UCC2580-3: substitute

We recommend UCC2897. What is the topology?

Thank you. It is used as a PWM controller in a switch-mode power supply.

understood. what is the topology of the SMPS?

What do you mean by 'topology.' It is used as the PWM controller. Here is page 2 of the schematic. It is U7. This one is defective. No output on pin 4 and 6. 

115VAC Pwr Supply PG2.pdf

BTW, TI's website does not a have a datasheet for the UCC2897. The search results end up with a datasheet for the UCC2891 through UCC2894. 

Here is the link for the part: https://www.ti.com/product/UCC2897A

Topology means like LLC, forward, PSFB, etc. Because it is a PWM controller, you can configure it differently. UCC2897A is a active clamp forward controller so if UCC2580-3 is used in other topologies, we may recommend different replacement part.

The schematic is not complete. Please provide the power stage schematic.

Here is all 4 pages of the schematic

115VAC Pwr Supply schematic.pdf. Let me know if there is an available substitute. 

Thanks

Hi,

The best substitutes are UCC2897A if peak current mode control is ok, if you want to have voltage mode, then LM5025.

The UCC2580-3 is a SOIC-16. I found the UCC2897A data sheet. This is a 20 pin TSSOP. This won't work. I need an IC that can directly replace this UCC2580-3.