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  • LM5009: pin 8 shorting to pin 4

    Part Number: LM5009 Hi team, our customer is using LM5009 since a while already in one of their product and recently encountering some issues. Could you please have a quick look into below? --------------------------------------------------------------…
    • Answered

  • LM5009: LM5009 rebootstrap issue

    Resolved
    Part Number: LM5009 Other Parts Discussed in Thread: LM5019 , LM5164 , LM5163 Dear TI expert, Application Description 1) 75VDC Vin --> LM5009 buck (output 14V) --> LDO TPS70933 (output 3.3V) 2) LM5009's load are feedback resisto r ( 47K+10K ) and…
    • Resolved

  • LM5009: Min. output voltage for LM5009 reboot

    Part Number: LM5009 Dear TI expert, Application ： 75Vin --> LM5009 buck 14V --> LDO TPS70933 3.3V In order to save power consumption, the min. load of LM5009 only has LM5009 FB resistors (47K+10K) and LDO load (3~4mA). For this application, it…
    • Answered

  • LM5009: LM5009 current limit status

    Resolved
    Part Number: LM5009 Dear TI expert, We have an existing application for LM5009. Input voltage is about 75V(yellow curve) and output voltage is about 14V(blue curve). RCL is about 300K，RON is about 475K and 1mH inductor In our application, most of time…
    • Resolved

  • LM5009: Behavior when RCL pin is open

    TI Thinks Resolved
    Part Number: LM5009 Hello, My customer has a question for LM5009. They are investigating a failure case and would like to know what would happen if RCL pin is open. From their test, VOUT dropped to 18V from 70V (VIN is 83V). Do you know what would happen…

  • LM5009: Boot RC to slow down the switching edge

    TI Thinks Resolved
    Part Number: LM5009 Hi TI experts, We are debugging an issue and found LM5009 switching noise is the cause of the issue. We tried to add 10ohm resistor in series with BST cap, and then that issue got improved/fixed. so can we use 10ohm+0.022uF Boot RC…

  • LM5009A: C3 Value between LM5009

    TI Thinks Resolved
    Part Number: LM5009A Other Parts Discussed in Thread: LM5009 , Hello team, If Vin value is not changed, can we use same C3 value(=0.1uF) as same as LM5009? Now, my customer uses 0.1uF capacitor for C3. [Datasheet recommendation] LM5009: No smaller than…

  • LM5009: Issue in Output voltage in some of boards

    Part Number: LM5009 Hi Team We are using LM5009 in one of our design some of we are not getting output voltage . If we compare faulty boards and working boards only difference i can see if faulty boards has switchig frequency of 30 Khz while working …

  • LM5009: how to signal "red" before any commands?

    TI Thinks Resolved
    Part Number: LM5009 Other Parts Discussed in Thread: LP5009 Hi! Please support here: The requirements: • I2C bus, no other signals available. No activated ENABLE e.g. • 3V3, I2C bus is also at 3V3 level • 5V are available for the LEDs • LED…
    • Answered

  • LM5009: LM5009

    Resolved
    Part Number: LM5009 I was reading in a locked thread for the LM5009 that conducted emissions may be reduced by adding a series resistor to the boot cap. What would be an appropriate resistor value?
    • Resolved

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