UCC12050: Constant Power limit value

Hi Kuramochi,

From your E2E question regarding UCC12050 output power specification, you determine the maximum allowable output power from VINP, VISO and operating temperature. This will give a maximum output current for a given VISO set voltage which will define the "Recommended Operating Area" in Figure 27 below:

For example, if the maximum output current is determined to be 100 mA, as the load slowly commands (soft overload) greater than 100 mA, the VISO voltage begins to decrease (region 1). While operating in power limit, Region 1, if the overload causes VSIO to fall below 3.8V, the output stage of the UCC12050 switches from "Active Rectification" to "Passive Rectification." If the load is decreased before VISO falls to the "Reset Threshold" (1.8 V), the VSIO voltage will increase and when it increases above 4.3 V, the output stage returns to "Active Rectification." These details are explained in section 7.3.3 in the UCC12050 data sheet.

Thanks for connecting through E2E.

Regards,

Steve M