JAJSOG3 December 2023 UCC28750
PRODUCTION DATA
When the UCC28750's VDD pin voltage reaches the turn-on threshold, the device enters into the startup state and begins to deliver power to the output. In this state the internal control voltage is clamped to a fixed ramp, enabling a controlled rise in the output voltage while lowering current stresses on the switching devices. After the soft start ramp is finished rising, or the FB pin voltage falls below the soft start ramp, is the startup state finished. All of the fault features are still enabled during this time, and can cause the device to enter into a fault state.