High Efﬁciency Power Supplies
- 275 W AC-DC
- Up to 91% efﬁciency
- High power density: Over 12 W/cu in.
- 3” x 5” footprint
- All outputs may be paralleled
- Remote on/off
- 5 W, 5 V standby supply
- Universal AC input
- Active PFC (90 – 264 VAC)
- Built-in OR-ing MOSFET for N, N+1
- Active inrush current protection
- RoHS compliant
- PMBusTM interface for digital power management (optional)
- 3-Year Warranty
The microcontroller enables the main output whenever all the required startup conditions are met, and shuts it down upon command, loss of input power or whenever excessive temperatures or loads are sensed. It always provides advanced warning of an impending shutdown before output power is lost.
An optional PMBusTM digital communications interface is available to allow up to four XL275s to communicate over the same bus using the PMBusTM protocol. This interface allows routine remote control of the main outputs and the 12V fans. The host can also query the microcontroller for its output voltage and current plus the ambient and transformer temperatures and fan tachometer speed. Because it is programmable, the microcontroller code can be customized to meet unique OEM requirements.
ADVANCED DIGITAL CONTROLLER
The XL275 is the ﬁrst power supply in this class to use a 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
N2Power leads the power density race with its high efﬁciency XL275 Series AC -DC power supplies, which provide up to 91% efﬁciency. In fact, comparisons of efﬁciencies show that our supplies can reduce energy losses by up to 50%. Our advanced technology yields a very small footprint and offers the highest power density in its class. This unique design also generates less wasted heat—reducing the need for forced air cooling, decreasing AC power consumption, increasing reliability, and maximizing its economy of operation. By building our power supplies with a focus on maximizing efﬁciency, we can provide our valued customers with reduced energy costs, longer product lifespans, and a greater return on their investment.