Other Parts Discussed in Thread: TPS22969,
Dear Support
The customer does not follow the EVM design, They change load switch TPS22969DNY (Q5&Q6) to other vendor item.
The design is can't normal work, When SLP_SUS# is pulled high, the chip will power down even V3.3A_DSW_PG&V1.8A.
I find the issue is load switch is too slow. (they have a capacitance to control the rise time.)
I try to remove the cap, and the chip can be normal power up to the final action. but register has an error(VCCIO_FAULT&V33A_PCH_FAULT)
Question below
1.DPWROK to SLP_SUS# takes 95ms from PCH, What is the range? The TPS22969 is a must?
2. How to debug the 0x16 error? What are the Triggering conditions? How to fix it?
VCCIOFAULT
These bits indicate that the VR has lost regulation
0: Clears register
1: Indicates power fault
V33A_PCH_FAULT
These bits indicate that the VR has lost regulation
0: Clears register
1: Indicates power fault
34 00 22 34 01 10 34 02 01 34 04 70 34 05 00 34 08 10 34 09 00 34 0B 14 34 0C 78 34 11 30 34 12 02 34 13 A5 34 14 1F 34 15 40 34 16 90 34 17 00 34 18 00 34 19 00 34 30 0A 34 31 2A 34 32 2A 34 33 0A 34 34 2A 34 35 0A 34 36 3A 34 37 1A 34 38 2A 34 3B 3F 34 3C 00 34 3D 00 34 3E 00 34 3F 00 34 40 5F 34 41 00 34 42 00 34 43 00 34 48 1C 34 49 00 34 51 05 34 69 0F 34 6A F8 34 6F 60 34 D0 00 34 DD 00 34 DE 00 34 DF 88 34 E0 00 34 E1 00 34 E2 00 34 E3 00 34 E4 00 34 E5 01 34 E6 00 34 E7 00 34 E8 00 34 E9 02 34 EA FA 34 EB 00 34 EC 00 34 ED 42 34 EE 00 34 EF 00 34 F0 00
