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TPS92692: Question about Fault-pin and compensation parameters

Takashi Yamaguchi
Genius 13310 points
Part Number: TPS92692

Hi team,

Could you support following questions from my customer?

1.  My customer connects the /FLT pin to MCU like Fig.34 in the d/s. In the customer case, the MCU starts up before TPS92692, so the 3.3V pullup voltage is applied to /FLT pin before the TPS92692 startup. Is that acceptable?

2.   The following sentence is describe in the cal sheet of  "TPS92692-Q1 BOOST LED DRIVER COMPONENT CALCULATOR".  Could you let me know the meaning of fixed LED string output? Does it mean single LED string?  When customer uses single LED string, should customer use type 2 compensation?

-->Integral(type 1) network recommended for multiple LED string configuration

-->Proportional integral(type 2) network recommended for fixed LED string output

Regards,

Yamaguchi

  • 0
    TI__Mastermind 18890 points

    Hi Yamaguchi-san

    1.  Yes, it is acceptable.  /FLT is an open drain output.

    2.  Fixed LED string output means that the number and type of LED's at the output does not change.  Type 2 usually gives higher BW but type 1 is easier to compensate.  It's up to the customer to choose here.

    Thanks Tuan