Description
FEATURES
– Fully supports IEEE802.3af Standard and IEEE802.3at Standard
– Input Voltage Range 44V to 57V
– Short Circuit Protection
– In-rush Current Limit
– Over-temperature Protection
– Programmable Classification (Default :Class 4)
– High Efficiency
– Easy Installation and Low Cost (Isolation Type, Minimum External Devicesrequired)
– Low Output Ripple and Noise
– Adjustable Output Voltage
1500Vrms Isolation (Input-Output)
1. PIN ASSIGNMENT
| Pin # | Name | Description |
| 1.2 | NC | Do Not Connect |
| 3 | VA 1 | Input (1). This input pin connects to the centre tap of the transformerconnected to pins 1&2 of the RJ45 connector. It is not polarity sensitive |
| 4 | VA 2 | Input (2). This input pin connects to the centre tap of the transformer
connected to pins 3&6 of the RJ45 connector. It is not polarity sensitive |
| 5 | VB 1 | Direct Input (1). This input pin connects to pin 4&5 of the
connector(or centretap of 7&8). It is not polarity sensitive |
| 6 | VB 2 | Direct Input (2). This input pin connects to pin7&8 of the
Connector(or centretap of 7&8).lt is not polarity sensitive. |
| 7.8 | -VDC | Negative DC Output. This pin provides the -VDC output. |
| 9.10 | +VDC | Positive DC Output. This pin provides the +VDC output. |
| (1) Is typically 25 ℃, measured under the 48V power supply environment, only for reference design (2) Do not exceed the recommended load value of 850mA (not included IR-cut switch) to adapt to different environments |
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ELECTRICAL SPECIFICATIONS
| NO. | Item | Specification |
| 1 | Input Voltage | 44~57V |
| 2 | Output Voltage | 12V |
| 3 | Output Current (Vin=56V) | 2.5A Max. |
| 4 | Line Regulation | 2% |
| 5 | Load Regulation | 2% |
| 6 | Ripple & Noise | 200mVp-p max. |
| 7 | Efficiency | 88% min. |
| 8 | Input to Output Isolation | 1500 Vrms |
| 9 | Type of DC/DC Converter | Flyback Type |
| 10 | Operating Temperature | -40 ~ +85 ℃ |
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