MAX16064 Datasheet, PDF (46/52 Pages) Maxim Integrated Products – ±0.3% Accurate, Quad, Power-Supply Controller with Active-Voltage Output Control and PMBus Interface

±0.3% Accurate, Quad, Power-Supply Controller with
Active-Voltage Output Control and PMBus Interface
MFR_FAULT_RESPONSE (D9h)
The MFR_FAULT_RESPONSE command specifies the
response to each fault condition supported by the
MAX16064. Each fault has 2 response bits that
describe how the MAX16064 responds to that particular
fault. It is also used to record the condition under which
a fault occurs.
The STORE_PEAK function is used to store peak values
(MFR_VOUT_PEAK and MFR_TEMPERATURE_PEAK) to
the EEPROM (if present) on a fault detection regardless
of the status of the EEPROM Lock Enable bit. Setting the
STORE_PEAK bit to 1 enables the store function.
MFR_FAULT_RETRY (DAh)
The MFR_FAULT_RETRY command sets the time
between restarting the power supply if the fault
response is to restart the power supply at specified
intervals. This command sets the retry time delay in
multiples of 100µs. This command value is used for all
fault responses that require delay retry.
Delay Retry Time = MFR_FAULT_RETRY [15:0] x 100µs
The 2 data bytes are in DIRECT format. Valid values are
from 0 to 3.2768s. When MFR_FAULT_RETRY = 00h,
the MAX16064 restarts the power supply at the next
available time period.
The default MFR_FAULT_RETRY value is 00h.
Table 18. MFR_FAULT_RESPONSE Bit Definition
BITS
15
FAULT RESPONSE BIT NAME
1 = Save fault data to EEPROM.
0 = Do not save fault data to EEPROM.
14
1 = Lock EEPROM to further fault status writes after saving state (see bit 15).
0 = Do not lock the EEPROM to further fault status writes.
13:8
Reserved
7:6
OT_FAULT_RESPONSE[1:0]
5:4
EN_FAULT_RESPONSE[1:0]
3:2
VOUT_UV_FAULT_LIMIT_RESPONSE[1:0]
1:0
VOUT_OV_FAULT_LIMIT_RESPONSE[1:0]
Table 19. Fault Response Options
RESPONSE[1:0]
11
10
FAULT RESPONSE OPTION
Set the corresponding fault bit in the fault status register, assert SMBALERT, save fault state to EEPROM
(if enabled by bit 15) and continue operation.
Set the corresponding fault bit in the fault status register, assert SMBALERT, shut down the power supply
(deassert ENOUT) and restart the power supply every T (µs), where T is set in the MFR_FAULT_RETRY
register.
01
Set the corresponding fault bit in the fault status register, assert SMBALERT and shutdown the power
supply. Store fault data to EEPROM if enabled by bit 15.
00
Set the corresponding fault bit in the fault status register, assert SMBALERT and continue operation without
any action.
46 ______________________________________________________________________________________