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The BCR402UW6Q monolithically integrates a transistor, diodes and resistors to function as a Constant Current Regulator (CCR) for LED driving. The device regulates with a preset 20mA nominal that can be adjusted with external resistor up to 65mA. 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 it can be used in applications with supply voltages up to 40V.

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 = 20mA ± 10% constant current (Preset)
  • IOUT up to 65mA adjustable with an external resistor
  • VOUT = 40V 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
PPAP Capable Yes
Topology Linear LED Driver
Minimum Input Voltage 1.4 V
Maximum Input Voltage 40 V
Maximum Output Voltage 40 V
Maximum LED Current 0.1 A
Preset LED Current 0.02 A
LED Current Accuracy 10 %
Switching Frequency Maximum N/A kHz
Dimming No PWM
Dimming (Analog) No
Efficiency N/A %
Operating Temperature Range -55 to 150 °C
Sense Voltage 700 mV
AEC-Q100 Grade N/A

Related Content

SOT26 (SC74R)


Quality & Reliability

Technical Documents


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Orderable Part Number Authorized Distributor Quantity Inventory Date Buy Online Region
BCR402UW6Q-7 Mouser Electronics Inc. 1430 7/17/2019 Buy Now Americas
BCR402UW6Q-7 Digi-Key Electronics 1828 7/16/2019 Buy Now Americas