The UCC256302 is a fully featured LLC controller with integrated high-voltage gate
driver. It has been designed for use in offline AC-DC or isolated DC-DC to provide a complete power
system using a minimum of external components. The resulting power system is designed to meet the
most stringent requirements for standby power without the need for a separate standby power
UCC256302 includes an integrated, high voltage startup function which eliminates the need
for an external bias supply, reducing BOM count and minimizing solution size. UCC256302 uses hybrid
hysteretic control to provide best in class line and load transient response. The control makes the
open loop transfer function a first order system so that it’s very easy to compensate.
UCC256302 provides a high efficient burst mode with consistent burst power level during
each burst on cycle. The burst power level is programmable and adaptively changes with input
voltage, making the optimization of efficiency very easy.
Select the appropriate LLC resonant controller for your design with UCC25630x Selection
UCC25630-1EVM-291 is an EVM of LLC resonant half-bridge DC-DC power converter with LLC controller UCC256301. UCC25630-1EVM-291 accepts DC line input from 340Vdc to 410Vdc, AC input voltage from 85 VAC to 264 VAC, and outputs nominal 12Vdc with full load output power 120W, or full output current 10A (...)
Optimized low power features enable extreme low standby power
PMP40379 — This single-stage LLC converter reference design illustrates how to convert AC input voltage (100-120 Vac and 200-240 Vac) to isolated ±42-V DC output with the UCC256302 resonant controller. The design has a regulated ±42-V output that can handle up to 6 A of continuous output current (...)
PMP21683 — This resonant converter reference design takes a 380-V to 420-V DC input and generates a 48-V up to 550-W output. With the UCC256302 driver-integrated resonant converter controller and UCC24624, a two-channel synchronous rectifier (SR) driver, this design can achieve 97.95% peak efficiency.
PMP21582 — This reference design uses UCC256302 LLC resonant controller to provide US-line AC input to a 30-V, 250-W output and a 13.8-V, 11-W output conversion. The low profile design has a maximum height of 1 inch. This design achieves 94% peak efficiency at 120-VAC input.
PMP21000 — This reference design provides a 12-V/100-W output from either 120-Vac or 230-Vac input with a single LLC resonant converter stage. The bill of materials (BOM) cost of this design is highly optimized with the single-stage structure and the use of UCC256302 LLC resonant controller. High voltage (...)
PMP40281 — This reference design is a a control card for LLC converter. It integrates all of the essential functions for controlling a LLC converter including the HV start-up, X-capacitor discharge and the drivers for the power FETs. By employing the advanced burst mode, it can also help the LLC converter to (...)