Gate Drive Transformer Design

In order to design a good gate drive transformer several things must be necessary.

Gate drive transformer design. 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. Coilcraft s off the shelf gate drive transformers simplify the design of your gate drive circuit and shorten design cycle. Our surface mount smt gate drive transformers feature basic and functional insulation and are available in various package sizes. All of our gate drive transformer products are rohs compliant and come in multiple winding configurations.

How do i select the best coilcraft gate drive transformer for my application. Gate drive transformers are essentially pulse transformers that are used to drive the gate of an electronic switching device. The final design would be greatly simplified if he could meet the requirements using single turn windings. Several important factors need to be considered when designing an optimized gate drive transformer gdt.

Procedure for ground referenced and high side gate drive circuits ac coupled and transformer isolated solutions are described in great details. This article discusses several gdt design considerations as well as ideal applications for their use. The basic gate drive transformer has several design varia. Two of the critical components to control when designing a gate drive transformer are the leakage inductance and distributed capacitance.

Gate drive transformers gts are a key component in many modern electronic systems. Some of the common core packages are ee eer etd and efd. For more information see the overview for mosfet and igbt gate drivers product page. 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. The leakage inductance must be low. The basic gate drive transformer has several design variations each of which is determined by the specific application. High isolation transformer manufacturing design.

Based on a single turn he calculated the core area needed and then went looking for a core. Typical gate drive transformers are designed using ferrite cores to reduce cost. 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. A special section deals with the gate drive requirements of the mosfets in synchronous rectifier applications.