Description

The TIDA-01494 reference design is a compact: high efficiency: 24-V DC: 480-W nominal: 720-W peak output reference design for industrial AC/DC power supplies. The circuit consists of a front-end continuous conduction mode (CCM) power factor correction (PFC) circuit followed by a robust LLC stage with synchronous rectification. The design enables efficiency greater than 93.5% over a wide load range: allowing the system to work without forced cooling. The LLC stage: based on the UCC256301: takes advantage of the ZCS avoidance feature in the UC256301 to enable peak output power: minimizing the PFC Bulk capacitor for meeting holdup requirements: while making the system robust to short circuit and over current conditions. The UCC24612-2 based synchronous rectifier helps in minimizing the losses in the output rectifier: while its advanced proportional gate drive and dead time optimization features helps to avoid shoot through and minimizes losses.