Gate Drive Transformer Design

Two of the critical components to control when designing a gate drive transformer are the leakage inductance and distributed capacitance.

Gate drive transformer design.

A special section deals with the gate drive requirements of the mosfets in synchronous rectifier applications. The basic gate drive transformer has several design varia tions each of which is determined by the specifi c application. Our designs typically utilize high permeability ferrite cores to maximize magnetizing inductance and minimize magnetizing current. This article highlights ice components incorporated gate drive transformers which used to drive the gate of metal oxide field effect transistors mosfets.

The basic gate drive transformer has several design variations each of which is determined by the specific application. Was asked to design a gate drive transformer capable of driving two mosfets at 1mhz with a 15ns pulse width. Gate drive transformer circuit maintains fast turn off time this gate drive transformer gdt circuit allows the drive signal to the mosfet to range from 50 down to 0 while still offering a fast. Typical gate drive transformers are designed using ferrite cores to reduce cost.

Typical gate drive transformers are designed using ferrite cores to reduce cost. The power level is just slightly increased by the power consumption of the driver ic which is relatively small compared to the power loss associated by the total gate charge of the mosfet. For more information see the overview for mosfet and igbt gate drivers product page. Coilcraft s off the shelf gate drive transformers simplify the design of your gate drive circuit and shorten design cycle time.

High leakage inductance and distributed capacitance may cause an undesirable output signal such as phase shift timing error noise or overshoot. This technique is what the onetesla product line uses and is what is typically used on tesla coils due to its simplicity and reliability. The gate drive transformers are designed by using ferrite cores packages such as ee eer etd and efd to reduce cost. Some of the common core packages are ee eer etd and efd.

This article discusses several gdt design considerations as well as ideal applications for their use. The transformer design for this circuit is basically identical to any other gate drive transformer design. In order to design a good gate drive transformer several things must. Procedure for ground referenced and high side gate drive circuits ac coupled and transformer isolated solutions are described in great details.

The customer s existing design was unable to deliver enough power. Some common schematics and their corresponding turns ratios are listed in fig. 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. The pulse transformer design requires safety standards such as ul vde cul.

The gates involved are driven by the output of an isolation transformer. Some common schematics and their corresponding turns ratios are listed in fig.