Based on real repair logs for this 35W series:
On many compact 35W power ICs (think: USB-C chargers, LED drivers, or buck converters), laser etching is notoriously hard to read. Under a microscope, IPKBL SR could easily be: ipkblsr 35w schematic
If the board is beyond repair, you can find genuine replacements through various retailers: Based on real repair logs for this 35W
At first glance, "ipkblsr" does not correspond to a major consumer electronics manufacturer (e.g., Samsung, Delta, Mean Well). The structure suggests one of three possibilities: or buck converters)
Providing a stable 35W output for DIY projects. Understanding the 4 Stages of the Schematic