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PJ-48V50WCNA Datasheet(PDF) 10 Page - Delta Electronics, Inc. |
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PJ-48V50WCNA Datasheet(HTML) 10 Page - Delta Electronics, Inc. |
10 / 12 page TECHNICAL DATASHEET PJ Open Frame Power Supply 48V 50W 1 Phase / PJ-48V50W □NA All parameters are specified at 25°C ambient unless otherwise noted. www.DeltaPSU.com (May 2013, Rev. 01) 10 Dynamic Response Inrush Current Inrush current is the peak, instantaneous, input current measured and, occurs when the input voltage is first applied. For AC input voltages, the maximum peak value of inrush current will occur during the first half cycle of the applied AC voltage. This peak value decreases exponentially during subsequent cycles of AC voltage. 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”. The power supply should be latch. 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. Overload & Overcurrent Protections The power supply’s Overload (OLP) and Overcurrent (OCP) Protections will be activated when output current exceeds 105% of IO (Max load). In such occurrence, the VO 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 IO is back within the specifications. Additionally, if the IO is <105% 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 latch mode until the fault is removed and the mains is reapplied. 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 higher than the operating temperature. When activated, the output voltage will go into latch mode until the mains is reapplied and the surrounding air temperature drops to its normal operating temperature. The power supply output voltage will remain within ±5% of its steady state value, when subjected to a dynamic load from 0 to 50% and 50 to 100% of its rated current. ■ 0 to 50% Load ■ 50 to 100% Load |
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