Infineon offer the LED driver IC BCR 450. Specifically designed for driving high power LEDs, the device in combination with an external transistor features precise current control, thermal protection as well as over-voltage and over-current protection functions. As BCR 450 produces no electromagnetic radiation, it is well-suited for applications sensitive against electromagnetic interference (EMI), such as lighting in transportation vehicles including buses, ships, trains and aircrafts, as well as medical applications with communication bus systems. In addition to general lighting systems, BCR 450 also is ideal for applications in architectural and accent lighting, advertising, strobe lights for emergency vehicles, hazard lights and road safety lights.

Technical details

The BCR 450 was specifically designed for use with high-wattage LED’s (for example in the 0.5W, 1W or 3W range) in combination with an external transistor. By simply changing the external transistor, manufacturers of LED lighting have the flexibility to adapt output currents from 100mA to above 1A. The application circuit with BCR 450 has low component count and is free of inductors, capacitors and free-wheeling diode resulting in a very small PCB space requirement. This includes the elimination of electrolytic capacitors which limit the lifetime of switch-mode driver solutions.

Since there is no need for capacitors with BCR 450, the lifetime of the LED system can be extended. Regarding long life operation of LED lighting sources, Infineon recognized the strong demands for thermal management and implemented an effective thermal shut down feature and over-voltage as well as over-current protection into the device. In large parts of the illumination market and especially in architectural lighting a homogenous light output in the whole LED chain of light sources is crucial. The human eye is very sensitive towards shifts in light color.

The BCR 450 with its output current precision varying only +/-10 percent over the entire operating temperature range strongly supports the homogenous light output requirement for LED lighting fixtures.

Availability, package and pricing

Volume production of the BCR 450 LED driver IC has already started. It is available in a 6-pin SC74 package. In quantities of 50,000 units, pricing for the BCR 450 ranges between approximately Euro 0.25 and Euro 0.30 (U.S. dollar 0.30 and U.S. dollar 0.35) per unit.