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BCR320U & BCR321U LED Drivers


LED drivers provide a constant current over the supply voltage range


Infineon's BCR320U and BCR321U provide a low-cost solution for driving 0.5 W LEDs with a typical LED current of 150 mA to 200 mA. The internal breakdown voltage is greater than 16 V and this is the maximum voltage that the LED driver IC can sustain when the output is directly connected to supply voltage. The BCR320 and BCR321U can be operated at supply voltages of 16 V or higher by regarding the voltage drop of the LED load, which reduces the supply voltage to the maximum output voltage of the driver. The enable pin (BCR320) can withstand a maximum voltage of 25 V, which can also be increased by stacking a series in front of the LED drivers that results in a certain voltage drop of the LEDs, reducing the voltage at the enable pin below 25 V. A digital input pin (BCR321U) allows dimming via a microcontroller with frequencies of up to 10 kHz. A reduction of the output current at higher temperatures is the result of the negative temperature coefficient of 0.2 percent/K of the LED drivers. With no need for additional external components like inductors, capacitors and free wheeling diodes, the BCR320U/BCR321U LED drivers are a cost-efficient and PCB-area saving solution for driving 0.5 W LEDs. Datasheet Infineon Technologies' LED Driver

Features
  • Digital PWM input up to 10 kHz frequency (BCR321U)
  • Up to 1 W power dissipation in a small SC74 package
  • Easy paralleling of drivers to increase current
  • Negative thermal coefficient reduces output current at higher temperatures
  • PB-free (RoHS compliant) package
  • Automotive qualified according to AEC Q101
  • Continuous output current up to 250 mA with
    external resistor
  • Supply voltage up to 24 V

Applications
  • Retail lighting in fridge, freezer case, and
    vending machines
  • Channel letters for advertising, LED strips
    for decorative lighting
  • Architectural LED lighting
  • Emergency lighting
    (e.g. steps lighting, exit way signs, etc.)

Digi-Key P/N Manufacturer P/N Description
BCR 320U E6327INCT-ND BCR 320U E6327 IC LED DRIVER LINEAR SC74
BCR 321U E6327INCT-ND BCR 321U E6327 IC LED DRIVER LINEAR SC74
Available in Tape & Reel (TR-ND), Cut Tape (CT-ND), and custom Digi-Reel® (DKR-ND)