Infineon BCR431U Linear LED Driver IC
LED forward voltage tolerance and
Provides voltage headroom to compensate for power supply voltage fluctuations


Infineon announced on the 10th that it is launching the constant current linear LED driver IC 'BCR431U'.

The BCR431U provides low voltage drop performance for LED current regulation and is suitable for low current designs driving up to 37mA. Target applications include LED strips, channel signs, architectural LED lighting, LED displays, emergency lighting, retail lighting, and home lighting.

The new LED driver ICs typically have a saturation voltage of 105 mV at 15 mA, providing the voltage headroom needed to compensate for LED forward voltage tolerance and supply voltage variations.

The LED current can be controlled using a large-value ohm resistor on a dedicated pin, and the IC power supply voltage range is 6 to 42 V.

An intelligent overheat control circuit keeps the current constant even as the temperature rises and reduces the LED current if the junction temperature becomes excessively high.

Suitable for a variety of LED strip designs with dimming capability down to 1%, the BCR431U is available in a SOT-23-6 package and a demo board is also available.