ZHCSNM5C november 2020 – august 2023 UCC25800-Q1
PRODUCTION DATA
UCC25800-Q1 is an 8-pin open-loop half-bridge transformer driver that integrates all the control and power devices. It converts a fixed input voltage to an isolated voltage source through an isolation transformer. The relationship between the output voltage and input voltage is fixed, which is determined by the transformer turns-ratio and the rectification method. The open-loop control, together with the LLC resonant converter operation, makes the solution more robust, smaller size, higher efficiency, as well as lower EMI and common mode noise. The transformer driver requires a minimum of external components while providing design flexibility and robust protection features. The 1.2-MHz maximum switching frequency reduces the transformer size and cost, making it easier to pass the shock and vibration test in the automotive applications. The fault code output allows the designer to identify the protection mode, during the development stage, as well as during normal operation. This makes the development process much easier. It also enables the system controller to make intelligent decisions when bias supply faults happen.