LTC2978 datasheet(32/64 Pages) LINER

32 / 64 page

LTC2978

2978fa

operaTion

STATUS_VOUT

The STATUS_VOUT command returns the summary of

the voltage faults or warnings which have occurred, as

shown in the following table:

STATUS_VOUT Data Contents

BIT(S) SYMBOL

OPERATION

b[7] Status_vout_ov_fault

Overvoltage fault.

b[6] Status_vout_ov_warn

Overvoltage warning.

b[5] Status_vout_uv_warn

Undervoltage warning

b[4] Status_vout_uv_fault

Undervoltage fault.

b[3] Status_vout_max_fault

VOUT_MAX fault. An attempt

has been made to set the output

voltage to a value higher than

allowed by the VOUT_MAX

command.

b[2] Status_vout_ton_max_fault TON_MAX_FAULT sequencing

fault.

b[1] Status_vout_toff_max_warn Not supported. Always returns 0.

b[0] Status_vout_tracking_error Not supported. Always returns 0.

STATUS_INPUT

The STATUS_INPUT command returns the summary of

the VIN faults or warnings which have occurred, as shown

in the following table:

STATUS_INPUT Data Contents

BIT(S) SYMBOL

OPERATION

b[7] Status_input_ov_fault

VIN Overvoltage fault

b[6] Status_input_ov_warn VIN Overvoltage warning

b[5] Status_input_uv_warn VIN Undervoltage warning

b[4] Status_input_uv_fault

VIN Undervoltage fault

b[3] Status_input_off

Unit is off for insufficient input voltage.

b[2] IIN overcurrent fault

Not supported. Always returns 0.

b[1] IIN overcurrent warn

Not supported. Always returns 0.

b[0] PIN overpower warn

Not supported. Always returns 0.

STATUS_TEMPERATURE

The STATUS_TEMPERATURE command returns the sum-

mary of the temperature faults or warnings which have

occurred, as shown in the following table:

STATUS_TEMPERATURE Data Contents

Bit(s) Symbol

Operation

b[7]

Status_temperature_ot_fault

Overtemperature fault.

b[6]

Status_temperature_ot_warn

Overtemperature warning.

b[5]

Status_temperature_ut_warn

Undertemperature warning.

b[4]

Status_temperature_ut_fault

Undertemperature fault.

b[3]

Reserved

Reserved. Always returns 0.

b[2]

Reserved

Reserved. Always returns 0.

b[1]

Reserved

Reserved. Always returns 0.

b[0]

Reserved

Reserved. Always returns 0.

STATUS_CML

The STATUS_CML command returns the summary of the

communication, memory and logic faults or warnings

which have occurred, as shown in the following table:

STATUS_CML Data Contents

BIT(S) SYMBOL

OPERATION

b[7]

Status_cml_cmd_fault

1 = An illegal or unsupported

command fault has occurred.

0 = No fault has occurred.

b[6]

Status_cml_data_fault

1 = Illegal or unsupported data

received.

0 = No fault has occurred.

b[5]

Status_cml_pec_fault

1 = A PEC fault has occurred.

0 = No fault has occurred.

b[4]

Status_cml_memory_fault

1 = A fault has occurred in the

NVM.

0 = No fault has occurred.

b[3]

Status_cml_processor_fault Not supported, always returns 0.

b[2]

Reserved

Not supported, always returns 0.

b[1]

Status_cml_PMBus_fault

1 = A communication fault other

than ones listed in this table has

occurred.

0 = No fault has occurred.

b[0]

Status_cml_unknown_fault

Not supported, always returns 0.

LTC2978 Datasheet(PDF) 32 Page - Linear Technology

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