UCC5320: UCC5320

Abraham Choucair

Intellectual 530 points

Part Number: UCC5320
Other Parts Discussed in Thread: UCC27511A

FOR ucc5320

WHAT HAPPEND IF WE TIED GND2 and VEE2 TOGETHER..............

over 5 years ago

0 John Geiger over 5 years ago

TI__Expert 3355 points

Hi Abraham,

I work on the applications team in the high power drivers group and can help you with your question.

Can you tell me more about your circuit? Why do you need to tie GND2 and VEE2 together? Why are you looking at UCC5320 over a single channel low side driver, such as UCC27511A?

The device can still operate normally with GND2 and VEE2 tied together. You just lose the basic/reinforced isolation between the two sides if these are shorted.

If this answered your question, could you please press the green button?

Thanks,
John

0 Abraham Choucair over 5 years ago in reply to John Geiger

Intellectual 530 points

Hi John. Our application to drive ignition dual coil. UCC5320E will be used to drive IGBT and do isolation.. schematic is attached. our design to drive dual ignition coil

0 John Geiger over 5 years ago in reply to Abraham Choucair

TI__Expert 3355 points

Hi Abraham,

I apologize, I misread your question initially.

If using UCC5320E, you can tie VEE2 and GND2 together and the device will function normally. This pin is mainly used to prevent under-driving your switch when using split supplies to attain positive turn on and negative turn off.

You will still keep isolation in this case.

I can't see the schematic in your post. Can you please try to attach it again, or attach it as a pdf?

If this helped answer your question, could you please press the green button?

Thanks,
John

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UCC5320: UCC5320