Infineon Low Cost LED Drivers -

Ikrumm — Thu, 07 Oct 2021 03:47:54 GMT

Current Revision posted to Documents by Ikrumm on 10/7/2021 3:47:54 AM

BCR 320U, BCR 420U - New LED Drivers for 0.5 W LEDs

The BCR 320U/BCR420U LED driver family is a low-cost solution for driving 0.5 W LEDs with LED currents from 150 mA to 250 mA. Internal breakdown voltage is 20 V (BCR 320U) and 40 V (BCR 420U). This is the maximum voltage that the LED driver IC can sustain when connected to it directly.
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.

Key features:

- 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

Applications:

- 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

Order number(s): Infineon PN: Farnell PN

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