UCC28070A: GDA and GDB output signal

CCphi CCsora

Part Number: UCC28070A

Dear Sir,

I am testing UCC28070A base on ref. design TI 5KW Interleaved (PMP4311). We testing of step by step.

Firstly, If we supply DC 13V into pin VCC, will it have output signal at GDA and GDB pin ? What is the correct output waveform at GDA and GDB pin ?

Best Regards,

CCphi

over 6 years ago

0 John Griffin1 over 6 years ago

TI__Mastermind 34465 points

Hi CCphi,

In order to get the GDA,GDB output pulses you will need to raise VSENSE above the PFC enable threshold (0.75V) and also raise VINAC above the zero crossing detection threshold (0.7V)
Then you can check for gate drive signals

Regards

John

0 John Griffin1 over 6 years ago in reply to John Griffin1

TI__Mastermind 34465 points

Hi CCphi,

Since you have no more questions I will mark this post as resolved

Regards

John

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UCC28070A: GDA and GDB output signal