Constant current linear LED driver IC improves efficiency for LED strips
The BCR430U constant current linear LED driver IC’s drop performance regulates LED current in standalone operation for LED lighting. No external power transistor is needed, says Infineon Technologies. Typical applications for the BCR430U include LED strips, architectural LED lighting, LED displays and retail, appliance and emergency lighting.
The voltage drop of the integrated driver IC can go down to 135mV at 50mA. This improves overall efficiency and provides the voltage headroom required to compensate for LED forward voltage tolerances and variances in the supply voltage, explains Infineon, for more flexibility in lighting design. Using the BRCU430U, additional LEDs can be added to lighting designs without changing the supply voltage.
The LED driver current ranges between five and 100mA, and can be easily adjusted via high Ohmic resistor on a dedicated pin. The supply voltage ranges between 6.0 and 42V. For safe and reliable operation and to extend the LED lifetime, a smart over-temperature controlling circuit reduces the LED current when the junction temperature is very high.
The BCR430U is available now in a SOT-23-6 package.