ZHCS779C March 2012 – July 2025 UCC28070 , UCC28070A
PRODUCTION DATA
An additional feature designed into the UCC28070A is the Start-Up Hold Off logic that prevents the device from initiating a soft-start cycle until the VAO pin is below the zero-power threshold (0.75V). This feature ensures that the SS cycle initiates from zero-power and zero duty-cycle while preventing the potential for any significant inrush currents due to stored charge in the VAO compensation network.