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TPS92692: the external mosfet on/off question of tps 92692

cickey xu
Intellectual 615 points
Part Number: TPS92692

Dear  export,

about tps92692,if dim/pwm pin give 100% pwm signal,how many duty rate the internal oscillator is? and if there is no FLT  signal flag,that is to say ,the FLT pin is not low and dont  triger ss pin(when ss pin connect to FLT pin) and system dont restart ,when will the external mosfet on and off?

because my customer always encounter led blink issue when led string is low light.i want to know the theory of this chip switching.

thanks 

Cickey Xu

  • 0
    TI__Mastermind 18890 points
    Hi Cickey Xu,

    First can we please have the schematic that you are using in the your design so we can understand more about what you are doing in order for us to comment. The other thing is the current you are trying to command along with the load (number of LED's) and the LED forward voltage.

    The blinking issue...Is it powering up in high current then commanded to lower current from the IADJ pin or do they power up in the lower current to begin with?

    Thanks Tuan