LTM2987 datasheet(97/114 Pages) AD

97 / 114 page

LTC2971

Rev. 0

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APPLICATIONS INFORMATION

Figure 27. Channel Fault Management Block Diagram

CHANNEL 0

EVENT PROCESSOR

PAGE = 0

MFR_FAULTB0_RESPONSE, PAGE = 0

MFR_FAULTB1_RESPONSE, PAGE = 0

MFR_FAULTB0_PROPAGATE_CHAN0

FAULTB0

FAULTED_OFF

MFR_FAULTB1_PROPAGATE_CHAN0

CHANNEL 1

EVENT PROCESSOR

PAGE = 1

MFR_FAULTB0_RESPONSE, PAGE = 1

MFR_FAULTB1_RESPONSE, PAGE = 1

MFR_FAULTB0_PROPAGATE_CHAN1

MFR_FAULTB1_PROPAGATE_CHAN1

FAULTB1

2971 F27

Multi-Channel Fault Management

Multi-channel fault management is handled using the

bidirectional FAULTB pins. Figure 27 illustrates the con-

nections between channels and the FAULTB pins.

• The MFR_FAULTBn_PROPAGATE command acts like

a programmable switch that allows faulted_off condi-

tions from a particular channel (PAGE) to propagate to

eitherFAULTBoutput.TheMFR_FAULTBn_RESPONSE

command controls similar switches on the inputs to

each channel that allow any channel to shut down

in response to any combination of the FAULTB pins.

Channels responding to a FAULTB pin pulling low will

attempt a new start sequence when the FAULTB pin in

question is released by the faulted channel.

• A FAULTB pin can also be asserted low by an external

driver in order to initiate an immediate off-sequence

after a 10μs deglitch delay.

LTM2987 Datasheet(PDF) 97 Page - Analog Devices