Gate Drive Transformer Design

12 steps for designing gate drive transformers february 22 2019 august 11 2020 bhuvana madhaiyan sampath palaniappan gate drivers power supply smps switched mode following these 12 steps when designing gate drive transformers will ensure a long component life and optimal performance.

Gate drive transformer design.

Coilcraft has pre designed off the shelf gate drive transformers in a range of volt time product ratings isolation ratings and turns ratios. How do i select the best coilcraft gate drive transformer for my application. For more information see the overview for mosfet and igbt gate drivers product page. In order to design a good gate drive transformer several things must be necessary.

High isolation transformer manufacturing design. The final design would be greatly simplified if he could meet the requirements using single turn windings. Based on a single turn he calculated the core area needed and then went looking for a core. Two of the critical components to control when designing a gate drive transformer are the leakage inductance and distributed capacitance.

Some of the common core packages are ee eer etd and efd. Assum ing optimal values for rise time droop and overshoot the application is what discriminates the gate drive transformer from other transformers. Some common schematics and their corresponding turns ratios are listed in fig. Coilcraft s off the shelf gate drive transformers simplify the design of your gate drive circuit and shorten design cycle.

A special section deals with the gate drive requirements of the mosfets in synchronous rectifier applications. Several important factors need to be considered when designing an optimized gate drive transformer gdt. The basic gate drive transformer has several design varia. All of our gate drive transformer products are rohs compliant and come in multiple winding configurations.

The basic gate drive transformer has several design variations each of which is determined by the specific application. Gate drive transformers typically provide worse rise and fall times than other drivers but due to the resonant nature of the tesla coil this is less important than in other applications. Typical gate drive transformers are designed using ferrite cores to reduce cost. Our surface mount smt gate drive transformers feature basic and functional insulation and are available in various package sizes.

A gate drive transformer isolates the controlling gate drive circuit from the switch node when driving the mosfet gate and may also scale the output voltage via an appropriate primary to secondary turns ratio. The leakage inductance must be low. This article discusses several gdt design considerations as well as ideal applications for their use. Gate drive transformers are essentially pulse transformers that are used to drive the gate of an electronic switching device.