Isolated IGBT gate driver delivers 7A peak drive for noisy power stages
Built to simplify robust IGBT and MOSFET gate drives in high slew rate environments, the Littelfuse IX3407B is a single-channel, capacitively isolated gate driver with separate source and sink outputs, and 2500Vrms isolation.
The IX3407B targets power stages where switching edges, ground shifts, and common-mode transients can disrupt control signals, such as motor drives, industrial power supplies, and switched-mode power supplies.
A core benefit is drive strength combined with layout flexibility. The IX3407B provides 7A peak source and sink capability on separate output pins allowing designers to tune turn-on and turn-off independently using different gate resistors.
The driver supports a wide output-side supply range, VDD from 13V to 35V, which allows traditional 15V gate drive as well as higher bias levels where needed. The input side is powered from VCC, 3.1V to 17V. Both non-inverting and inverting inputs are provided, so designers can implement either polarity using a single control signal by tying the unused input high or low.
The IX3407B includes under-voltage lockout (UVLO) on both the input and output sides. When either supply is insufficient, the outputs are forced to an off state that clamps the power switch gate to the output voltage return, reducing the risk of partial turn-on.
Noise immunity is another highlight. The common-mode transient immunity (CMTI) is 150 kV/µs at 700V, supporting operation in fast-switching inverter and converter stages. Additional protection is provided through short-circuit clamping on the output when the output voltage rises above output supply voltage during severe events, with capability described as 500mA for up to 10µs. The IGBT gate driver is supplied in a wide body small outline integrated circuit (SOIC-WB) with an 8-pin package, and a tape and reel option on IX3407BTR.