PTD08D210W: UCD9248 controled by PTD08D210 problem

Part Number: PTD08D210W Hi, I found that PTD08D210 is generating a voltage of 5.9V even when the UCD9248 is not configured. PTD08D210 has two power output and this problem is seen only in one channel, I even erased the UCD Flasmemory and confirmed that no PWM is going to PTD08D210 but still i see 5.9V in one of the channel. Note: My evel board has 4 PTD08D210 which means 8 o/p voltage channels and 2 UCD9248 to control it , out of which in only one channel i have this problem. Is it the problem with the PTD08D210 , it was working fine only suddenly in one day this problem happened.

Hi Revanth, If comfortable, can you provide more information about your application? Application conditions: Input and Output voltage, output current? (the device is rated to provide an output range from 0.7 V to 3.6 V) Perhaps we can take a look at your circuit schematic? Thanks, Alejandro

Hi, Alejandro Kindly look into thje attached pdf zc702_Schematic_xtp185_rev1_0.pdfPage 43, U19 The output is rated at 1.5V and 3.3V for this particular PTD in which the 1.5V channel is having the problem

Hi Revanth, I reviewed your schematic and everything seems okay. You mentioned that it was working before and eventually something happened; Can you tell me more details about that? Did it involve updating anything on the UCD? Regards, Alejandro

Hi, Alejandro One sudden day we noticed our DDR Not working, then when we checked the voltage going to DDR section from PTD it was 2.5 V instead of 1.5 V, then when we isolated the DDR , WE found that the voltage from PTD IS 5.6 V half of the input voltage to PTD AND UCD., We earsed the UCD Flash memory to and even when no PWM IS going to PTD it generates 5.9 V. I just thinking to change the PTD and see.

Hi Revanth, Is there an update on this? If you were to swap out the PTD08D210 for a new one, does the problem still occur? How many of these failures have you seen occur in your application? Regards, Jimmy

Hi, Jimmy Just now received the components and will update the status once the rework has been done. In our application we have faced these issue two times (at rail 1.5V and at Rail 3.3V).

Hi Revanth, Please keep Alejandro and I updated on your additional testing at your earliest convenience. Regards, Jimmy

Hi Revanth, Do you have any updates for both Alejandro and I? Regards, Jimmy

Hi, Jimmy we tried replacing the IC which was available in the PTD , instead of replacing the whole PTD but it dint workout, now we have sent our board to remove the whole PTD (Since the ground thermal pads are thick it difficult to remove easily). but now due the situation due to COVID-19 , most of the companies are shutdown now and it will take some time to receive our board. I will let yu know once we receive and test it. Thanks!

Hi Revanth, Sorry I missed your reply and thank you for the update. It is unfortunate that we are in the COVID-19 predicament and I hope all is well on your end. I will keep this thread up on place it under "Waiting for Customer" status and will ping me when you reply back with more information on this. Regards, Jimmy