LTC3882-1
100
Rev A
For more information
PMBus COMMAND DETAILS
(Fault Response and Communication)
Supported Values:
BIT
PROPAGATED CONDITION
15
Waiting for V
OUT
decay before restart.
14
V
OUT
short cycled (automatically deasserted 120ms after V
OUT
is fully OFF).
13
TON_MAX_FAULT_LIMIT exceeded.
12
(Reserved, must be set to 0).
11
MFR_OT_FAULT_LIMIT exceeded.
10
(Reserved, must be set to 0).
9
(Reserved, must be set to 0).
8
UT_FAULT_LIMIT exceeded.
7
OT_FAULT_LIMIT exceeded.
6
(Reserved).
5
(Reserved).
4
VIN_OV_FAULT_LIMIT exceeded.
3
(Reserved).
2
IOUT_OC_FAULT_LIMIT exceeded.
1
VOUT_UV_FAULT_LIMIT exceeded.
0
VOUT_OV_FAULT_LIMIT exceeded.
This command has two data bytes.
MFR_FAULT_RESPONSE
The MFR_FAULT_RESPONSE command instructs the device on what action to take in response to a
FAULT
pin being
pulled low by anything other than an internal fault.
Supported Values:
VALUE
MEANING
0xC0
Related PWM output is immediately disabled.
0x00
Input ignored, PWM operation continues without interruption.
When a FAULT pin is low, the device also:
• Sets the MFR_SPECIFIC Bit in the STATUS_WORD
• Sets Bit 0 in the STATUS_MFR_SPECIFIC Command to Indicate
FAULT
Is or Has Been Low
• Notifies the Host by Asserting
ALERT
, Unless Masked
This command has one data byte.
