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VOLUME -22 NUMBER 8
Publication Date: 08/1/2007
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August 2007 Issue
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Ultra-Wide Input for New Calex Converters
Concord, CA — Calex Mfg. Co., Inc. has introduced its 150 Watt HEW Series DC/DC converters. The new converters have an ultra-wide 4:1 input range to accommodate 12, 24, and 48VDC nominal input voltage requirements. Modules are available with either a 9 to 36VDC input range or an 18 to 75VDC input range. Output voltages available are 3.3, 5, 12, 15, and 24VDC.
The 150 Watt HEW is housed in an industry standard half brick case measuring 2.3 x 2.4 x 0.55-in. The module is fully encapsulated with a thermally conductive potting compound for superior thermal performance in a still air or limited airflow environment. The unit also has an aluminum baseplate to allow easy attachment of a heatsink or mounting of the module against an enclosure to further improve the thermal performance of the device.
The company offers a variety of bolt-on heatsink options for the HEW Series. The HEW is designed for PC board mount applications, however, a mounting kit is available for users requiring screw terminal connections. The case operating temperature range of the HEW module is -40 to +100°C. The storage range is -40 to 120°C. The unit is protected through pulse by pulse current limiting, short circuit frequency foldback, dead short shutdown and thermal shutdown.
All modules in the HEW Series have ON/OFF control, output voltage remote sensing and output voltage trim. The ON/OFF control reduces the input current to 2mA when the module is in the OFF condition. All modules are available with either positive or negative ON/OFF logic.
The output voltage remote sense feature can compensate for up to a 10 percent voltage drop on the leads. This ties into the maximum trim limit for the HEW series of 110 percent. Under remote sensing, line regulation is 0.02 percent typical and load regulation is 0.05 percent typical.
All HEW modules are isolated input to output. The isolation voltage is 700VDC for the 9 to 36V input modules and 1544VDC for the 18 to 75V input modules. All modules are RoHS compliant, and Non-RoHS versions of the product are also available.
For more information, contact: Calex Manufacturing Co., Inc., 2401 Stanwell Drive, Concord, CA 94520
800-542-3355 or 925-687-4411 fax: 925-687-3333 www.calex.com
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