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TPS92692: Analog Dimming using IADJ-pin

Takashi Yamaguchi
Genius 13420 points
Part Number: TPS92692

Hi team,

The d/s describes that the LED current can be programmed by varying VIADJ between 140 mV to 2.25 V.  Does the range of 140mV to 2.25V include tolerance?  If not, could you let me know the min/max range?  ( For example, this range needs to be considered +/-10% tolerance, so the range will be 154mV(min) to 2.025V(max).)

Regards,

Yamaguchi

  • 0
    TI__Mastermind 18890 points

    Hi Yamaguchi,

    The IADJ input voltage absolute max is -0.3V to 5.5V.  The programing range is from 140mV to 2.25V.  The reason for this is the offset in the current sense and control circuit limits the control range on the lower end (140mV) while the internal clamp voltage (minimum 2.29V) limits the higher end of 2.25V.

    The way the spec reads is that the output current can be linearly adjusted with IADJ from 140mV to 2.25V and that's all.  So it's recommended for that range.  The output current absolute value is still dependent on the tolerance of all the specification.

    Thanks Tuan