Murata has introduced a series of high isolation DC/DC converters for industrial power installations. Typical applications include motor drives/motion control, solar inverters, UPS, alternative energy (wind-power generators), high-power AC-DC conversion, traction, EV/HEV and welding.
The MGJ6 series converters are designed to power high- and low-side gate-drive circuits for IGBTs and silicon and silicon carbide MOSFETs in bridge circuits used in motor control applications and industrial power installations.
The MGJ6 wide, low-profile series converters feature a 14 mm creepage and clearance distance for use in reinforced-rated isolated-gate drive-power applications in higher efficiency 690 VAC industrial electrical distribution systems. They provide optimised voltages for best system performance and efficiency, contends the firm.
Rated at 6 W, the dual output converters provide a wide 2:1 input voltage range with nominal values of 5, 12 and 24 V, and with output voltages of 15/-10 V, 20/-5 V and 15/-5 V.
Suitable for power applications that require a DC link voltage up to 3 kVDC, asymmetric outputs provide an optimum drive level to maintain a high system efficiency with low EMI levels.
With their frequency synchronisation-capability and very low coupling capacitance, typically 13 pF, EMC compliance is easier
In addition, the firm stated that the converters’ compact design reduces board space and development time, whilst their characterised dV/dt immunity of 80 kV/microsecond gives users confidence in a long service life, and similarly the use of planar magnetics increases product reliability and repeatability of performance.
Operating temperature range is -40 to 105 °C, with derating above 90 °C.
Standard features of the patent protected converters include enable pin, short-circuit and overload protection, and a frequency synchronisation pin that simplifies EMC filter design.
The series is pending IEC 61800-5-1 approval based on a high working voltage of 690 Vrms maximum between primary and secondary, and similarly is also pending UL approval to UL 60950 for reinforced insulation to a working voltage of 690 Vrms.
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