UCC28019A: UCC28019A EVM + LMG3410 EVM test

Frank(EP) Liu

Part Number: UCC28019A
Other Parts Discussed in Thread: LMG34XX-BB-EVM, LMG3410EVM-018, , ISO7731, LMG3410EVM-031

hi,

Customer try to use UCC28019A EVM + LMG3410EVM-018 + LMG34XX-BB-EVM to test GAN.

do you have suggestion how to connect these evm?

BR,

frank

over 3 years ago

0 David Huang33 over 3 years ago

TI__Genius 9140 points

Hello,

since LMG3410EVM-018 + LMG34XX-BB-EVM is for half bridge topology.

in order to evaluate the GaN device on UCC28019A evm, I would suggest to follow below steps.

1. You can LMG34XX-BB-EVM to generate 5V for supply of ISO7731

2.use the LMG3410EVM-018 for the low side GaN device supply.

3.Suggest to disconnect INA of U3 in the LMG3410EVM-018

4. since the input range of ISO7731 should be below VCC, please add zener diode（4.7V） between UCC28019A and the ISO7731.

0 Frank(EP) Liu over 3 years ago in reply to David Huang33

TI__Expert 4165 points

hi David,

sorry, a typo. the GaN evm is LMG3410EVM-031.

but I think that your suggestion is still the same, right?

-follow your suggestion to modify the board.

-plug the LMG3410EVM-031 to LMG34XX-BB-EVM

-provide 12V to J6 on LMG34XX-BB-EVM

-bout item 4, just connect gate pin from UCC28019A to J3 of LMG34XX-BB-EVM, right?

how to connect power from the UCC28019A EVM to LMG34XX-BB-EVM?

BR,

frank

0 David Huang33 over 3 years ago in reply to Frank(EP) Liu

TI__Genius 9140 points

hello Frank,

when you change to 031EVM, item 3 of my suggestion can be removed.

you should connect UCC20819A +4.7v Clamped diode (my item 4 suggestion), and please make sure the ground trace also connect from LMG34XX-BB-EVM and UCC28019A EVM.

you can use Q2 PIN 27(VDD) for the UCC28019A EVM supply.

0 Frank(EP) Liu over 3 years ago in reply to David Huang33

TI__Expert 4165 points

David,

Let me summary the modification.

1. plug the LMG3410EVM-031 to LMG34XX-BB-EVM

2. connect UCC20819A pin 8 +4.7v Clamped diode to J1 pin5 in LMG3410EVM-031 and please make sure the ground trace also connect from LMG34XX-BB-EVM and UCC28019A EVM.

3. share the same 12V with UCC28019A EVM supply.

4. connect the drain and source side from LMG3410EVM-031 to UCC20819A EVM.

is my understanding correct?

BR,

frank

0 David Huang33 over 3 years ago in reply to Frank(EP) Liu

TI__Genius 9140 points

Hi Frank,

yes.

0 Frank(EP) Liu over 3 years ago in reply to David Huang33

TI__Expert 4165 points

Hi David,

after all jump wire.

it works at the test condition below.

-vin: 115

-Vo:391V

-Io:0.1A

But the UCC28019A would stop when loading increases

CH1: IN_L (the voltage high is 12V, not 200mV)

CH2: Source

below one is the measurement for IN_L with correct voltage.

Any idea where it's wrong?

BR,

frank

0 David Huang33 over 3 years ago in reply to Frank(EP) Liu

TI__Genius 9140 points

hello Frank,

can you please check whether the controller triggers ocp protection on Isense pin? because the GaN is much fast than Si Mosfet, I am a little worry about the noise on Isense pin.

other suggestion here is try to reduce the GaN speed on the pin 30 of the GaN.

thanks.

0 Frank(EP) Liu over 3 years ago in reply to David Huang33

TI__Expert 4165 points

David,

Customer removes the LMG3410EVM-031. They found the UCC28019A evm already has issue. Maybe the UCC28019A is damaged.

I will apply the UCC28019A sample to replace the one on EVM.

Thanks.

BR,

frank

0 David Huang33 over 3 years ago in reply to Frank(EP) Liu

TI__Genius 9140 points

ok, thanks for the feedback.

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UCC28019A: UCC28019A EVM + LMG3410 EVM test