The BCR 320U/ BCR 420U can be operated at supply voltages above 20 V and 40 V respectively by simply stacking a series of LEDs in front of the LED driver IC, resulting in a certain voltage drop depending on the forward voltages of the LEDs. This brings the voltage at the supply pin of the driver IC down to a value below the maximum threshold..
A digital input pin (BCR 321U, BCR 421U) allows the LEDs to be dimmed via a microcontroller with frequencies up to 10 kHz.
At higher temperatures, the output current is reduced by 0.2% /K as a result of the negative thermal coefficient of the LED driver IC.
With no need for additional external components such as inductors, capacitors or free-wheeling diodes, the BCR 320U/BCR 420U LED driver family is a cost-efficient and PCB-saving solution for driving 0.5 W LEDs.
- Continuous output current of up to 150 mA (BCR 420U), 250 mA (BCR 320U)
- Suitable for supply voltages of 20 V and 40 V (depending on the device), configurations above this also possible
- Digital PWM input pin for dimming with frequencies up to 10kHz
- Up to 1 WW power dissipation in a small SC-74 package
- Negative thermal coefficient reduces output current at higher temperatures
- Easy paralleling of drivers to increase current
- PB-free (RoHS- compliant) package
- Architectural LED lighting
- Channel letters for advertising
- LED strips for decorative lighting
- Retail lighting in fridge and freezer cases
- Emergency lighting (steps lighting, exit way signs, etc.)
- Ship, train and aircraft interior illumination