UCC27536 application

Jamie Maxwell

Other Parts Discussed in Thread: UCC27536

I’m wondering if I can use a gate driver (Texas Instruments, UCC27536) to convert logic level data to 27 Volt logic level data? There’s some capacitance I need to drive (100nF) but I believe I should be able to get pretty good risetimes (better then 1usec). Also, if I need to charge a battery can the same driver handle continuous currents of ~ 1 Amp?

over 7 years ago

0 Brian Johnson96 over 7 years ago

TI__Expert 3200 points

Let us get the best AE involved to help you out.

0 Wei Zhang over 7 years ago

TI__Intellectual 2061 points

Thanks, Brian.

The UCC27536 can be used for a logic conversion from a low voltage input to a 27V logic data.

- My question is how high the switching frequency will be for during a 100nF cap (this is considered to be heavy load)

No, the driver cannot handle that big current, the major consideration is thermal, due to the internal pull up and pull down resistance.

Please feel free to let me know if you have further questions.

Wei

0 Jamie Maxwell over 7 years ago in reply to Wei Zhang

Expert 1530 points

Wei Zhang said:

- My question is how high the switching frequency will be for during a 100nF cap (this is considered to be heavy load)

The goal is to transfer 115kbps, but 9600 would still be acceptable.

0 Wei Zhang over 7 years ago in reply to Jamie Maxwell

TI__Intellectual 2061 points

Thanks, Do you mean the frequency will be 115kHz? Could you please confirm? Thanks.

Wei

0 Jamie Maxwell over 7 years ago in reply to Wei Zhang

Expert 1530 points

Wei Zhang said:

Thanks, Do you mean the frequency will be 115kHz? Could you please confirm? Thanks.

Wei

Yes, that is the desired frequency, but a lower rate would be acceptable. Would like to use highest rate possible.

Thanks

0 Wei Zhang over 7 years ago in reply to Jamie Maxwell

TI__Intellectual 2061 points

Do you have a schematic that shows the gate drive resistance, which connects the output of the driver to the 100nF load? if the resistance is zero. the estimated power will be around Ploss=C*V^2*115k=100n*27V^2*115k=~8W. This does exceed the power maximum rating.

Wei

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UCC27536 application