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VOLUME -26 NUMBER 12
Publication Date: 12/1/2011
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December 2011 Issue
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Chassis-Mount DC/DC Converter from Calex
Chassis-mount DC/DC converter.
Concord, CA — Calex Mfg. Co., Inc. has introduced the QCM Chassis Mount Series of DC/DC converters. The QCM offers up to 75 Watts of output power in a rugged, encapsulated 2.65 x 4.2 x 1.0-in. (67.3 x 106.7 x 25.4mm) package.
The recessed barrier strips on the QCM allow all connections to be made in tight quarters while protecting the barrier strip from physical damage. The design of the QCM allows the unit to be mounted in a variety of orientations plus the addition of a heatsink for extended temperature applications. The QCM is suitable for ruggedized mobile applications as well as backplane or NEMA enclosure mounted process control applications.
The QCM Series offers two input ranges, 18 to 36VDC and 36 to 75VDC. Output voltage options are 3.3, 5, 12, 15 and 24VDC. Output power is 75 Watts.
All models offer ON/OFF to conserve battery power. The idle current in the OFF state is only 6mA. Each model also offers output voltage trim to compensate for voltage drops over long leads. All units provide over-voltage protection, pulse by pulse current limiting, over-temperature protection as well as dead short current limiting.
All models are isolated input-to-output, and the switching frequency is 360kHz. Input ripple rejection is 60dB. Each model provides undervoltage lockout and input reverse voltage protection.
Reflected ripple is 10mA peak-to-peak, load regulation is 0.02 percent typical, and line regulation is 0.01 percent typical. The case operating temperature range of the QCM Series is -40 to +100°C. The thermal impedance of the QCM case is 3.7 C/W.
Contact: Calex Mfg. Co., Inc., 2401 Stanwell Dr., Concord, CA 94520-4841
800-542-3355 or 925-687-4411 fax: 925-687-3333 E-mail: email@example.com Web:
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