550W AC DC Open Frame Switching Power Supply with PFC function
single output
Features
l Universal 90 - 264VAC or 127 - 370VDC input voltage
l Compact size 5” × 3”
l Operating ambient temperature range: -40℃ to +70℃
l Built-in active PFC function
l Output short circuit, over-current, over-voltage protection, over-temperature protection
l 320W with air cooling, 550W with 25CFM
l 5VDC standby output, 12VDC fan supply
l PG signal and remote sensing function
Descriptions
LOF550-20Bxx series is one of Mornsun’s AC-DC miniaturize open frame power supply and suitable for all kinds of BF type (be accessible to patients) medical system equipment.It features universal AC input and at the same time accepts DC input voltage,cost-effective,low no load power consumption,high efficiency,high reliability and double or reinforced insulation.These converters offer excellent EMC performance and meet IEC/EN/UL62368,GB4943,IEC/EN60335,IEC/EN61558,IEC/EN/ES60601-1 standards and they are widely used in areas of industrial,LED,street light control,electricity,security,telecommunications,smart home,etc.
Specifications
| Selection Guide |
Certification |
Part No.* |
Cooling method |
Output Power * | Nominal Output Voltage and Current(Vo/Io) | Output Voltage Adjustable Range ADJ (V) | Efficiency at 230VAC (%) Typ. * |
Capacitive Load (µF) Max. |
UL/EN | LOF550-20B12 | Air cooling | 320.4 | 12V/26.7 | 11.4 -12.6 | 91 | 6000 |
| 25CFM | 499.2 | 12V/41.6 |
LOF550-20B15 | Air cooling | 319.5 | 15V/21.3 |
14.25 -15.75 |
92 |
6000 |
| 25CFM | 499.5 | 15V/33.3 |
-- |
LOF550-20B18 | Air cooling | 320.4 | 18V/17.8 |
17.1-19.9 |
92.5 |
6000 |
| 25CFM | 500.4 | 18V/27.8 |
LOF550-20B19 | Air cooling | 319.2 | 19V/16.8 |
| 25CFM | 499.7 | 19V/26.3 |
UL/EN | LOF550-20B24 | Air cooling | 321.6 | 24V/13.4 | 22.8 -25.2 | 93 | 6000 |
| 25CFM | 549.6 | 24V/22.9 |
| LOF550-20B27 | Air cooling | 321.3 | 27V/11.9 | 25.65 - 28.35 | 93.5 | 4000 |
| 25CFM | 550.8 | 27V/20.4 |
| LOF550-20B36 | Air cooling | 320.4 | 36V/8.9 | 34.2 - 37.8 | 94 | 3000 |
| 25CFM | 550.8 | 36V/15.3 |
LOF550-20B48 | Air cooling | 321.6 | 48V/6.7 |
45.6 - 50.4 |
94 |
2000 |
| 25CFM | 550 | 48V/11.46 |
-- |
LOF550-20B54 | Air cooling | 310.5 | 54V/5.75 |
51.3 - 56.7 |
94 |
1500 |
| 25CFM | 550.8 | 54V/10.2 |
Notes: 1.*Under any conditions, the total power of the product
should not exceed the rated power. When the output voltage is
increased, the total output power cannot exceed the rated output power, when the output voltage is decreased, the output current cannot exceed the rated output current; 2.*When measuring the full load efficiency, the fan should be connected to an external power supply. Fan loss is not included in the input power; 3.*LOF Products with shell is also available, named
LOF550-20Bxx-C/CF. |
| Input Specifications |
| Item | Operating Conditions | Min. | Typ. | Max. | Unit |
| Input Voltage Range | AC input | 90 | -- | 264 | VAC |
| DC input | 127 | -- | 370 | VDC |
| Input Frequency | | 47 | -- | 63 | Hz |
Input Current | 115VAC | -- | -- | 6.5 |
A |
| 230VAC | -- | -- | 3.0 |
Inrush Current | 115VAC | Cold start | -- | 50 | -- |
| 230VAC | -- | 80 | -- |
Power Factor | 115VAC | Full load | 0.98 | -- | -- | -- |
| 230VAC | 0.95 | -- | -- | -- |
Leakage Current |
264VAC | Contact leakage current | ＜0.1mA |
| Earth leakage current | ＜0.5mA |
| Hot Plug | | Unavailable |
| Mechanical Specifications |
| Case Material | Open Frame |
| Dimension | 127×76.2×40.5mm |
| Weight | 490g (Typ.) |
| Cooling Method* | 310W/320W Air cooling; 500W/550W 25CFM |
| Notes: *Please refer to the product characteristic curve for
cooling method and power derating. |
Dimensions and Recommended Layout
