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This Linear LED driver is designed to meet the stringent requirements of automotive applications. 

The BCR405UW6 monolithically integrates a transistor, diodes and resistors to function as a Constant Current Regulator (CCR) for LED driving. The device regulates with a preset 50mA nominal that can be adjusted with external resistor up to 100mA. It is designed for driving 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 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. 


  • Interior and Exterior Automotive LED Lighting
  • Dome and Mood Lighting
  • Puddle Lighting
  • Side Marker Lights


  • LED Constant Current Regulator Using PNP Emitter-Follower with Emitter Resistor to Current Limit
  • IOUT = 50mA ± 10% constant current (Preset)
  • IOUT up to 100mA adjustable with an external resistor
  • VS – 40V Supply Voltage
  • PD up to 1W in SOT26/ SC74R
  • LED dimming using PWM up to 25kHz
  • 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 40 V
Maximum VOUT 40 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
BCR405UW6Q-7 Arrow Electronics Central EU 3000 7/8/2020 Buy Now Germany
BCR405UW6Q-7 Mouser Electronics Inc. 2295 7/8/2020 Buy Now United States
BCR405UW6Q-7 Digi-Key Electronics 3518 7/7/2020 Buy Now United States