TI enables designers to achieve a new low in standby power

LLC controller provides ultra-fast transient response, robust fault protection and the lowest standby power in the industry for AC/DC applications

Texas Instruments (TI) (NASDAQ: TXN) today introduced a new inductor-inductor-capacitor (LLC) resonant controller with an integrated high-voltage gate driver that enables the industry’s lowest standby power, as well as longer system lifetimes. The UCC256301 provides a cost-effective system solution that helps meet stringent energy-efficiency standards for a wide range of AC/DC applications, including digital televisions, gaming adapters, desktop computer and notebook adapters, and power-tool battery chargers. For more details, see www.ti.com/UCC256301-pr.

“The consumer electronics market demands efficient power supplies with low standby power. With this new family of LLC controllers, TI is enabling designers to do more with less power,” said Steve Lambouses, TI vice president, High Voltage Power. “The UCC256301 was designed to meet tomorrow’s power requirements by delivering breakthroughs in standby power and efficiency while simplifying design and lowering system cost.”

Key features and benefits of the UCC256301

• High efficiency and lowest standby power: By achieving a new low in standby power, the controller exceeds Code of Conduct (CoC) Tier 2 and U.S. Department of Energy (DoE) Level VI efficiency standards and achieves more than 90 percent efficiency with a 10 percent load.
• Faster and more stable system transient performance: Hybrid hysteretic control, a new patented control method from TI, enables up to 10 times faster transient response and reduces output capacitance by 20 percent, leading to faster system response times.
• Extended system lifetime: Robust fault-protection features on the device, such as zero current switching avoidance, extend system lifetimes.
• Simplified design: Engineers can easily design their systems with the integrated X-capacitor discharge and high-voltage startup features.

Complete power-supply design to get to market faster
The UCC256301 is the latest addition to TI’s high-voltage portfolio of end-to-end power-conversion solutions delivering high efficiency. In addition to the UCC256301, the new portfolio of LLC controllers includes the UCC256303, which works easily with an external bias, and the UCC256304, which supports wide input ranges.

Engineers can pair the UCC256301 with a TI power factor correction (PFC) controller and synchronous rectifier (SR) controller to increase system efficiency. To meet a variety of power levels, PFC controllers include the UCC28180, UCC28063, UCC28051 and UCC28070. The UCC24610 SR controller can also be paired with the UCC256301 to further improve efficiency.

Tools and support to speed design
Support tools for the UCC256301 to speed engineers’ time to market include the UCC25630-1EVM-291 evaluation module, WEBENCH® Power Designer and SIMPLIS transient models. Engineers can jump-start high-voltage system designs using the UCC256301 with the  480W AC/DC Industrial Reference Design and 450W AC/DC Reference Design with Single-Layer PCB.

Package, pricing and availability
The UCC256301 is now available in the TI store and through the company’s authorized distribution network. This LLC controller comes in a small-outline integrated circuit (SOIC)-16 package and is priced at US$0.99 in 1,000-unit quantities.

Learn more about the UCC256301 and TI LLC controller portfolio

• Read the Power House blog post, “Crank up your power supply with LLC controllers.”
• Download the application report, “Improving Transient Response in LLC Converters Using Hybrid Hysteretic Control.”
• Visit the TI E2E™ Community Power Management forum to search for solutions, get help, share knowledge and solve problems with fellow engineers and TI experts.