UCC28060: Regarding Transition mode PFC IC UCC28060 PFC Inductor

Sachin Khante

Prodigy 50 points

Part Number: UCC28060
Other Parts Discussed in Thread: UCC28065, UCC28064A

Dear TI Team,

We are using the PFC IC UCC28060 (Transition Mode Two Phase Interleaved)

I am bit confused to select the optimized inductor for my application .

I did the Calculation for Inductor using TI datasheet UCC28060 , General Calculation and TI Calculator sluc072b.

Since we are using the Critical Conduction or Transition Mode PFC , as per my understanding we need to use Lmin value. (Please correct if I am wrong)

If we select the Lmax Value then for certain condition Zero cross detection may not detected and one of the Mosfet won’t turn on this leads increase the power dissipation , inductor saturation and System may fail.

Please see below calculation and let me know Which Inductor value is suitable for my application.

Thank you ,

Kind Regards,

Sachin Khante

over 3 years ago

0 Adam E2E over 3 years ago

TI__Intellectual 2430 points

hi Sachin,

if you set the Vo as 230V at calculator , then you can get the same result as app note.

by the way , UCC28065 is the latest two phase CRM PFC , you can consider to use it.

0 Sachin Khante over 3 years ago in reply to Adam E2E

Prodigy 50 points

Hi Adam ,

Thank you for your response .

UCC28064A and UCC28065 is not available in stock that is why we are going for UCC28060.

Actually in both the calculation Output Voltage is same as 240V.

If Vout is 230V then again Duty Cycle may increase and it leads to increase Boost Inductor.

So which Inductor I should consider 197uH or 209uH for my application , so that Transition Mode will be achieved ?

Thank you.

Kind Regards,

Sachin Khante

+1 Adam E2E over 3 years ago in reply to Sachin Khante

TI__Intellectual 2430 points

Hi Sachin,

197uH would be better.

thanks.

0 Sachin Khante over 3 years ago in reply to Adam E2E

Prodigy 50 points

Thank you Adam for your quick reply..

Have a nice day ahead

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UCC28060: Regarding Transition mode PFC IC UCC28060 PFC Inductor