DC-DC converters with high isolation provide gate drive in industrial installations
This converter series is designed for powering 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. Rated at 6W, the dual output converters provide a 2:1 input voltage range with nominal values of 5, 12 and 24V, 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.
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. 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 offer an operating temperature range of -40 to 105C, with derating above 90C. 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.
Murata Europe; www.murata.com