LLC Controller Reaches All-Time Low Standby Power

According to Texas Instruments, its UCC256301 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 controller enables standby power of less than 40 mW when fully regulating the system output, while also performing better than industry efficiency requirements. Other features include:

  • 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.

Support tools for the UCC256301 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.

 

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The UCC256301 is available now in a small-outline integrated circuit (SOIC)-16 package and is priced at $0.99 each/1,000. For more specs, a UCC256301 datasheet is available.

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