Datasheet

LTC2977
42
2977fa
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STATUS_VOUT
The STATUS_VOUT command returns the summary of the output 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 V
IN
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 V
IN
Overvoltage fault
b[6] Status_input_ov_warn V
IN
Overvoltage warning
b[5] Status_input_uv_warn V
IN
Undervoltage warning
b[4] Status_input_uv_fault V
IN
Undervoltage fault
b[3] Status_input_off Unit is off for insufficient input voltage.
b[2] I
IN
overcurrent fault Not supported. Always returns 0.
b[1] I
IN
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 summary of the temperature faults or warnings which have oc-
curred, 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[3:0] Reserved Reserved. Always returns 0s.
PMBus COMMAND DESCRIPTION