End equipment users, from servers to base stations, are becoming more concerned about efficiency and power loss, and their impact on annual operating costs. This means that designers must improve efficiency throughout the power conversion process. This slide shows TI’s complete telecomm power solution from the AC plug to the point of load. As can be seen, TI’s telecomm power solution consists of three main stages: the AC/DC power conversion with power factor correction stage, the isolated step-down DC/DC conversion stage, and the non-isolated point of load DC/DC conversion stage. The UCC28070 2-phase interleaved PFC controller takes the AC input from the plug and converts it to a high voltage DC output upwards of 1 kW while implementing power factor correction. The UCC2897A current mode active clamp controller takes the UCC28070 boosted DC output as its input and converters it to a lower system bus voltage used by the point of load converters. For higher output power, the LM5035 half bridge controller offers high power density by integrating a 105 V start-up regulator, and 105 V, 2 A half-bridge gate drivers. The LM5039 adds to the LM5035 benefits by offering peak cycle by cycle current limit to protect the power converter in a transient overload, and average current limit to balance the half-bridge capacitor divider during extended overloads.