Half Brick DC/DC Converters offer efficiencies up to 95.6%.

Press Release Summary:

Utilizing synchronous rectification technology, MXW Series is available with 4:1 input ranges of 9–36 Vdc and 18–75 Vdc. Units deliver output voltages of 12, 24, 28, and 48 Vdc and operate down to no-load condition. Housed in 2.4 x 2.5 x 0.52 in. case, converters feature switching frequency of 200 kHz, output voltage setpoint accuracy of ±1.5%, and isolation voltage of 2,250 Vdc. Line and load regulations are 0.05% and 0.08%. With battery power source conservation in mind, OFF current is 2mA.

Original Press Release:

500 Watt Half Brick with Wide 4:1 Input Range DC/DC Converter

Calex Manufacturing Company of Concord, California announces the introduction of the MXW Half Brick Series of DC/DC Converters. The MXW offers leading edge efficiencies with a 9 to 36VDC and 18 to 75VDC input range. The 9 to 36VDC input models are currently available and the 18 to 75VDC input models will be available in Q2 of this year. Efficiencies for the MXW run as high as 95.6% offering unprecendented power density with a 4:1 input range half brick DC/DC converter. The converters high efficiency and high power density is accomplished through the use of high efficiency synchronous rectification technology, advanced electronic circuit, packaging and thermal design resulting in a high reliability product.

The MXW operates at a fixed frequency and follows conservative component de-rating guidelines. The output voltages available with the MXW are 12, 24 and 28VDC. A 48V output model will be available in Q2 of 2016. All models will operate down to a no-load condition. The switching frequency of the MXW is 200kHz. The output voltage setpoint accuracy is +/-1.5%. Turn-on overshoot is 0%.

The temperature coefficient is 0.015%/ºC typical. Output noise is 1% of Vout peak to peak. Load transient overshoot and recovery time is 3% and 500µs respectively. Line regulation is 0.05% and load regulation is 0.08%. All MXW models feature ON/OFF. With battery power source conservation in mind, the OFF current for the MXW is 2mA. The MXW also offers +/-10% output voltage trim.

All models are isolated input to output. The isolation voltage is 2250VDC. The case temperature operating range for the MXW is -40 to 100ºC. A “-T” version of the MXW is available for operation from -55 to 105ºC. The storage temperature is -55 to 105ºC.

The MXW is protected by over current, short circuit, over voltage and over temperature protection. The MTBF for all models is 5.4M hours. All models are also backed by Calex’s Five Year Warranty. The MXW is designed and manufactured in the USA. The case size of the MXW is 2.4” x 2.5” x 0.52”. Unit weight is 109.2g. All models are designed to meet UL/cUL 60950, IEC/EN 60950-1 and MIL STD 810G. Threaded through holes are provided in the case to allow easy mounting or addition of a heatsink for extended temperature operation.

For more information on the MXW series go to http://www.calex.com/pdf/mxw.pdf or contact Calex at 800-542-3355/925-687-4411 (phone), 925-687-3333 (fax), sales@calex.com.  Calex’s corporate headquarters are located at 2401 Stanwell Drive, Concord, CA 94520 USA.


Paul Cuff


Phone: (925) 687-4411


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