SLUSF13 august 2023 UCC15240-Q1
PRODUCTION DATA
The maximum power handling capability is determined by both circuit operation and thermal condition. For a given output voltage, the maximum power increases with input voltage before triggering the thermal protection. An over-power-protection (OPP) is implemented to limit maximum output power and reduces power stage RMS current at high input voltage. The OPP is implemented by a feed-forward control from the input voltage to the OPP burst duty cycle (DOPP). The DOPP adds a "baby" burst within the on-time of "Mama" burst from the main feedback loop for the (VDD-VEE) regulation. When the input voltage increases, the DOPP reduces automatically to limit the averaged output power.
At high ambient temperature, the thermal performance determines the maximum power and safe operating area (SOA). A protective thermal shut-down is triggered after overtemperature is detected. The high-efficiency and optimized thermal design for transformer and silicon provide a high power handling capability at high ambient temperature in a small package.