Electronic Design

Power Supplies

AC-DC Switching Supplies Feature Power-Factor Correction
The IFC350 series of ac-dc power supplies suit rack-mounted network, telecom, and industrial applications where power-factor correction is required. These converters supply 350 W in an industry-standard U-bracket package measuring 9.9 by 5.0 by 2.56 in. Typical power factor is 0.98.

Eighteen models are available with single-, dual-, triple-, or quad-output voltages. Input voltages of 90 to 264 V ac are accepted without the need to configure the supply with jumpers, switches, or straps. Output voltage selections include 5.1, 12, 15, 24, 30, and 48 V dc. In OEM quantities, single-out devices cost about $120 and quad devices about $150.

International Power Sources Inc., 260 Hopping Brook Rd., Holliston, MA 01746; (508) 429-4440; fax (508) 429-4449; www.intlpower.com.

CompactPCI Power Systems Output A Maximum Of 2200 W
The cPCI 550 series 48-V dc input, centralized power supplies accommodate CompactPCI applications. These systems use under-the-chassis mounting and output up to 2200 W.

According to the company, the design of this system maximizes backplane space by locating more power directly below the backplane. Input voltage ranges from 36 to 72 V dc with a quad output of 550 W. It also features internal OR-ing diodes, overvoltage and overcurrent protection, thermal overload protection, remote sense, remote inhibit, and active current share. In OEM quantities, the cPCI 550 series systems start at $321.

Astec Power, 5810 Van Allen Way, Carlsbad, CA 92008; (760) 930-4600; fax (760) 930-4700; www.astec.com.

UPS Line Includes Line-Interactive And Offline Models
A line of uninterruptible power supplies (UPS) consists of single-phase, 115-V ac line-interactive and offline models. While smaller models provide a simulated sinewave output, larger models feature a pure sinewave option.

Strip, traditional, tower-style, and low-profile versions are available. Optionally, a commercial grade 19-in. rackmount version is also available. All models feature microprocessor control, advanced battery management, overload and short-circuit protection, 50/60-Hz auto-sensing, cold start, an energy-saving sleep mode, and surge protection on both the ac and tel/fax/modem ports. According to the company, these power supplies are suited for providing battery backup for computers, workstations, servers, e-commerce equipment, data and telecom equipment, industrial and commercial controls, and lighting systems. Contact the company for pricing and availability information. le

Leviton Manufacturing Co. Inc., 59-25 Little Neck Pkwy., Little Neck, NY 11362-2591; (800) 323-8920; fax (800) 832-9538; www.leviton.com.

200-W Hot-Swap Power Supplies Come In 1U Package
The L series ac-dc power supplies provide 7-W/in.3 power density in a compact 1.58- by 1.86- by 10.08-in. package. These 200-W hot-swap power supplies come in a 1U high package for maximum design flexibility.

These units can be used alone or combined to provide multiple outputs for powering a wide variety of computing and telecommunications applications. The single-output L series power supplies feature a 0.95 power factor and 80% typical efficiency. They are self-cooled, with an integral ball-bearing fan. A rugged enclosed chassis and interfaces ensure reliability and safety. Six models are offered, ranging in output from 1.8 V at 35 A to 48 V at 4.2 A. Standard features include overvoltage, overload, and short-circuit protection. Pricing for the L series power supplies starts at $197.

Deltron Inc., 290 Wissahickon Ave., North Wales, PA 19454; (800) 523-2332; fax (215) 699-2310; www.deltroninc.com.

Industrial Power Supplies Boast Compact, Lightweight Design
The MCS series industrial power supplies are engineered for easy plug-and-play DIN-rail mounting. According to the company, they have a compact and lightweight design compared to traditional linear power supplies. The devices are available in single-phase (1.5, 5, 10, and 20 A) and three-phase (10 and 20 A) configurations.

These supplies feature full protection against short circuit, overload, overvoltage, and overheating. They suit a wide range of applications, including industrial machinery, automation equipment, and automotive manufacturing. They are available with primary voltages of 115, 230, 400, and 480 V. Smooth, linear-regulated, and switch-mode types are available. For pricing and availability information, contact the company.

Murrelektronik Inc., 4030-B Skyron Dr., Doylestown, PA 18901; (888) 230-6877; fax (215) 230-4474; www.murrinc.com.

Low-Voltage Supervisor IC Monitors Power Supplies As Low As 1.5 V
The MIC2775 low-voltage supervisor IC features a variety of factory-programmed voltage options and ultra-low quiescent current. Available in the company's IttyBitty SOT23-5 packaging, this device monitors supplies as low as 1.5 V.

The device's pinout makes it a drop-in upgrade for previous generations of supervisor ICs. The quiescent power-supply current is 3.5 µA. Both an active-high and an active-low reset output are featured. A manual reset input is provided as a reset switch or for daisy-chaining onto existing power supervision circuitry. The operational voltage range is 1.5 to 5.5 V. In 1000-unit quantities, the MIC2775 costs $0.78 each.

Micrel Inc., 1849 Fortune Dr., San Jose, CA 95131; (408) 944-0800; fax (408) 944-0970; www.micrel.com.

TAGS: Components
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