Selecting a LED controller for your lighting application is not an easy task. There are a host of device variations that have to be considered along with the expertise of the power supply designer. But assuredly most purchasers of LED controllers are looking to accomplish three things – lower system losses (higher efficiency), achieve a smaller system package, and, of course, reduce cost. Bringing product to market faster also is a plus.
Over the years, LED driver and controller manufacturers have been able to meet these demands in several ways. They have incorporated power factor correction (PFC) circuitry for higher power quality or lower power loss; added primary-side regulation (PSR) to lower the cost by eliminating secondary feedback circuitry, and shifted to flyback topology to simplify the design.
Infineon Technologies AG recently introduced a new digital IC platform, called .dp digital power 2.0, which integrates a digital controller with key peripherals in one packaged solution for LED drivers used in lighting systems. This enables LED lighting systems to be controlled intelligently for greater energy savings, Infineon said.
The new platform does reduce design time and the bill of materials (BOM), thus it lowers cost and saves space, but it also includes software – a graphical user interface (GUI) and operating parameter configuration tool – that allows the lighting system manufacturer to configure individual parameters to their requirements. So operation parameters such as output current and protection features can be digitally configurable. The GUI for PCs speeds up engineering by eliminating the need for design iterations. The company said: “At the end of the production line, multiple LED drivers can be built with the same hardware using different ICL8105 parameter sets.”
“This allows our customers greater flexibility because it eliminates the need for costly development of new designs for product variants, since specifications can be defined at the end of the production line,” said Ulrich vom Bauer, who is in charge of marketing for lighting ICs at Infineon, in a statement. “With .dp digital power 2.0, the development time can be reduced by up to 70 percent – therefore, the customer can bring new products to the market significantly faster.” In addition, the digital approach makes innovations possible that can’t be realized using analog components.”
Here are the specs for the ICL8105 digitally configurable flyback controller with PFC for constant power LED drivers from 10 to 80 W. Due to the design’s high level of integration and the control on the primary side, it only requires a few external components, and reduces cost by up to ten percent, the company said. The controller provides an input for 0- to 10-V dimming, and an active burst mode is said to significantly extend the dimming range, while preventing flickering or shimmering. To protect the LED driver in case of over-temperature, the ICL8105 automatically reduces the output current in case of overload.
The ILD2111 is a digitally configurable buck controller and is designed as a constant current source with output current control for LED drivers in the range from 10 to 150 W. This makes the device suited for a range of commercial LED applications. Like the ICL8105, it requires only a few external components. The IC provides flicker-free PWM dimming down to one percent. The component automatically and optimally regulates different loads, depending on the switching frequency and output ripple current. The output voltage is specified with 15 to 55 VDC. It also offers user-configurable functionality to protect the component for undervoltage, overvoltage, short circuits, overcurrent, and high temperatures.
Both the ICL8105 and the ILD2111 are available as samples and can be ordered in high volume. Development boards, the .dp Interface Board and the .dp Vision GUI software are offered for both controllers. Here’s a link to Infineon’s distribution partners.