LTM4677 datasheet(102/110 Pages) AD

102 / 110 page

LTC3888-1

102

Rev. 0

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OT_FAULT_RESPONSE

The OT_FAULT_RESPONSE command instructs the device on what action to take in response to an external overtem-

perature fault. The format for this command is given in Table 14. The device also:

• Sets the TEMPERATURE Bit in the STATUS_BYTE

• Sets the Overtemperature Fault Bit in the STATUS_TEMPERATURE Command

• Notifies the Host by Asserting ALERT, Unless Masked

This command has one data byte.

MFR_OT_FAULT_RESPONSE

The MFR_OT_FAULT_RESPONSE command instructs the device on what action to take in response to an internal

overtemperature fault (150°C to 160°C). The device also:

• Sets the MFR Bit in the STATUS_WORD

• Sets the Overtemperature Fault Bit in the STATUS_MFR_SPECIFIC Command

• Notifies the Host by Asserting ALERT, Unless Masked

Supported Values:

VALUE

MEANING

0xC0

The LTC3888-1 continues to operate indefinitely with the normal hardware response described in the Operation section.

0x80

The LTC3888-1 shuts down immediately and does not attempt to restart. The output remains disabled until the fault is cleared and the unit

is commanded off and then on, or IC supply power is cycled.

Programming an unsupported MFR_OT_FAULT_RESPONSE value will generate a CML fault and the command will be

ignored.

This command has one data byte.

TON_MAX_FAULT_RESPONSE

The TON_MAX_FAULT_RESPONSE command instructs the device on what action to take in response to a TON_MAX

fault. The format for this command is given in Table 14. The device also:

• Sets the VOUT Bit in the STATUS_WORD

• Sets the TON_MAX Fault Bit in the STATUS_VOUT Command

• Notifies the Host by Asserting ALERT, Unless Masked

This command has one data byte.

PMBus COMMAND DETAILS (Fault Response and Communication)

LTM4677 Datasheet(PDF) 102 Page - Analog Devices