UCC27614: Abnormal work in gate driver.

Hi Sanghyun,

Thanks for reaching out to TI.

Overall, the schematic looks mostly okay, but I do have some follow-up questions:

1. Can you comment on the L11 inductor on the VDD pin connected to pin 6 and 7?
2. Can you confirm the timing on Clock_A and Clock_B and if they are synced?
3. Can you send an updated waveforms diagram that contains the following:
   1. IN+
   2. IN-
   3. VDD
   4. OUTPUT

Thank you!

Jeremiah

Dear Jememiah.

Thanks for your fast response.

1)  L11 : MH2029-800Y

www.mouser.kr/.../mh-777565.pdf

 2) CLK_A, CLK_B is Pushpull type RF-AMP.

3) CLK_A, CLK_B, EN_CLK_A  signal is controlled by MCU.

  -First.  VDD(+12V) is always on when system turn on.

  - Second. CLK_B is on when user start.

  - Last. EN_CLK_B is HIGH.

Please see below waveform. 

※ C2(Magenta) : CLK

    C4(Green) : Enable.

Hi Sanghyun,

Thanks for your patience over the weekend.

Taking a second look, there may be a chance the output waveforms are affected by the EN-CLK-A going low, shutting of the output. However, I'd like some more clarification on some points (my apologies for not specific enough requests!):

1. What the use case is for the L11 inductor on the VDD pin?
2. Are the Clock_A and EN_CLK_A synced?
3. Can you send an updated waveforms diagram that contains all the following in one diagram, with a 2us/div (the previous response only has CLK and Enable on a 1ms/div)  :
   1. IN+
   2. IN-
   3. VDD
   4. OUTPUT

Thanks!

Jeremiah