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PMB-12V50W1AH Datasheet(PDF) 9 Page - Delta Electronics, Inc. |
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PMB-12V50W1AH Datasheet(HTML) 9 Page - Delta Electronics, Inc. |
9 / 11 page TECHNICAL DATASHEET PMT Panel Mount Power Supply 12V 50W 1 Phase / PMT-12V50W1AA 9 | www.DeltaPSU.com (August 2012, Rev. 00) Overload & Overcurrent Protections The power supply’s Overload (OLP) and Overcurrent (OCP) Protections will be activated when output current exceeds 150% of I O (Max load). 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. 0% Load 150% Load t (sec) Output Voltage (V O ) Load >150% (Output Hiccup) Additionally, if the I O is <150% but >100% for a prolong period of time (depending on the load), the Over Temperature Protection (OTP) will be activated due to high temperature on critical components. The power supply will then go into “Hiccup mode” until the fault 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”. Max OVP Level Variable O/P Voltage Range Typical Overvoltage Condition as seen at the O/P OVP Zero Output Nominal O/P Voltage Auto-Recovery to Normal Output Voltage Over Temperature Protection As mentioned above, the power supply also has Over Temperature Protection (OTP). This is activated when the overload condition persists for an extended duration and the output current is below the overload trigger point but >100% load. In the event of a higher operating condition at 100% load, the power supply will run into OTP when the surrounding air temperature is >80°C. When activated, the output voltage will go into bouncing mode until the operating surrounding air temperature drops to 50°C or output capacity is reduced as recommended in the de-rating graph. 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. |
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