Hello,
thanks for your support.
Maybee i have to tell the whole story about it
i have 5 pcb`s from that device wich are not starting.
(Industrial device, same like a notebook with touch panel)
Normally the starting sequence on power supply:
beginn 0,3Amp raise up to 0,55Amp and then the devie Start by 1,4Amp
by this 5 pcbs i had some different starting sequencenes and the pcbs are not starting.
3 x starting sequences goes from 0,3Amp - 0,5Amp raise up to 0,9Amp
(the TPS658621C goes really hot) and it fall down again to 0,3 Amp
2 x starting sequences goes from 0,3Amp - 0,5Amp
so i decided to try to change the TPS658621C with new ones
The result was that all 5 pcbs are makeing now this starting sequences:
Start with 0,3 Amp raise to 0,65Amp and fall down again to 0,3Amp
All 5 pcbs make exact the same starting sequences after change the TPS658621C and also that ones wich goes hot(the TPS658621C) is not getting hot after change but not starting .
SO my result from that experiment was that the TPS658621C must be programmed and i looked to the datasheet and i saw that 11programmable mods are written in datasheet, and also that this ic is programmable with i2c interface....
I thought its like a MCU programming maybee, so i was searching for the correct programmer ect.
Maybee iam wrong, but why all devices have the same starting sequences after change TPS658621C =?
I never do this before(i2c), but i did some emmc programmings ect.
Note:
By one of that devices i had also a problem by starting process:
starting sequence was 0,3Amp - 0,5Amp and not starting...
after reflow the TPS658621C (balled) the device started normally
0,3Amp raise up to 0,55Amp and then the devie Start by 1,4Amp
Thanks for your support
