellectual 2845 points
Part Number: AFE4490

Hi 

How about the maximum switching speed for LED driver in AFE4490? Can it support 10Khz switching speed?

If only one LED is needed, can it work with below configuration to double switch speed?

Thanks.


  • 0
    TI__Genius 12575 points
    Hi Oliver,

    The frequency of the LED in AFE4490 is governed by PRF (i.e. once in every PRP cycle).
    For the scheme as shown above, the LED will be switched twice in a PRP cycle and if you set the PRF = 5KHz the switching frequency of the LED will be 10KHz.

    Regards,
    Prabin