Gate Drive Transformer Design Guide

Several step by step numerical design examples complement the paper.

Gate drive transformer design guide. A gate drive transformer is needed in a smps to control the timing of the circuit. The basic gate drive transformer has several design varia. A special section deals with the gate drive requirements of the mosfets in synchronous rectifier applications. A guide to gate drive transformers.

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 transformers are used to modify the voltage level to a gate. Precise engineering is essential at every stage of designing a circuit and it is equally important in the design of the components. Based on a single turn he calculated the core area needed and then went looking for a core.

Our designs typically utilize high permeability ferrite cores to maximize. The lph8045 series is a coupled inductor transformer that can be wired as a gate drive transorme r. A special chapter deals with the gate drive requirements of the mosfets in synchronous rectifier applications. The final design would be greatly simplified if he could meet the requirements using single turn windings.

For more information see the overview for mosfet and igbt gate drivers product page. Two of the critical components to control when designing a gate drive transformer are the leakage inductance and distributed capacitance. 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. Coilcraft s off the shelf gate drive transformers simplify the design of your gate drive circuit and shorten design cycle time.

One component that must be carefully designed is the gate drive transformer in a switch mode power supply smps. 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 essentially pulse transformers that are used to drive the gate of an electronic switching device. They also provide impedance matching and voltage isolation.

Several important factors need to be considered when designing an optimized gate drive transformer gdt. Coilcraft s off the shelf gate drive transformers simplify the design of your gate drive circuit and shorten design cycle time. Procedure for ground referenced and high side gate drive circuits ac coupled and transformer isolated solutions are described in great details. Gate drive transformers gts are a key component in many modern electronic systems.