Constant Current Linear LED Driver IC for Low Current LED Strips

Published  June 9, 2020   0
Infineon's BCR431U LED Driver IC

Infineon Technology has released the second device in the new generation BCR family - BCR431U LED Driver ICs. The new constant current linear LED driver IC provides low voltage drop performance for regulating LED current and it focuses on low current designs of up to 37mA. The IC can have an unmatched voltage drop of 105mV at 15mA in the industry that can provide far more flexibility in lighting applications. The overall efficiency of the device is improved and provides the headroom required to compensate for the LED forward voltage tolerances and variance in the supply voltage

The BRCU431U allows either to add additional LEDs to lighting designs, for example, seven instead of six LEDs in series driven by one IC. Or it can be used to increase the overall length of a LED strip design from, for example, 5 to 7 m. An Ohmic resistor can be used on a dedicated pin with an IC supply voltage ranging between 6 V and 42 V to adjust the LED current. The smart over-temperature controlling circuit maintains the current constant even at rising temperatures to provide safe and reliable operation and to extend the overall LED system’s lifetime. It reduces the LED current only when the junction temperature gets very high.

The BCR431U is designed with a dimming capability of down to 1 percent, which makes it best for a great variety of LED strip designs. The IC can be used in LED Stripschannel letters, architectural LED lighting, LED displays, as well as emergency, retail, and appliance lighting.