Gate Drive Transformer Design Guide

Precise engineering is essential at every stage of designing a circuit and it is equally important in the design of the components.

Gate drive transformer design guide. Gate drive transformers gts are a key component in many modern electronic systems. This article discusses several gdt design considerations as well as ideal applications for their use. Our designs typically utilize high permeability ferrite cores to maximize. They also provide impedance matching and voltage isolation.

A special chapter deals with the gate drive requirements of the mosfets in synchronous rectifier applications. The basic gate drive transformer has several design varia. Coilcraft s off the shelf gate drive transformers simplify the design of your gate drive circuit and shorten design cycle time. 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.

The lph8045 series is a coupled inductor transformer that can be wired as a gate drive transorme r. Most gate drive transformers are used with high speed switching devices such as field effect transistor fet and insulated gate bipolar transistor igbt electronics. Gate drive transformers are used to modify the voltage level to a gate. Based on a single turn he calculated the core area needed and then went looking for a core.

Design procedure for ground referenced and high side gate drive circuits ac coupled and transformer isolated solutions are described in great details. One component that must be carefully designed is the gate drive transformer in a switch mode power supply smps. A gate drive transformer is needed in a smps to control the timing of the circuit. 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.

Two of the critical components to control when designing a gate drive transformer are the leakage inductance and distributed capacitance. Assum ing optimal values for rise time droop and overshoot the application is what discriminates the gate drive transformer from other transformers. Coilcraft s off the shelf gate drive transformers simplify the design of your gate drive circuit and shorten design cycle time. 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.