Applications information – Rainbow Electronics MAX16064 User Manual
Page 49
MAX16064
±0.3% Accurate, Quad, Power-Supply Controller with
Active-Voltage Output Control and PMBus Interface
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Table 21. MFR_FAULT_REASON Bit Definition (continued)
BIT
BIT NAME
DESCRIPTION
10
Reserved
Reserved
9
VFMIN2
1 = Voltage at RS2 is less than the VOUT_UV_FAULT_LIMIT.
0 = Voltage at RS2 greater than or equal to VOUT_UV_FAULT_LIMIT.
8
VFMAX2
1 = Voltage at RS2 is greater than the VOUT_OV_FAULT_LIMIT.
0 = Voltage at RS2 less than or equal to VOUT_OV_FAULT_LIMIT.
7
Reserved
Reserved
6
Reserved
Reserved
5
VFMIN1
1 = Voltage at RS1 is less than the VOUT_UV_FAULT_LIMIT.
0 = Voltage at RS1 greater than or equal to VOUT_UV_FAULT_LIMIT.
4
VFMAX1
1 = Voltage at RS1 is greater than the VOUT_OV_FAULT_LIMIT.
0 = Voltage at RS1 less than or equal to VOUT_OV_FAULT_LIMIT.
3
Reserved
Reserved
2
Reserved
Reserved
1
VFMIN0
1 = Voltage at RS0 is less than the VOUT_UV_FAULT_LIMIT.
0 = Voltage at RS0 greater than or equal to VOUT_UV_FAULT_LIMIT.
0
VFMAX0
1 = Voltage at RS0 is greater than the VOUT_OV_FAULT_LIMIT.
0 = Voltage at RS0 less than or equal to VOUT_OV_FAULT_LIMIT.
MFR_FAULT_VOUT (E3h)
The MFR_FAULT_VOUT command returns VOUT at the
time a voltage fault was triggered.
MFR_FAULT_TEMP (E4h)
The MFR_FAULT_TEMP command returns the tempera-
ture at the time a temperature fault was triggered.
Applications Information
Performance Consideration
The MAX16064 can be viewed as a task scheduler
where it periodically goes through its task list and per-
forms the required tasks. While it may be tempting to
monitor the power supplies at the highest supported
frequency, MFR_SAMPLE_RATE, it must be noted that
doing so takes away resources from other tasks, such
as communication with the system controller. Since
each application is unique in its own merit, it is impossi-
ble to prescribe a solution that suffices in all conditions.
System designers are thus urged to derive optimum
configuration based on the particular system needs.
Graphic User Interface (GUI)
The MAX16064 Evaluation Kit comes with a free GUI
that eliminates the need for any software development
and provides a simple and user-friendly method for
configuring large systems in a short time. Once the
configuration is complete, the results can be saved to
the external EEPROM for MAX16064 configuration on
power-up, or loaded at power-up onto the MAX16064
through the PMBus by a master controller. The powerful
MAX16064 feature set can be inferred from the GUI
screenshot shown in Figure 19, where the programma-
ble parameters are displayed. These parameter values
set serve as data bytes for PMBus and manufacturer-
specific commands supported by the MAX16064. For
details on using the GUI, refer to the MAX16064
Evaluation Kit.