BCR420U BCR421U BCR420UFDQ / BCR421UFDQ LINEAR LED CONSTANT CURRENT REGULATOR IN U-DFN2020-6 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 The BCR420U and BCR421U monolithically integrate transistors, I up to 350mA Adjustable with an External Resistor OUT diodes and resistors to function as a Constant Current Regulator (BCR421U) (CCR) for linear LED driving. The device regulates with a preset V 40V Supply Voltage OUT 10mA nominal that can be adjusted with an external resistor up to P up to 1.7W in U-DFN2020-6 Package D 350mA. It is designed for driving LEDs in strings and will reduce 0.6mm Height for Low-profile Edge Lighting current at increasing temperatures to self-protect. Operating as a Low-Side Control Enabling PWM Input < 25kHz (BCR421U) series linear CCR for LED string current control, it can be used in Negative Temperature Coefficient (NTC) Reduces I with OUT multiple applications, as long as the maximum supply voltage to the Increasing Temperature device is < 40V. Parallel Devices to Increase Regulated Current Totally Lead-Free & Fully RoHS Compliant (Notes 1 & 2) With the low-side control, the BCR421U has an Enable (EN) pin Halogen and Antimony Free. Green Device (Note 3) which can be pulse-width modulated (PWM) up to 25kHz by a micro- Qualified to AEC-Q101 Standards for High Reliability controller for LED dimming. PPAP Capable (Note 4) With no need for additional external components, this CCR is fully integrated into a 2mm x 2mm x 0.6mm package (U-DFN2020-6) Mechanical Data minimizing PCB area, off-board height, and component count. Case: U-DFN2020-6 Case Material: Molded Plastic. Green Molding Compound. Applications UL Flammability Rating 94V-0 Constant Current Regulation (CCR) in automotive LED lighting: Moisture Sensitivity: Level 1 per J-STD-020 Terminals: Finish - NiPdAu, Solderable per MIL-STD-202, Method Interior and Exterior Automotive LED Lighting e4 208 Dome and Mood Lighting Weight: 0.018 grams (Approximate) Puddle Lighting Side Marker Lights Edge Lighting Strips EN OUT Pin Name Pin Function U-DFN2020-6 OUT Regulated Output Current GND N/C Enable for Biasing Rext EN Transistor (Optional) Rext OUT External Resistor for Rext Adjusting Output Current N/C EN GND Power Ground GND N/C Not Connected Internally Top View Bottom View Internal Device Pin-Out Schematic Ordering Information (Note 5) Part Number Compliance Marking Reel Size (inches) Tape Width (mm) Quantity Per Reel BCR420UFDQ-7 Automotive 420 7 8 3,000 BCR421UFDQ-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 BCR420UFDQ / BCR421UFDQ Marking Information xxx = Part Marking (See Ordering Information) xxx Y = Year: 0~9 W = Week: A~Z: 1~26 week a~z 27~52 week z represents 52 and 53 week Absolute Maximum Ratings (Voltage relative to GND, T = +25C, unless otherwise specified.) A Characteristic Symbol Value Unit BCR420U 40 Enable Voltage V V EN BCR421U 18 Output Current 500 mA I OUT Output Voltage 40 V V OUT Reverse Voltage Between all Terminals 0.5 V V R Thermal Characteristics ( T = +25C, unless otherwise specified.) A Characteristic Symbol Value Unit (Note 6) 1.7 Power Dissipation P W D (Note 7) 1.3 (Note 6) 75 Thermal Resistance, Junction to Ambient R C/W JA (Note 7) 100 Thermal Resistance, Junction to Lead (Note 8) 35 C/W R JL Recommended Operating Junction Temperature Range -55 to +150 T J C Maximum Operating Junction and Storage Temperature Range -65 to +150 T , T J STG ESD Ratings (Note 9) Characteristic Symbol Value Unit JEDEC Class BCR420U 700 V 1B Electrostatic Discharge Human Body HBM Model BCR421U 1000 V 1C BCR420U 300 V B Electrostatic Discharge Machine Model MM BCR421U 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 6, 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 BCR420UFDQ / BCR421UFDQ January 2018 Diodes Incorporated www.diodes.com Document number: DS39535 Rev. 3 - 2