Huawei ADF10S48B Technical Manual page 20

ADF10S48B
AC-DC Converter Technical Manual V1.1
PMBus Communication
MFR_READ_LAST_ACDROP_TIME (EFh):
Reads the last disconnection time recorded by the
module. The EFh data format is shown in the
figure. The time occupies four bytes and the high-
order byte takes precedence over the low-order
byte during transmission.
The MFR_READ_LAST_ACDROP_TIME
command format is shown in Figure 40.
Figure 40: MFR_READ_LAST_ACDROP_TIME
command format
The module uses 8-bit cyclic redundancy check
(CRC). The generator polynomial is C(x) = x8 + x2
+ x1 + 1, or 0b100000111 if expressed in binary
form.
The module complies with the PMBus Protocol
Specification rev1.2 requirements. For details about
the PMBus commands, see the PMBus Protocol
Specification rev1.2.
Input Overvoltage Protection
The module will shut down after the input voltage
exceeds the input overvoltage protection
threshold. The module will start to work again
after the input voltage reaches the input
overvoltage recovery threshold. For the
hysteresis, see the Protection characteristics.
Input Undervoltage Protection
The module will shut down after the input voltage
drops below the undervoltage protection
threshold. The module will start to work again
after the input voltage reaches the input
undervoltage recovery threshold. For the
hysteresis, see the Protection characteristics.
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Output Overvoltage Protection
When the output voltage exceeds the output
overvoltage protection threshold, the module will
enter hiccup mode. If the module experiences five
or more times of overvoltage due to an internal fault
within 20s, the module latches off. You need to
restart the module to unlock it. You must power on
the module at least 20s after powering off it. The
module dynamic overvoltage does not exceed 69 V.
Output Overcurrent Protection
When the output current exceeds the output
overcurrent protection threshold, the module will
enter hiccup mode. When the fault condition is
removed, the converter will automatically restart.
Overtemperature Protection
A temperature sensor on the module senses the
average temperature of the module. It protects the
module from being damaged at high temperatures.
When the temperature exceeds the
overtemperature protection threshold, the output
will shut down. If the temperature drops below the
overtemperature protection recovery threshold
more than 5 minutes after the module shuts down,
the output recovers. Note that the sensor does not
sense the temperature within 5 minutes after the
output shuts down. Therefore, even if the
temperature drops to a very low level within 5
minutes after the output shuts down, there is still
no output.
Cooling Characteristics
When the module is running, the temperature of
the baseplate must not exceed 90°C. The module
supports natural cooling and fan cooling.
Customers can select heat sink models
depending on the onsite conditions.
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