UCC28019: What's the UCC28019's control mode?

POKAI HSU

Prodigy 65 points

Part Number: UCC28019
Other Parts Discussed in Thread: UCC28180

Hello,

I don't know why TI employee answered UCC28019 is based on ONE-CYCLE CONTROL method,

https://e2e.ti.com/support/power_management/isolated_controllers/f/188/t/289108

According to UCC28019 datasheet,it operating in average current mode is achieved without line sensing,

just like Infineon's ICE2PCS02.

And OCC Control IC operating frequency could be set by external resistor.

Anyone could help me to check the UCC28019's control mode?

Thanks.

over 8 years ago

0 John Griffin1 over 8 years ago

TI__Mastermind 34465 points

UCC28019 PFC Operation.pdfHi,

I'm not sure what your question here is. The UCC28019 uses a PWM ramp slope proportional to VCOMP and a current error amplifier output VIERR proportional to the average inductor current. That is the control method. I am attaching a pdf that describes this method of operation.

The UCC28019 has a fixed 65kHz operating frequency.
If you want a variable operating frequency please consider the UCC28180.

Regards,

John Griffin

0 POKAI HSU over 8 years ago in reply to John Griffin1

Prodigy 65 points

Hi John Griffin,
I just want to check it's control method.
Thank you for the technical document you attached.

Power management

Power management forum

UCC28019: What's the UCC28019's control mode?