Diodes Incorporated
U DFN2020 6 Type F

Image shown is for reference only. Actual package may vary. Refer to the product data sheet for package details.

U-DFN2020-6-Type-F.png
Back to Linear LED Drivers

BCR421UFDQ

10mA-350mA, Adjustable, DFN2020

Contact Sales

Log in or register to manage email notifications about changes to datasheets or PCNs for this part.

Description

These Linear LED drivers are designed to meet the stringent requirements of automotive applications.

The BCR420U and BCR421U monolithically integrate transistors, 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 an 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 is < 40V.

With the low-side control, the BCR421U has an Enable (EN) pin which can be pulse-width modulated (PWM) up to 25kHz by a micro-controller for LED dimming.

With no need for additional external components, this CCR is fully integrated into a 2mm x 2mm x 0.6mm package (U-DFN2020-6) minimizing PCB area, off-board height, and component count.

Feature(s)

  • 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 (BCR421U)
  • VOUT – 40V Supply Voltage
  • PD up to 1.7W in U-DFN2020-6 Package
  • 0.6mm Height for Low-profile Edge Lighting
  • Low-Side Control Enabling PWM Input < 25kHz (BCR421U)
  • 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
  • PPAP Capable

Application(s)

  • Automotive Interior Lighting
  • Mood and Decorative Lighting
  • Edge Lighting Strips

Product Specifications

Product Parameters

AEC Qualified Yes
Compliance (Only Automotive supports PPAP) Automotive
Topology Linear LED Driver
Minimum Supply Voltage (V) 1.4 V
Maximum Supply Voltage (V) 40 V
Maximum VOUT (V) 40 V
Number of Channels 1
LED Current Sense Voltage (mV) 700 mV
Output Current (mA) 350 mA
Channel Max. Output Current (mA) 10 Preset mA
Accuracy (%) 10 %
Dimming PWM by external transistor
Temperature Range (°C) -55 to 150 °C

Related Content

Packages

Technical Documents

SPICE Model

Recommended Soldering Techniques

TN1.pdf

RoHS CofC