UCC25600-DESIGN-CALC: Overcurrent Pin design calculation

Shashank Varshney

Part Number: UCC25600-DESIGN-CALC
Other Parts Discussed in Thread: UCC25600

I am reading the UCC25600 datasheet. And I came across the designing of parameters for Overcurrent pin. I am really not getting how to design the values for resistor and capacitor which are required for voltage sensing across the resonant capacitor.

Please tell what is P_Rs in Rs resistor calculation.

Also if there is any document regarding this kind of overcurrent protection, please share.

3 months ago

+1 Manikanta Pallantla 3 months ago

TI__Genius 13245 points

Hi Shashank,

We don't have any additional documents to explain this circuit. You can run TINA simulation (https://www.ti.com/lit/tsc/slum425 ) to understand how the circuit works. Let me know if you have any further questions.

P_Rs is the power dissipation across Rs resistance value. Please use the design calculator for finding these component values.

Regards

Manikanta P

0 Shashank Varshney 3 months ago in reply to Manikanta Pallantla

Prodigy 40 points

In TINA TI simulation file, value of current sensing components as mentioned above, are different from the values mentioned in the design calculator. Please provide the reference from where the circuit is taken.

0 Manikanta Pallantla 3 months ago in reply to Shashank Varshney

TI__Genius 13245 points

Hi Shashank,

Its a very old device. So, I don't have any references of the circuit to provide.

Regards

Manikanta P

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UCC25600-DESIGN-CALC: Overcurrent Pin design calculation