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- 275 W AC-DC /3” X 5” FOOTPRINT
- UP TO 90% EFFICIENCY
- HIGH POWER DENSITY: OVER 12 W/in3
- ALL OUTPUTS MAY BE PARALLELED
- REMOTE ON /OFF
- 5W 5V STANDBY SUPPLY
- UNIVERSAL AC INPUT
- ACTIVE PFC (90 – 264 VAC)
- BUILT IN OR’ING MOSFET FOR N, N+1
- INRUSH CURRENT PROTECTION
- RoHS COMPLIANT
- I2C INTERFACE FOR DIGITAL POWER MANAGEMENT
Power Supply Design Leader
N2Power leads the power density race with small high efficiency open frame XL275 Series AC-DC power supplies.
Our unique technology yields a small footprint power supplies that reduces wasted power, and offers the highest power density in the market in the 275 watt range. This advanced design means reduced energy costs, higher reliability and longer product life.
Unmatched Power Density:
The small footprint of the XL275 Series, just 1.25"x3.00"x5.00" yields a high power density over 12 watts per cubic inch, making it really suited for OEM manufacturers using industry standard 1U chassis.
N2Power’s small form factor design frees up additional “real estate” for more functionality inside your product. The descreased space and
reduced thermal load serve to lower costs and increase your competitive edge.
Reduced heat generation is a key design requirement in AC-DC power supplies. The XL275 Series delivers up to 90%efficiency. Its unique high efficiency design reduces energy consumption and generates less waste heat. The open frame construction requires minimal forced air cooling which increases reliability, decreases AC loads and improves overall economy of operation.
Advanced Digital Controller:
Power supplies have traditionally been controlled and protected by analog circuitry that does well under one set of conditions (such as cold startup), but suffers from stored charges in components that do not discharge quickly enough to respond to power line dropouts and load glitches.
The XL275 is the first power supply in this class to use a dedicated digital microcontroller to supervise the unit’s
operation. The microcontroller monitors the following parameters:
- DC voltage on the bulk capacitor (supplied by the AC mains)
- Output voltage
- Output current
- Auxiliary 12V output voltage
- Transformer temperature
- Ambient temperature
- Fan tachometer
Unlike conventional analog circuitry that can provide timing accuracies in the range of ±10%-20%, the microcontroller can provide accuracies in the 1% range and does not suffer from stored charge memory. It responds to changing conditions 500 times each second.
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XL275 AC-DC Power Supply
Complete Protection
The microcontroller is responsible for enabling the main output whenever all of the required startup conditions are met, and shutting it
down upon command, loss of input power or whenever excessive loads or temperatures are sensed. It always provides the host system with advanced warning of an impending shutdown to enable it to perform housekeeping before ower is lost.
Reduced Noise
To minimize acoustic noise, the microcontroller can turn a 12V fan on or off based upon the load conditions and the amount of
cooling air available.
I2C Bus Option
An optional I2C digital communications interface is also provided to allow up to four XL275 to communicate over the same bus using the PMBus™ protocol. This interface allows routine remote control of the main outputs and the 12V fans. It can also notify the host if a fan fails (lost tachometer pulses). The host can also query the microcontroller for its output voltage and current plus the ambient and transformer temperatures.
OEM Customization
Because it is programmable, the microcontroller code can be customized to meet unique OEM requirements.
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