Datasheet

LTC2974
60
2974fc
For more information www.linear.com/LTC2974
MFR_FAULTB0_RESPONSE and MFR_FAULTB1_RESPONSE
These manufacturer specific commands share the same format and specify the response to assertions of the FAULTB
pins. MFR_FAULTB0_RESPONSE determines which channels shut off when the FAULTB0 pin is asserted low and
MFR_FAULTB1_RESPONSE determines which channels shut off when the FAULTB1 pin is asserted low.When a chan
-
nel shuts off in response to a FAULTBn pin, the ALERTB pin is asserted low and the appropriate bit is set in the STA-
TUS_MFR_SPECIFIC register. For a graphical explanation, see the switches on the left hand side of Figure 28: Channel
Fault Management Block Diagram.
Faults will not
propagate for channels that
have MFR_FAULTBn_RESPONSE set to 0: The channel continues operation
without interruption. Note that this fault response is called No Action in LTpowerPlay.
MFR_FAULTB0_RESPONSE and MFR_FAULTB1_RESPONSE Data Contents
BIT(S) SYMBOL OPERATION
b[7:4] Reserved Read only, always returns 0000b.
b[3] Mfr_faultb0_response_chan3,
Mfr_faultb1_response_chan3
Channel 3 response.
0: The channel continues operation without interruption
1: The channel shuts down if the corresponding FAULTB pin is still asserted after 10µs. When the FAULTB pin
subsequently de-asserts, the channel turns back on, honoring TON_DELAY and TON_RISE settings.
b[2] Mfr_faultb0_response_chan2,
Mfr_faultb1_response_chan2
Channel 2 response.
0: The channel continues operation without interruption
1: The channel shuts down if the corresponding FAULTB pin is still asserted after 10µs. When the FAULTB pin
subsequently de-asserts, the channel turns back on, honoring TON_DELAY and TON_RISE settings.
b[1] Mfr_faultb0_response_chan1,
Mfr_faultb1_response_chan1
Channel 1 response.
0: The channel continues operation without interruption
1: The channel shuts down if the corresponding FAULTB pin is still asserted after 10µs. When the FAULTB pin
subsequently de-asserts, the channel turns back on, honoring TON_DELAY and TON_RISE settings.
b[0] Mfr_faultb0_response_chan0,
Mfr_faultb1_response_chan0
Channel 0 response.
0: The channel continues operation without interruption
1: The channel shuts down if the corresponding FAULTB pin is still asserted after 10µs. When the FAULTB pin
subsequently de-asserts, the channel turns back on, honoring TON_DELAY and TON_RISE settings.
pMbus coMManD DescripTion