If no one has a definitive answer, you may be able to determine what it is by first looking at ICs with 16 pins then reducing the possibilities by looking at the various supply and input pins to see what's close.
The IRS2092 and the IRS20957 are possibilities with 16 pins. I'm sure that there are others.
The IRS2092 and the IRS20957 are possibilities with 16 pins. I'm sure that there are others.