Electronic Design


Low-Profile, High Power Density AC-DC Power Supplies Save Space
The UL300 Series offers low-cost, low-profile, high power density ac-dc power supplies. These devices suit rack-mounted network, telecom, and industrial system applications.

These power supplies provide 300 W in an industry-standard U-bracket package measuring 4.3 by 8 by 2 in. The rating is greater than 4.36 W/in3. The series consists of 14 models with single-, dual-, triple-, or quad-output voltages. Autoranging enables input voltages of 90 to 132 V ac and 170 to 264 V ac without the need to configure the supply with jumpers, switches, or straps. Output-voltage selections include 3.3, 5, 12, 15, 24, and 48 V dc. Quad-output standard configurations include ±5/±12 V, 5/24 V/±12 V, and ±5/±15 V. Allowing output flexibility, the main output-voltage trim ranges by 10%. A floating output enables the user to swap polarity easily.

To comply with safety agency requirements, input to output isolation is greater than 3000 V ac. The devices comply with UL, CUL, and TUV requirements and EMI is limited per FCC and CISPR requirements. Design-in is eased by connections for a power-good indicator, fan power, and remote on/off. Voltage accuracy is better than 1% at full load for sensitive surface-mount components. Reliability is enhanced by fully loaded 100% burn-in. The system is protected in harsh environments by overvoltage, short circuit, overcurrent, and overtemperature schemes.

In OEM quantities, pricing for the UL300 Series ranges from the low $60s for single outputs to the low $70s for quad outputs.

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

400-W Power Supply Suits Both PC And Industrial Applications
The AXT 400-W SmartPower PP403X runs 80% cooler and 40% quieter than standard power supplies. This device suits both PC and industrial applications.

This six-output fan-cooled ATX is compatible with the most recent processing technology that requires 3.3-V output, 5-V AV ac-on standby, and logic on/off control. It is ATX 2.03-compliant and offers approvals from FCC class B/UL/CE/TUV. Available now, the PP403X costs $99.

Antec Inc., 47900 Fremont Blvd.,Fremont, CA 94538; (510) 770-1200; fax (510) 770-1288; www.antec-inc.com.

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