Hi Sir
Due to we meet a 13A inrush current
May I know TPS25926 can support bigger current limit (modify RILIM value bigger than 150kohm)?
or disable current limit function ?
Thanks
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HI Rakesh
When I use "Ultrastar SN200" this SSD on CN1 will meet inrush issue (schematic as below)
When C121 pop ,the inrush current will be 13.08A and +12V1 will be drop to 9.484V
When C121 non-pop ,the inrush current will be 2.4A and +12V1 will be drop to 7.192V
May I know
1. Do you have any idea why this inrush current is so big?
2. Due to we don't want to cause TPS25296 to current protection ,what's value of C121 is suitable?
HI Rakesh
CH Yellow: Close to PSU +12V Net Voltage (power supply for Backplane)
CH Green: NC U52 measuring + 12V to + 12_1 current
CH Blue: C67 that +12V Net Voltage (Before the eFuse)
CH Pink: C121 that +12V1 Net Voltage (behind the eFuse)
When We follow SN200 SPEC and change C121 from 22uF to 4.7uF
Inrush current still have 11.2A
Inrush current happened on re-plug condition