Digitally-controllable LED drivers for energy-efficient lighting systems
The step into digital lighting with all its advantages is made possible by digital controllers and software that manufacturers can use to configure individual parameters according to their requirements. “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,” says Ulrich vom Bauer, who is in charge of Marketing for Lighting ICs at Infineon. “With .dp digital power 2.0, the development time can be reduced by up to 70% – therefore, the customer can bring new products to the market significantly faster.”
Infineon is introducing the ICL8105 and ILD2111 controllers; ICL8105 is a digitally configurable flyback controller with Power Factor Correction (PFC) for constant power LED drivers from 10 to 80W. With a high level of integration and control on the primary side, only a few external components are required. The controller has embedded algorithms and supports multiple operating modes, for high efficiency and power factor correction plus low distortion. This produces a high quality of light with no flickering. The controller has an input for 0 to 10V dimming; there is no need for an oscillator including power supply. An active burst mode significantly extends the dimming range, while preventing undesirable effects such as flickering or shimmering. To protect the LED driver in case of overtemperature, the ICL8105 automatically reduces the output current in case of overload.
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 150W, in commercial LED applications. Output current can be set accurately by a resistor, and is also compatible with the LEDset interface. The IC provides flicker-free PWM dimming down to 1%. The component automatically selects an operating window in order to optimally regulate different loads, depending on the switching frequency and the ripple of the output current. The output voltage is specified with 15 to 55 VDC. User-configurable features protect the component at undervoltage and overvoltage, short circuits, overcurrent or high temperatures.
These ICs form part of an LED power supply that can be configured on-site using software. Infineon comments that every fifth kilowatt hour of electricity around the world is used for artificial light. LED technology could save an estimated 13 million tons of CO2 could be saved in Germany alone; in German office buildings, the electricity bill could be reduced by more than €500 million.
Development boards, the .dp Interface Board and the .dp Vision GUI software are available for both controllers.
Infineon; .dp digital power 2.0. Those interested can register to get more product information in the range of the .dp digital power platform.
Infineon will have the ICL8105 and ILD2111 controllers at “International LED Professional Symposium + Expo”. This will be held in Bregenz, Austria from September 22-24th, 2015.
