Crank up your power supply with LLC controllers

According to the latest report from the World Bank, energy consumption per capita is increasing exponentially, from 1,200KWh to 3,200KWh. Although there are several driving factors behind this rise in energy consumption, a major one is the increase in the number of electronic devices per household.

Worldwide power consumption increases the need to produce more energy. The question is how to meet this demand for more energy, and the answer lies within the very simple law of economics: supply and demand.

There are two choices:

  • Increase the supply: Electricity manufacturing companies continue to produce more energy.
  • Reduce the demand: Reduce the total power consumption per household which means every power electronics device in household should consume less power.

Figure 1: Supply Demand Curve

While increasing supply seems to be a simple solution, most countries are leaning toward the second option: reducing demand, which would in turn preserve consumption of our natural resources and keep the earth green. Several countries and American states are introducing energy standards like Code of Conduct (CoC) Tier 2, U.S. Department of Energy (DoE) Level VI and California Title 22.

Still, this leads to the next problem: how to control demand when the number of consumers are increasing. The solution to this problem is designing more efficient power supplies that can deliver more energy while wasting less – without creating nightmares for power-supply designers, of course. Designers are looking for magic element that can help them to crank up the performance of the power supply.

TI’s latest inductor-inductor-capacitor (LLC) controller, the UCC256301, introduces a new patented control algorithm, hybrid hysteretic control, to up your game and achieve the industry’s lowest standby power consumption of 40mW with no load. The controller’s ultra-fast transient response enables a reduction of the buck capacitor on the power supply by almost 20%. You can minimize the power loss by rejecting most of the AC ripple, which raises the light load efficiency of the power supply above 90% at a 10% load.

The introduction of this LLC controller comes with a comprehensive tool kit that makes the design experience very easy and leverages several form factor reference designs:

  • I have been using the UCC25600 resonant controller with excellent results.

    I like the simplicity of the UCC25600.

    I have also ordered samples of the UCC256304 and am looking forward to trying them out.