• State TI Thinks Resolved
  • Locked Locked
  • Replies 1 reply
  • Answers 1 answer
  • Subscribers 63 subscribers
  • Views 411 views
  • Users 0 members are here
Support feedback
Options
Options
Related

This thread has been locked.

If you have a related question, please click the "Ask a related question" button in the top right corner. The newly created question will be automatically linked to this question.

LMG1205: lmg1205

user5846952
Prodigy 245 points
Part Number: LMG1205

The module lmg 1205, used in a DC-DC module, malfuntions in the level of PCB. The phenomenon is that the supply voltage of both the lmg1205 and the input cannot be up to the expected values. In my design, the input voltage is 84V, but it turns out only 0.6~0.9V able to add to the circuit. What mistakes may I had made? The PCB or the circuit itself that has been stimulated in LT spice several times? It is improtant to note that during the stimulation, there are some points when the speed of stimulation gets really slowly, but eventually the output voltage obtain the ideal value.  If these ponits account for the failure?

  • 0
    TI__Genius 12990 points

    Hi User,

    thanks for reaching out on LMG1205,

    You are typically able to apply 84V to the input of the DC/DC and now only <1V? can you include the portion of the schematic that includes the driver and power loop? you can also include you simulation so I can make sure the things are properly connected.

    what voltage are you applying to LMG1205 VDD?

    is the LMG1205 or the FETs damaged?

    can you show the waveforms of LMG1205 HO/LO and the switchnode?

    thanks,