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The BCR401UW6Q monolithically integrates a transistor, diodes and resistors to function as a Constant Current Regulator (CCR) for LED driving. The device regulates with a preset 10mA nominal that can be adjusted with external resistor up to 60mA. It is designed for driving 0.25W LEDs in strings and will reduce current at increasing temperatures to self-protect. Operating as a series linear CCR for LED string current control then it can be used in applications > 18V supply, as long as the maximum supply voltage to the device < 18V.

With no need for additional external components, this CCR is fully integrated into a SOT26 minimizing PCB area and component count.


Constant current regulation (CCR) in:

  • Emergency lighting
  • Signage, advertising, decorative and architectural lighting
  • Retail lighting in fridge, freezer case and vending machines


  • LED Constant Current Regulator Using PNP Emitter-Follower with Emitter Resistor to Current Limit
  • IOUT = 10mA ± 10% constant current (Preset)
  • IOUT up to 60mA adjustable with an external resistor
  • VOUT = 18V Supply Voltage
  • PD up to 750mW in SOT26
  • Negative temperature coefficient (NTC) reduces IOUT with increasing temperature
  • Parallel devices to increase regulated current

Product Specifications

Product Parameters

Qualified to AECQ10x Yes
Automotive Compliant PPAP Yes
Topology Linear LED Driver
Minimum Supply Voltage 1.4 V
Maximum Supply Voltage 18 V
Maximum VOUT 18 V
Number of Channels 1
LED Current Sense Voltage 700 mV
Output Current 100 mA
LED Current Preset mA
Accuracy 10 %
Dimming No
Temperature Range -55 to 150 °C

Related Content

SOT26 (SC74R)


Technical Documents


Recommended Soldering Techniques


Orderable Part Number Authorized Distributor Quantity Inventory Date Buy Online Region
BCR401UW6Q-7 Mouser Electronics Inc. 3888 7/8/2020 Buy Now United States
BCR401UW6Q-7 Digi-Key Electronics 2971 7/7/2020 Buy Now United States