40W DC/DC converter guarantees lifetime quality for IoT and comms

Packaged in an industry standard 1.0 x 1.0-inch (25.4 x 25.4mm), six sided, shielded metallic case, the MGF40 40W DC/DC converter has been designed by Cosel to provide a failure rate of below 30 ppm. To guarantee lifetime quality, the MGF40 does not include aluminum or tantalum capacitors, says Cosel and is covered by a warranty period of 10 years.

The MGF40 series is available in three input voltages, 4.5 to 13V, 9.0 to 36V and 18 to 76V. A single output version, MGFS40, is available in four output voltages, 3.3, 5.0, 12, and 15V, and can be adjusted within a range of +/- 10 per cent using a resistor bridge or potentiometer. A dual output model, MGFW40, is available in two, factory trimmed, output voltages, +/- 12V and +/- 15V to provide 24V and 30V, respectively, between the two ends.

In the event of low line input levels, the 4.5 to 13V MGFS and MGFW 4005 versions have output power limited to 30W. Synchronous rectification ensures that efficiency is up to 88 per cent (typical). The 9.0 to 36V MGFS and MGFW 4024 and the 18 to 76V MGFS and MGFW 4048 deliver up to 42W with an efficiency of up to 92 per cent (typical).

Designed to power demanding applications, the MGF40 series features a wide operating temperature range of -40 to +85 degrees C with a maximum case of +105 degree C for the 4.5 to 13V input and +110 degrees C for the 9.0 to 36V, and 18 to 76V units.

The MGF40 includes over-current and over-voltage protection. To protect against over-heating, thermal protection switches the unit off when the maximum allowable safe temperature is reached.

Negative logic is provided as standard, the unit is on when the RC pin is at a low level and off when it is at a high. The MGF40 can be ordered with positive logic, option-R. A control pin allows the user to turn the unit on/off remotely. For applications requiring lower leakage current or no Y-capacitor connected between the input and the output, an option-G is available.

Calculated in accordance with the Telcordia reliability prediction procedure Issue 4 of SR-332, at 100 per cent load and at +25 degrees C ambient temperature, the MGF40 series has a mean time between failure of 3,153,843 hours, and 675,688 hours at +60 degrees C ambient. Calculations are at ground fixed, controlled (GB).

The MGF40 series has been tested to sustain rough conditions and has passed three-axis vibration testing equivalent to 10G and shock testing of 50G.

It is housed in a metallic, six-sided, shielded case with high attenuation input filter, and is claimed to offer EMI performance with figures being far below the EN55032:2012 Class A in conduction and radiated emission at three metres.


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