Technical Reference Note
Rev.12.08.17_#1.1
ERM 10W Series
Page 53
Output Over Current Protection
To provide hiccup mode protection in a fault (output overload) condition, the unit is equipped with internal current limiting
circuitry and can endure overload for an unlimited duration.
Output Over Voltage Protection
The output overvoltage clamp consists of control circuitry, which is independent of the primary regulation loop, that
monitors the voltage on the output terminals.
The control loop of the clamp has a higher voltage set point than the primary loop. This provides a redundant voltage
control that reduces the risk of output overvoltage. The OVP level can be found in Table 3.
Maximum Capacitive Load
The ERM 10W series has limitation of maximum connected capacitance at the output. The power module may be operated
in current limiting mode during start-up, affecting the ramp-up and the startup time. The maximum capacitance can be
found in in Table 3.
Thermal Considerations
Many conditions affect the thermal performance of the power module, such as orientation, airflow over the module and
board spacing. To avoid exceeding the maximum temperature rating of the components inside the power module, the case
temperature must be kept below 105℃. The derating curves are determined from measurements obtained in a test setup.
.
Position of air velocity
probe and thermocouple
Air Flow
50mm / 2in
15mm / 0.6in
DUT
ARTESYN [ ARTESYN TECHNOLOGIES ]
