The Emerson/Artesyn/Astec LPQ252-C is a 250 W enclosed power supply module designed for industrial and embedded systems requiring multi-output DC conversion. It accepts wide-range AC and DC inputs (85–264 VAC, 120–300 VDC, 47–440 Hz) and delivers four independently regulated outputs with active power factor correction and built-in EMI filtering.
## Technical Specifications
Input stage operates across 85–264 VAC or 120–300 VDC at 47–440 Hz with 0.99 typical power factor and IEC/EN61000-3-2 compliance. Maximum inrush current is 20 A at cold start (25°C). Four isolated outputs provide: +5 V at 35 A continuous (40 A peak), +12 V at 10 A continuous (12 A peak), −12 V at 6 A continuous (8 A peak), and a fourth adjustable output (±5 V to ±25 V nominal) at 6 A continuous (8 A peak). Peak currents are limited to less than 30 seconds with maximum 10% duty cycle.
Output voltage regulation (typical at 25°C): ±2% on the 5 V rail; ±3% on all others. Ripple and noise (peak-to-peak): 50 mV on +5 V, 120 mV on ±12 V outputs, 240 mV maximum on the adjustable fourth output. The 5 V supervisory output supplies 100 mA regulated; the 12 V supervisory output supplies 500 mA.
## Key Features
• Short-circuit and overload protection on all four outputs; case protection at 110–145% above peak rating
• Overvoltage thresholds: 5.7–6.7 VDC on the 5 V rail; 10–25% above nominal on others
• Thermal overload protection
• Power fail and DC-OK signals (TTL logic) transition 50–150 msec after 5 V output, settling 4 msec before regulation loss
• Remote inhibit/on-off control via external contact (N.O. or N.C.)
• Remote sense compensates 0.5 V minimum lead drop; operates without remote sense; reverse-connection protected
• Single-wire current sharing capability
• Operating temperature: 0–50°C ambient with 2.5% per-degree derating from 50–70°C
## Typical Applications
Multi-rail embedded systems, industrial control boards, telecommunications equipment, and distributed power architectures requiring regulated positive and negative outputs with field-adjustable secondary rails.
## Compatibility & Integration
30 CFM forced-air cooling required for full 250 W output rating. Fourth output factory-set to 5 V with ±5% adjustment range on main outputs.
