LTC3883 Datasheet, PDF (105/112 Pages) Linear Technology – Single Phase Step-Down DC/DC Controller with Digital Power System Management

LTC3883/LTC3883-1
PMBus Command Details
MFR_READ_IIN_CHAN
READ_VIN
READ_IIN
STATUS_VOUT
Reserved
STATUS_WORD
Reserved
Reserved
STATUS_MFR_SPECIFIC
Reserved
[15:8]
[7:0]
[15:8]
[7:0]
[15:8]
[7:0]
[15:8]
[7:0]
LIN 11
LIN 11
LIN 11
BYTE
BYTE
WORD
BYTE
BYTE
BYTE
BYTE
133
134
135
136
137
138
139
140 Always returns 0x00.
141
142
143 Always returns 0x00.
144 Always returns 0x00.
145
146 Always returns 0x00.
Table 11a: Explanation of Position_Fault Values
POSITION_FAULT VALUE
SOURCE OF FAULT LOG
0xFF
MFR_FAULT_LOG_STORE
0x00
TON_MAX_FAULT
0x01
VOUT_OV_FAULT
0x02
VOUT_UV_FAULT
0x03
IOUT_OC_FAULT
0x05
TEMP_OT_FAULT
0x06
TEMP_UT_FAULT
0x07
VIN_OV_FAULT
0x0A
MFR_TEMP_2_OT_FAULT
MFR_FAULT_LOG_CLEAR
The MFR_FAULT_LOG_CLEAR command will erase the fault log file stored values. It will also clear bit 3 in the
STATUS_MFR_SPECIFIC command. After a clear is issued, the status can take up to 8ms to clear.
This write-only command is send bytes.
Block Memory Write/Read
COMMAND NAME CMD CODE DESCRIPTION
DATA
TYPE FORMAT
MFR_EE_UNLOCK
0xBD Unlock user EEPROM for access by MFR_EE_ERASE and R/W Byte Reg
MFR_EE_DATA commands.
MFR_EE_ERASE
0xBE Initialize user EEPROM for bulk programming by MFR_EE_ R/W Byte Reg
DATA.
MFR_EE_DATA
0xBF Data transferred to and from EEPROM using sequential
R/W
Reg
PMBus word reads or writes. Supports bulk programming. Word
UNITS
DEFAULT
NVM VALUE
NA
NA
NA
All the NVM commands are disabled if the die temperature exceeds 130°C. NVM commands are re-enabled when the
die temperature drops below 125°C.
3883f
105