LTC2978 datasheet(39/64 Pages) LINER

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LTC2978

2978fa

operaTion

MFR_FAULTB00_RESPONSE, MFR_FAULTB01_

RESPONSE, MFR_FAULTB10_RESPONSE and MFR_

FAULTB11_RESPONSE

These manufacturer specific commands share the same

format and specify the response to assertions of the bidi-

rectional fault pins. For fault zone 0, MFR_FAULTB00_RE-

SPONSE determines how channels 0-3 respond when

the FAULTB00 pin is asserted, and MFR_FAULTB01_

RESPONSE determines how channels 0-3 respond

when the FAULTB01 pin is asserted. For fault zone 1,

MFR_FAULTB10_RESPONSE determines how channels

4-7 respond when the FAULTB10 pin is asserted, and

MFR_FAULTB11_RESPONSE determines how channels

4-7 respond when the FAULTB11 pin is asserted. If one

or more bits in the MFR_FAULTBzn_RESPONSE registers

are set, a FAULTBzn assertion will cause the ALERTB pin to

assertlowandsettheappropriatebitintheSTATUS_MFR_

SPECIFIC register.

Data Contents—Fault Zone 0 Response Commands

BIT(S) SYMBOL

OPERATION

b[7:4] Reserved

Read only, always returns 0s.

b[3]

Mfr_faultb00_response_chan3,

Mfr_faultb01_response_chan3

Channel 3 response.

0: The channel continues operation without interruption.

1: The channel shuts down if the corresponding FAULTBzn pin is still asserted after 10µs. When the FAULTBzn

pin subsequently deasserts, the channel turns back on, honoring TON_DELAY and TON_RISE settings.

b[2]

Mfr_faultb00_response_chan2,

Mfr_faultb01_response_chan2

Channel 2 response.

0: The channel continues operation without interruption.

1: The channel shuts down if the corresponding FAULTBzn pin is still asserted after 10µs. When the FAULTBzn

pin subsequently deasserts, the channel turns back on, honoring TON_DELAY and TON_RISE settings.

b[1]

Mfr_faultb00_response_chan1,

Mfr_faultb01_response_chan1

Channel 1 response.

0: The channel continues operation without interruption.

1: The channel shuts down if the corresponding FAULTBzn pin is still asserted after 10µs. When the FAULTBzn

pin subsequently deasserts, the channel turns back on, honoring TON_DELAY and TON_RISE settings.

b[0]

Mfr_faultb00_response_chan0,

Mfr_faultb01_response_chan0

Channel 0 response.

0: The channel continues operation without interruption.

1: The channel shuts down if the corresponding FAULTBzn pin is still asserted after 10µs. When the FAULTBzn

pin subsequently deasserts, the channel turns back on, honoring TON_DELAY and TON_RISE settings.

Data Contents—Fault Zone 1 Response Commands

BIT(S) SYMBOL

OPERATION

b[7:4] Reserved

Read only, always returns 0s.

b[3] Mfr_faultb10_response_chan7,

Mfr_faultb11_response_chan7

Channel 7 response.

0: The channel continues operation without interruption.

1: The channel shuts down if the corresponding FAULTBzn pin is still asserted after 10µs. When the FAULTBzn

pin subsequently deasserts, the channel turns back on, honoring TON_DELAY and TON_RISE settings.

b[2] Mfr_faultb10_response_chan6,

Mfr_faultb11_response_chan6

Channel 6 response.

0: The channel continues operation without interruption.

1: The channel shuts down if the corresponding FAULTBzn pin is still asserted after 10µs. When the FAULTBzn

pin subsequently deasserts, the channel turns back on, honoring TON_DELAY and TON_RISE settings.

b[1] Mfr_faultb10_response_chan5,

Mfr_faultb11_response_chan5

Channel 5 response.

0: The channel continues operation without interruption.

1: The channel shuts down if the corresponding FAULTBzn pin is still asserted after 10µs. When the FAULTBzn

pin subsequently deasserts, the channel turns back on, honoring TON_DELAY and TON_RISE settings.

b[0] Mfr_faultb10_response_chan4,

Mfr_faultb11_response_chan4

Channel 4 response.

0: The channel continues operation without interruption.

1: The channel shuts down if the corresponding FAULTBzn pin is still asserted after 10µs. When the FAULTBzn

pin subsequently deasserts, the channel turns back on, honoring TON_DELAY and TON_RISE settings.

LTC2978 Datasheet(PDF) 39 Page - Linear Technology

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