BCR420UW6:Linear LED Drivers

Part NumberData SheetSPICE ModelQualified to AECQ10xPPAP CapableTopologyMinimum Supply Voltage (V)Maximum Supply Voltage (V)Maximum VOUT (V)Number of ChannelsLED Current Sense Voltage (mV)OutputCurrent (mA)LED Current (mA)Accuracy (%)Frequency (kHz)Efficiency (%)DimmingTemperature Range (°C)
BCR420UW6BCR420UW6_BCR421UW6.pdfBCR420UW6YesNoLinear LED Driver1.4404017003503501010-No-55 to +150
Description

The BCR420U/BCR421U monolithically integrates a transistor, diodes and resistors to function as a Constant Current Regulator (CCR) for linear LED driving. The device regulates with a preset 10mA nominal that can be adjusted with external resistor up to 350mA. 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, it can be used in multiple applications, as long as the maximum supply voltage to the device < 40V.

With the low-side control, the BCR421U has an Enable (EN) pin which can be pulse-width modulated (PWM) up to 10 kHz by a micro controller for LED dimming.

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

Application

Constant Current Regulation (CCR) in:
  • Automotive Interior Lighting
  • Emergency Lighting
  • Signage, Advertising, Decorative and Architectural Lighting
  • Retail Lighting in Fridges, Freezer Cases and Vending Machines

Features
  • LED Constant Current Regulator using NPN Emitter-Follower with Emitter Resistor to Current Limit
  • Iout = 10mA ± 10% Constant Current (Preset)
  • Iout up to 350mA adjustable with an External Resistor
  • Vout = 40V Supply Voltage
  • Pd up to 1W in SOT26 (SC-74)
  • Negative temperature coefficient (NTC) reduces IOUT with increasing temperature
  • Parallel Devices to Increase Regulated Current
  • Totally Lead-Free & Fully RoHS Compliant
  • Halogen and Antimony Free. “Green” Device
  • Qualified to AEC-Q101 Standards for High Reliability
Ordering Information
  • BCR420UW6-7
  • BCR420UW6Q-7
SOT26 (SC74R)
BCR420UW6_BCR421UW6.pdf BCR420UW6