Badcaps Forums - View Single Post - I2C Programming

Richi_el · 11-30-2021, 04:03 AM

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

11-30-2021, 04:03 AM	#3
Richi_el Member Join Date: Nov 2013 City & State: Germany My Country: Koln I'm a: Knowledge Seeker Posts: 70	Re: I2C Programming - How to ? 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 Last edited by Richi_el; 11-30-2021 at 04:07 AM..