UCC256404: UCC256404:

Hi Sam,

You can use same values as the EVM: 1.65k of three in series.

Regards

Manikanta P

Hi Sam,

As I mentioned in my previous thread,1.65k of three resistors (total 5k) should work for universal AC input voltage input (85-265V RMS).

Regards

Manikanta P

Hi Sam,

Output OVP will be triggered for both positive and negative voltages at the bias winding. The threshold values are +/- 4V.

Please use the design calculator for finding the resistor values at the bias winding.

Regards

Manikanta P

Hi Sam,

Yes, you should add the capacitance similar to the schematic. This will help reduce the common mode noise.

Regards

Manikanta P

Hi Sam,

OCP set will be changed by the resistor value at the ISNS pin. So, you can use the design calculator for tuning this value.

Sam Abeysekera said:

2. On Design calculator 1st page with schematic shows Rll upper=549K, and lower Rll316K? divider voltage=4.32V

3. Schematic shows R25=213K and R32=120K? Divider Voltage =4.32V? OCP set for 16A

BW pin resistors are determined based on the desired OVP threshold and the burst mode thresholds ratio option.

So, please use the design calculator for finding these values. 

Regards

Manikanta P