LLC controller chip can cut standby power to “new lows” – TI

LLC controller chip can cut standby power to “new lows” – TI

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By eeNews Europe

UCC256301 helps meet stringent energy-efficiency standards for a range of AC/DC applications, including digital televisions, gaming adapters, desktop computer and notebook adapters, and power-tool battery chargers. The first in a family of LLC controllers, it enables standby power of less than 40 mW when fully regulating the system output, while also performing better than industry efficiency requirements. Fastest transient response plus robust fault-protection features such as zero current switching avoidance yields reliable operation over end-equipment lifetimes.


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% efficiency with a 10% load. Hybrid hysteretic control, a control method from TI, enables up to 10 times faster transient response and reduces output capacitance by 20%, leading to faster system response times. Fault-protection features on the device, such as zero current switching avoidance, extend system lifetimes. Engineers can design their systems with the integrated X-capacitor discharge and high-voltage startup features.


Support tools for the UCC256301 include the UCC25630-1EVM-291 evaluation module, WEBENCH Power Designer and SIMPLIS transient models. Engineers can begin 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.


This LLC controller comes in a small-outline integrated circuit (SOIC)-16 package and is priced at $0.99 (1,000.





blog post, “Crank up your power supply with LLC controllers.”

application report, “Improving Transient Response in LLC Converters Using Hybrid Hysteretic Control.”


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