LMG1025-Q1: Load Capacitance

Art Mecina

Part Number: LMG1025-Q1
Other Parts Discussed in Thread: UCC27511A-Q1, , LMG1020

Hello Guys,

Good day.

Our customer wanted to use a GanFET with an input capacitance of about 1nF. This can be considered as the load capacitance of the Driver. They are asking if LMG1025-Q1 is the better choice for high speed applications to drive 1nF or is it better to use other automotive GanFET drivers like UCC27511A-Q1? Is UCC27511A-Q1 much faster if driving 1nF instead of 1.8nF as specified in its datasheet?

Thanks to confirm!

Art

over 4 years ago

0 Jeffrey Mueller over 4 years ago

TI__Genius 12990 points

Hi Art.

For higher speed applications, a GaN FET and GaN driver like lmg1020 and lmg1025-Q1 should be used. For driving a GaN FET, the GaN driver needs to be small to minimize the gate loop inductance and the driver strength needs to be large for fast turn on and off time. However if your high speed performance (pulse width and rise/fall times) does not need GaN it may not need a fast GaN driver like 1020 and 1025. For example its possible that a 10ns pulse can be achieved with ucc27xxx although the max switching frequency cant go above a few MHz. 1020 and 1025 can both achieve 1ns pulses up to about 60MHz.

Let me know if you have any other questions.

Thanks,

0 Art Mecina over 4 years ago in reply to Jeffrey Mueller

TI__Genius 16575 points

Thank Jeff!

I will let you know for any additional inquiries.

I will close the ticket for now.

Art

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LMG1025-Q1: Load Capacitance