LTC3882_15 Datasheet, PDF (27/104 Pages) Linear Technology – Dual Output PolyPhase Step-Down DC/DC Voltage Mode Controller with Digital Power System Management

LTC3882
OPERATION
Table 1. LTC3882 Fault Log Contents
RECORD TYPE
STARTING
BYTE
Header Information
0
Fault Event Record
27
Event Record N-1
47
Event Record N-2
67
Event Record N-3
87
Event Record N-4
107
Event Record N-5
127
ENDING
BYTE
26
46
66
86
106
126
146
COMMENTS
See Table 2.
Fault may have occurred anywhere during this event record. See byte 4 of Table 2 and all of
Table 3 and Table 4.
Last complete cyclical data read before the fault was detected.
Older data records…
Oldest recorded data.
Table 2. Fault Log Header Information
RECORD
Fault Log Preface
Fault Source
MFR_REAL_TIME
MFR_VOUT_PEAK (PAGE 0)
MFR_VOUT_PEAK (PAGE 1)
MFR_IOUT_PEAK (PAGE 0)
MFR_IOUT_PEAK (PAGE 1)
MFR_VIN_PEAK
READ_TEMPERATURE1 (PAGE 0)
READ_TEMPERATURE1 (PAGE 1)
READ_TEMPERATURE2
BITS
[7:0]
[7:0]
[15:8]
[7:0]
[7:0]
[7:0]
[15:8]
[23:16]
[31:24]
[39:32]
[47:40]
[15:8]
[7:0]
[15:8]
[7:0]
[15:8]
[7:0]
[15:8]
[7:0]
[15:8]
[7:0]
[15:8]
[7:0]
[15:8]
[7:0]
[15:8]
[7:0]
FORMAT
ASC
Reg
Reg
Reg
L16
L16
L11
L11
L11
L11
L11
L11
BLOCK
BYTE
COUNT DETAILS
0 Returns LTxx beginning at byte 0 if a partial or complete fault log exists. Word xx is
1 ^{a factory identifier that may vary part to part.}
2
3
4 Refer to Table 3.
5 48 bit share-clock counter value when fault occurred (200µs resolution).
6
7
8
9
10
11 Peak READ_VOUT on Channel 0 since last power-on or CLEAR_PEAKS command.
12
13 Peak READ_VOUT on Channel 1 since last power-on or CLEAR_PEAKS command.
14
15 Peak READ_IOUT on Channel 0 since last power-on or CLEAR_PEAKS command.
16
17 Peak READ_IOUT on Channel 1 since last power-on or CLEAR_PEAKS command.
18
19 Peak READ_VIN since last power-on or CLEAR_PEAKS command.
20
21 External temperature sensor 0 during last event.
22
23 External temperature sensor 1 during last event.
24
25 Internal temperature sensor during last event.
26
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3882f
27