Hi,
The problem which my customer encountered are that
- The PMIC of TPS650830 will be auto shunt down as it is in the working.
-
Read the status register of PWRSTAT1&2, the power fault seems to cause by V18U_25U power rail.
- CMD 0x16(PWRSTAT1) = 0x04, V18U_25U_FAULT= 1 (error)
- CMD 0x17(PWRSTAT2) = 0x00
- The customer said that he follow the TPS650830 power sequence as the data sheet
- a loader switch SiP32409
- input is V1.8A(V8) [FBVR2P]
- output is V1.8U to VSB
- EN is to PGB
- It can measure the output voltage of 1.8V on VSB.
- The error seem to indicate the PG is not set.
The customer want to know what are possible reasons to cause the fault.
Best Regards
Philip Jou