MAX16064 Datasheet, PDF (45/52 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_SAMPLE_RATE (D3h)
The MFR_SAMPLE_RATE command sets the frequency
(Hz) at which the ADC conversion result registers (rep-
resenting four voltages and one temperature) are com-
pared with their threshold limits. This parameter does
not control the total ADC sampling rate, which is con-
trolled by MFR_VLTO. Also, the output-voltage adjust-
ment rate is not affected by this parameter.
Monitor Sample Frequency =
10kHz/MFR_SAMPLE_RATE
The 2 data bytes are formatted as positive integers. Valid
values are from 1 to 65535. Do not set this value to 0.
The default MFR_SAMPLE_RATE value is 50 which is
equivalent to a sample frequency of 200Hz.
MFR_VOUT_PEAK (D4h)
The MFR_VOUT_PEAK command returns the maximum
actual measured (not commanded) output voltage in
volts across RS_+ and RS_-. If the filter mode is
enabled, instead of returning the instantaneous value,
the filtered output voltage is returned. To reset this
value to 0, write to this command with a data value of 0.
Any other values written by this command are used as
a comparison for future peak updates.
The 2 data bytes are in DIRECT format. Valid values are
the same as VOUT_COMMAND.
The default MFR_VOUT_PEAK value is 0.
MFR_TEMPERATURE_PEAK (D6h)
The MFR_TEMPERATURE_PEAK command returns the
maximum actual on-chip measured temperature in
degrees Celsius. To reset this value to its lowest value,
write to this command with a data value of 0FFFFh. Any
other values written by this command are used as a
comparison for future peak updates.
The 2 data bytes are in DIRECT format. Valid values are
the same as OT_FAULT_LIMIT.
The default MFR_TEMPERATURE_PEAK value is 00h.
MFR_STATUS_WORD (D8h)
When a warning or fault condition is detected, the
MAX16064 sets the corresponding bit in the
MFR_STATUS_WORD register to 1 and notifies the host
using SMBALERT assertion. The MFR_STATUS_WORD
[7:0] (low byte) bits are the same definition and state as
the STATUS_BYTE command.
This register is cleared to 0 together with the STATUS_BYTE
register by any of the fault/warning clearing methods men-
tioned earlier in the CLEAR_FAULTS command.
The MFR_STATUS_WORD command value cannot be
restored by the RESTORE_DEFAULT_ALL command.
This command is read only.
Table 17. MFR_STATUS_WORD Bit Definition
BIT NUMBER
15
14
13
12
11
10
9
8
7
6
5
4
3
2
1
0
STATUS BIT NAME
EN_FAULT
OT_WARN
OT_FAULT
ADCERR_FAULT
N/A
UV_WARN
UV_FAULT
OV_WARN
BUSY
OFF
VOUT_OV
IOUT_OC
VIN_UV
TEMPERATURE
CML
OTHER
MEANING
EN input is below its threshold when OPERATION is on.
Overtemperature warning (Same as STATUS_TEMPERATURE bit 6).
Overtemperature fault (Same as STATUS_TEMPERATURE bit 7).
An ADC conversion fault has occurred.
This bit is reserved and always returns 0.
A VOUT undervoltage warning has occurred (same as STATUS_VOUT bit 4).
A VOUT undervoltage fault has occurred (same as STATUS_VOUT bit 5).
A VOUT overvoltage warning has occurred (same as STATUS_VOUT bit 6).
A fault was declared because the device was busy and unable to respond.
The BUSY bit is not supported. This bit always returns 0.
This bit is asserted if ENOUT is presently disabling the power supply, regardless of the
reason, including simply not being enabled.
An output overvoltage fault has occurred.
An output overcurrent fault has occurred.
The IOUT_OC bit is not supported. This bit always returns 0.
An input undervoltage fault has occurred.
The VIN_UV bit is not supported. This bit always returns 0.
A temperature fault or warning has occurred.
A communication, memory, or logic fault has occurred.
A fault or warning not listed in bits [7:1] has occurred.
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