LTC4449 datasheet(94/108 Pages) LINER

94 / 108 page

LTC3882-1

Rev A

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FAULT RESPONSE AND COMMUNICATION

COMMAND NAME

CMD

CODE DESCRIPTION

TYPE

PAGED

DATA

FORMAT UNITS NVM

DEFAULT

VALUE

VIN_OV_FAULT_RESPONSE

0x56 VIN overvoltage fault response.

R/W Byte

Reg

0x80

VOUT_OV_FAULT_RESPONSE

0x41 VOUT overvoltage fault response.

R/W Byte

Reg

0xB8

VOUT_UV_FAULT_RESPONSE

0x45 VOUT undervoltage fault response.

R/W Byte

Reg

0xB8

IOUT_OC_FAULT_RESPONSE

0x47 Output overcurrent fault response.

R/W Byte

Reg

0x00

OT_FAULT_RESPONSE

0x50 External overtemperature fault response.

R/W Byte

Reg

0xB8

UT_FAULT_RESPONSE

0x54 External undertemperature fault response.

R/W Byte

Reg

0xB8

MFR_OT_FAULT_RESPONSE

0xD6 Internal overtemperature fault response.

R/W Byte

Reg

0xC0

TON_MAX_FAULT_RESPONSE

0x63 Fault response when

TON_MAX_FAULT_LIMIT is exceeded.

R/W Byte

Reg

0xB8

MFR_RETRY_DELAY

0xDB Minimum time before retry after a fault.

R/W Word

L11

350ms

0xFABC

SMBALERT_MASK

0x1B Mask ALERT Activity.

Block R/W

Reg

See CMD

Details

MFR_FAULT_PROPAGATE_

LTC3882-1

0xD2 Configure status propagation via FAULT

pins.

R/W Word

Reg

0x6993

MFR_FAULT_RESPONSE

0xD5 PWM response when FAULT

n pin is low.

R/W Byte

Reg

0xC0

MFR_FAULT_LOG

0xEE Read fault log data.

R Block

Reg

MFR_FAULT_LOG_CLEAR

0xEC Clear existing EEPROM fault log.

Send Byte

Related commands: STATUS_BYTE, STATUS_WORD, MFR_PADS_LTC3882-1, MFR_RESTART_DELAY, MFR_CHAN_CONFIG_LTC3882-1, MFR_FAULT_

LOG_STORE, CLEAR_FAULTS

Thesecommandsdetailprogrammabledeviceresponsesfordetectedfaultsbeyondthehardware-levelactionsdescribed

in the Operations section. LTC3882-1 hardware-level fault responses cannot be modified. Refer to Table 1 to Table 4

for details of fault log contents. PMBus warning event responses are listed under _WARN_LIMIT command details.

VIN_OV_FAULT_RESPONSE

The VIN_OV_FAULT_RESPONSE command instructs the device on what action to take in response to an input overvolt-

age fault. The format for this command is given in Table 13. The device also:

• Sets the INPUT Bit in the STATUS_WORD

• Sets the VIN Overvoltage Fault Bit in the STATUS_INPUT Command

• Notifies the Host by Asserting ALERT, Unless Masked

This command has one data byte.

PMBus COMMAND DETAILS (Fault Response and Communication)

LTC4449 Datasheet(PDF) 94 Page - Linear Technology

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