Gate Driver - How to incorporate bootstrap circuitry?

I am attempting to use two of the Gate Driver symbol in Simscape to model my selected half-bridge driver. I am using two Gate Driver symbols because it appears the Half-Bridge Driver symbol only accepts one input; in my system, there will be two discrete inputs to the driver.

I do not see from the connections available on the Gate Driver symbol how I would implement bootstrap circuitry to properly bias the upper MOSFET in my half-bridge.

Bootstrap circuitry referring to the highlighted elements shown below:

Thanks!

-M

Answer 1

[Rodney Tan]

Hi May, I have create a IR2110 high side drive bootstrap circuit in Simulink model and shared in file exchange. You can have a look and let me know if it answer your question.

https://www.mathworks.com/matlabcentral/fileexchange/179564-ir2110-high-side-drive-bootstrap-circuit-demo

[May]

Thanks so much, Rodney! Unfortunately my company utilizes an older version of MATLAB (2021a) and I am unable to open your file (2023a). I know it's a lot to ask, but is there any way you would be able to generate a backwards-compatible model?

[Rodney Tan]

Hi May, you may use Simulink online to open Simulink model save in 2023a and save As or export at 2021a version.

Second method you can set Simulink preference as shown in the link below

https://www.mathworks.com/matlabcentral/answers/94724-how-can-i-open-my-current-simulink-models-in-previous-versions-of-simulink

Third way, I can only save the Simulink model in an old .mdl format and attached here for your reference. Hope it works for you.

[May]

I was able to open the model in Simulink online. Thanks so much, Rodney!

Answer 2

[Vinay]

Hi @May,

The Gate driver input port offers two modeling options for controlling the output state. The PS input allows a single external signal to control the driver output. In contrast, the electrical input port accommodates two electrical input connections, PWM and REF, to drive the output.

In the model the upper MOSFET gate and source are driven by signals 'HO' and '' .The gate driver with electrical input can be used to connect the above signals to the MOSFET as shown below

Hope this will resolve the query!

[May]

Thank you for your response but this did not resolve my question on how to implement bootstrap circuitry with the Gate Driver symbol.