Infineon XDPP1100, Technical Reference Manual

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User Manual 240 of 562 V 1.0
2021-08-25
XDPP1100 technical reference manual
Digital power controller
Fault handler
o
Deasserted when temp. is less than ( fault_ut_fault_thresh - fault_temp_fault_hyst )
Register fault_temp_fault_hyst should be set to a negative value for PTC sensors and a positive value for NTC
sensors. The above-mentioned registers are computed by FW as follows:
•
fault_ot_fault_thresh based on OT_FAULT_LIMIT and the FW-implemented temperature LUT
•
fault_ot_warn_thresh based on OT_WARN_LIMIT and the FW-implemented temperature LUT
•
fault_ut_fault_thresh based on UT_FAULT_LIMIT and the FW-implemented temperature LUT
•
fault_ut_warn_thresh based on UT_WARN_LIMIT and the FW-implemented temperature LUT.
The temperature faults and warnings are reported on the following PMBus commands:
•
STATUS_BYTE
•
STATUS_WORD
•
STATUS_TEMP
It should be noted that the OT_FAULT and UT_FAULT remain asserted in the PMBus STATUS commands until
OT_WARNING and UT_WARNING are deasserted. The XDPP1100 response to temperature faults is programmed
through the PMBus commands:
•
OT_FAULT_RESPONSE
•
UT_FAULT_RESPONSE
The time unit for the delay portion of the input voltage RESPONSE commands is defined by PMBus command
FW_CONFIG_FAULTS bits [1:0]. All PMBus commands and their programming are described in
section 9.8 .
9.1.7 Current sharing fault
The XDPP1100 asserts a current sharing fault under the conditions described in section 10.1 . The current
sharing fault is reported on PMBus command STATUS_IOUT bit [3].
9.1.8 V
OUT_MAX
, V
OUT_MIN
warning
The XDPP1100 supports the VOUT_MAX and VOUT_MIN warnings as described in section 5.5 . The
VOUT_MAX_MIN warning is reported on PMBus command STATUS_VOUT bit [3].
9.1.9 Sync fault
The XDPP1100 asserts the sync fault when the external SYNC input is out of range as described in section 7.1.2 .
The sync fault is reported on PMBus command STATUS_MFR_SPECIFIC bit [7].
9.1.10 T
ON_MAX
, T
OFF_MAX
faults
The XDPP1100 supports the TON_MAX fault and TOFF_MAX warning through FW. For these, the following
PMBus commands are used to set limits:
•
TON_MAX_FAULT_LIMIT sets an upper limit on how long the XDPP1100 attempts to power up the output
without reaching the output undervoltage limit. If this limit is exceeded the response defined by PMBus
command TON_MAX_FAULT_RESPONSE is taken.
•
TOFF_MAX_WARN_LIMIT sets an upper limit on how long the XDPP1100 attempts to power down the output
without reaching 12.5 percent of the programmed output voltage at the time the XDPP1100 is turned off.
Since this is only a warning, no response is required.
The TON_MAX fault and TOFF_MAX warning are reported on STATUS_VOUT bits [2] and [1] respectively.