Other Parts Discussed in Thread: BQ25756, BQ25756E, PMP41062, TPSM33615
Tool/software:
Hello,
I've swapped the BQ25756E to a BQ25756 as suggested.
I'm trying to source again at 5V3A and 9V3A.
When a contact has been established, the PD sink sends a HARDRESET due to the sink not being able to power up the VBUS. See picture below.
I2C contact between TPS and BQ seems to be alright:
write to 0x6B ack data: 0x0C 0x04 0x04 write to 0x6B ack data: 0x0A 0x4C 0x00 write to 0x6B ack data: 0x02 0x00 0x00 write to 0x6B ack data: 0x06 0x20 0x00 write to 0x6B ack data: 0x08 0x48 0x03 write to 0x6B ack data: 0x19 0x21 write to 0x6B ack data: 0x17 0xC8 write to 0x6B ack data: 0x19 0x21 write to 0x6B ack data: 0x19 0x21 write to 0x6B ack data: 0x17 0xC8 write to 0x6B ack data: 0x19 0x21 write to 0x6B ack data: 0x19 0x21 write to 0x6B ack data: 0x19 0x21 write to 0x6B ack data: 0x19 0x21 write to 0x6B ack data: 0x0C 0xE0 0x03 write to 0x6B ack data: 0x19 0x21 write to 0x6B ack data: 0x19 0x21 write to 0x6B ack data: 0x0A 0x18 0x01 write to 0x6B ack data: 0x0C 0xE0 0x03 write to 0x6B ack data: 0x19 0x21 write to 0x6B ack data: 0x17 0xC8 write to 0x6B ack data: 0x19 0x21 write to 0x6B ack data: 0x19 0x21 write to 0x6B ack data: 0x19 0x60 write to 0x6B ack data: 0x19 0x60 write to 0x6B ack data: 0x17 0xCC write to 0x6B ack data: 0x0C 0x04 0x04 write to 0x6B ack data: 0x0A 0x4C 0x00
But when reading out TPS register 0x26 (PD_Status), both PP1 and PP3 faults disable the switches.
.json I use is found below:
{
"questionnaire": {
"device": "TPS25751",
"toolBuildVersion": "1.0.2",
"answers": [
null,
2,
4,
4,
0,
0,
3,
0,
1,
1,
1,
3,
0,
3,
1.536,
6.75,
0.25,
0.25,
0
],
"vendorId": "0000",
"productId": "0000",
"version": "1.0.0.2"
},
"configuration": {
"data": {
"selected_ace": [
{
"register": 6,
"data": [
0,
0,
0,
0,
0,
0,
0,
0
]
},
{
"register": 22,
"data": [
0,
0,
0,
0,
0,
0,
0,
0,
0,
0,
3
]
},
{
"register": 40,
"data": [
2,
0,
46,
1,
0,
0,
0,
0,
0,
0,
0,
0,
0,
0,
0,
0,
3
]
},
{
"register": 41,
"data": [
194,
80,
128,
0
]
},
{
"register": 50,
"data": [
2,
170,
42,
44,
145,
1,
32,
44,
209,
2,
0,
44,
177,
4,
0,
244,
65,
6,
0,
244,
65,
6,
0,
0,
0,
0,
0,
0,
0,
0,
0,
0,
0,
0,
0,
0,
0,
0,
0,
0,
0,
0,
0,
0,
0,
0,
0,
0,
0,
0,
0,
0,
0,
0,
0,
0,
0,
0,
0,
0,
0,
0,
0
]
},
{
"register": 51,
"data": [
0,
44,
145,
1,
16,
44,
209,
2,
0,
44,
177,
4,
0,
244,
65,
6,
0,
69,
65,
6,
0,
0,
0,
0,
0,
0,
0,
0,
0,
0,
0,
0,
0,
0,
0,
0,
0,
0,
0,
0,
0,
0,
0,
0,
0,
0,
0,
0,
0,
0,
0,
0,
0
]
},
{
"register": 55,
"data": [
62,
64,
31,
65,
144,
145,
1,
0,
0,
0,
0,
0,
0,
0,
0,
0,
0,
0,
0,
0,
0,
0,
0,
0
]
},
{
"register": 66,
"data": [
26,
0,
8,
0
]
},
{
"register": 92,
"data": [
13,
12,
0,
0,
0,
0,
0,
0,
0,
0,
0,
0,
0,
4,
0,
0,
0,
4,
0,
0,
0,
0,
0,
0,
0,
4,
0,
0,
0,
0,
0,
0,
0,
0,
0,
0,
0,
0,
0,
0,
0,
0,
0,
0,
0,
0,
0,
0,
0
]
},
{
"register": 112,
"data": [
3
]
},
{
"register": 119,
"data": [
0,
0,
0,
0,
0,
0,
0,
0,
0,
0,
0,
0,
0,
15,
0
]
},
{
"register": 122,
"data": [
0,
0,
0,
0
]
},
{
"register": 123,
"data": [
0,
2,
255,
255,
0,
0,
0,
0,
0,
0,
0,
0,
0,
0,
0,
0
]
},
{
"register": 125,
"data": [
0,
0,
0,
0,
0,
0,
0,
0,
0,
0,
0,
0,
0,
0,
0,
0,
0,
0,
0,
0,
0,
0,
0,
0,
0,
0,
0,
0,
0,
0,
0,
0,
0,
0,
0,
0
]
},
{
"register": 126,
"data": [
0,
0,
0,
0,
0,
0,
0,
0,
0,
0,
0,
0,
0,
0
]
},
{
"register": 152,
"data": [
0,
0,
0,
0,
0,
0,
0,
0,
0,
0,
0
]
}
]
}
}
}
However I am able to use this combination of controllers as a sink upto 100W.
That is only possible when I control the BQ with a MCU. When using the TPS as a controller for the BQ the same problem occurs.
When does a fault on the PP1 and PP3 switches occur? Due to overcurrent?
