PMT Panel Mount Power Supply
4.2V 252W 1 Phase / PMT-4V350W1A
□
TECHNICAL DATASHEET
All parameters are specified at 25°C ambient unless otherwise indicated.
www.DeltaPSU.com (October 2014, Rev. 02)
12
Overload & Overcurrent Protections
The power supply’s Overload (OLP) and Overcurrent (OCP)
Protections will be activated when output current exceeds
105~135% of rated load current. In such occurrence, the V
O
will start to droop and once the power supply has reached its
maximum power limit, the protection is activated and the power
supply will go into “Hiccup mode” (Auto-Recovery). The power
supply will recover once the fault condition of the OLP and
OCP is removed and I
O
is back within the specifications.
It is not recommended to prolong the duration of I
O
when it is
<
105~135%
but >100%, since it may cause damage to the
PSU.
Short Circuit Protection
The power supply’s output OLP/OCP function also provides
protection against short circuits. When a short circuit is applied,
the output current will operate in “Hiccup mode”, as shown in
the illustration in the OLP/OCP section on this page. The
power supply will return to normal operation after the short
circuit is removed.
Overvoltage Protection
The power supply’s overvoltage circuit will be activated when
its internal feedback circuit fails. The output voltage shall not
exceed its specifications defined on Page 3 under
“Protections”.
Over Temperature Protection
As mentioned above, the power supply also has Over
Temperature Protection (OTP). In the event of a higher
operating temperature at 100% load, the power supply will run
into OTP when the operating temperature is beyond what is
recommended in the de-rating graph. When activated, the
output voltage will go into bouncing mode until the temperature
drops to its normal operating temperature as recommended in
the de-rating graph.
Others
Delta RoHS Compliant
Restriction of the usage of hazardous substances
The European directive 2011/65/EU limits the maximum impurity level of homogeneous materials such as lead,
mercury, cadmium, chrome, polybrominated flame retardants PBB and PBDE for the use in electrical and
electronic equipment. RoHS is the abbreviation for “Restriction of the use of certain hazardous substances in
electrical and electronic equipment”.
This product conforms to this standard.
