BCR421UW6Q-7 Diodes Incorporated

BCR420U BCR421U BCR420UW6Q / BCR421UW6Q LINEAR LED CONSTANT CURRENT REGULATOR IN SOT26 Description Features These Linear LED drivers are designed to meet the stringent LED Constant Current Regulator using NPN Emitter-Follower with requirements of automotive applications. Emitter Resistor to Current Limit I 10mA 10% Constant Current (Preset) OUT I up to 350mA Adjustable with an External Resistor OUT The BCR420UW6Q and BCR421UW6Q monolithically integrate (BCR421UW6Q) transistors, diodes and resistors to function as a Constant Current V 40V Supply Voltage OUT Regulator (CCR) for linear LED driving. The device regulates with a P up to 1W in SOT26 (SC74R) D preset 10mA nominal that can be adjusted with an external resistor up Low-Side Control Enabling PWM Input < 25kHz (BCR421UW6Q) to 350mA. It is designed for driving LEDs in strings and will reduce Negative Temperature Coefficient (NTC) Reduces I with OUT current at increasing temperatures to self-protect. Operating as a Increasing Temperature series linear CCR for LED string current control, it can be used in Parallel Devices to Increase Regulated Current multiple applications, as long as the maximum supply voltage to the Totally Lead-Free & Fully RoHS Compliant (Notes 1 & 2) device is < 40V. Halogen and Antimony Free. Green Device (Note 3) Qualified to AEC-Q101 Standards for High Reliability With the low-side control, the BCR421UW6Q has an Enable (EN) pin PPAP Capable (Note 4) which can be pulse-width modulated (PWM) up to 25 kHz by a micro- controller for LED dimming. With no need for additional external components, this CCR is fully integrated into an SOT26 minimizing PCB area and component count. Applications Mechanical Data Constant Current Regulation (CCR) in: Case: SOT26 (SC74R) Case Material: Molded Plastic. Green Molding Compound. Automotive Interior Lighting UL Flammability Rating 94V-0 Mood and Decorative Lighting Moisture Sensitivity: Level 1 per J-STD-020 Terminals: Finish - Matte Tin Plated Leads. Solderable per MIL-STD-202, Method 208 Weight: 0.018 grams (Approximate) SOT26 (SC74R ) EN OUT Pin Name Pin Function EN R EXT OUT Regulated Output Current Enable for Biasing OUT EN OUT R EXT Transistor (Optional) External Resistor for R OUT EXT GND Adjusting Output Current GND Power Ground GND Top View Top View Internal Device Pin-Out Schematic Ordering Information (Note 5) Product Compliance Marking Reel Size (inches) Tape Width (mm) Quantity per Reel BCR420UW6Q-7 Automotive 420 7 8 3,000 BCR421UW6Q-7 Automotive 421 7 8 3,000 Notes: 1. No purposely added lead. Fully EU Directive 2002/95/EC (RoHS), 2011/65/EU (RoHS 2) & 2015/863/EU (RoHS 3) compliant. 2. See BCR420UW6Q / BCR421UW6Q Marking Information SOT26 (SC74R) xxx = Part Marking (See Ordering Information) xxx YM = Date Code Marking Y = Year (ex: E = 2017) M = Month (ex: 9 = September) Date Code Key Year 2017 2018 2019 2020 2021 2022 2023 Code E F G H I J K Aug Sep Oct Nov Dec Month Jan Feb Mar Apr May Jun Jul 8 9 O N D Code 1 2 3 4 5 6 7 Absolute Maximum Ratings (Voltage relative to GND, T = +25C, unless otherwise specified.) A Characteristic Symbol Value Unit BCR420UW6Q 40 Enable Voltage V V EN BCR421UW6Q 18 Output Current I 500 mA OUT Output Voltage V 40 V OUT Reverse Voltage Between all Terminals V 0.5 V R Thermal Characteristics ( T = +25C, unless otherwise specified.) A Characteristic Symbol Value Unit (Note 6) 1,190 Power Dissipation mW P D (Note 7) 912 (Note 6) 105 Thermal Resistance, Junction to Ambient R JA (Note 7) 137 C/W Thermal Resistance, Junction to Lead (Note 8) R 50 JL Recommended Operating Junction Temperature Range T -55 to +150 J C Maximum Operating Junction and Storage Temperature Range T , T -65 to +150 J STG ESD Ratings (Note 9) Characteristics Symbols Value Unit JEDEC Class BCR420UW6Q 500 V 1B Electrostatic Discharge Human Body HBM Model BCR421UW6Q 1,000 V 1C BCR420UW6Q 300 V B Electrostatic Discharge Machine MM Model BCR421UW6Q 400 V C Notes: 6. For a device mounted with the OUT leads on 50mm x 50mm 1oz copper that is on a single-sided 1.6mm FR-4 PCB device is measured under still air conditions while operating in steady-state. 7. Same as Note 5, except mounted on 25mm x 25mm 1oz copper. 8. R = Thermal resistance from junction to solder-point (at the end of the OUT leads). JL 9. Refer to JEDEC specification JESD22-A114 and JESD22-A115. 2 of 13 BCR420UW6Q / BCR421UW6Q July 2018 Diodes Incorporated www.diodes.com Document number: DS38302 Rev. 4 - 2