DC-DC converter powers gate drives

July 28, 2016 //By Nick Flaherty
Murata has launched a series of 1 W DC-DC converters for driving high and low-side gate circuits such as those using IGBTs and SiC MOSFETs.

The MGJ1 series is manufactured by Murata Power Solutions and provides isolation up to 5.2 kV DC with nominal output voltage combinations of +15 / -5, +15 / -9 or +19 / -5 VDC. The series also offers a choice of +5, +12 or +24 VDC input.

The MGJ1 series is characterized for high dV/dt immunity to provide reliable and continued operation in fast switching circuits, and partial discharge performance that contributes to a long service life. The low input-to-output coupling capacitance, typically 5 pF, also helps reduce EMI effects.

The series suits a broad range of medical applications for which certification to ANSI/AAMI ES60601-1 to 2 MOOPs is pending. The converter also conforms to the UL 60950 (pending) for reinforced insulation and by incorporating a 9.3 mm creepage and clearance space helps safety agency approvals for high working voltage applications.

“The MGJ1 provides optimized voltages for powering gate drives for best system performance and efficiency. It also has high isolation and a characterized partial discharge performance and dV/dt immunity,” said Ann-Marie Bayliss, product manager at Murata Power Solutions.