Send an Inquiry

To receive a quote for your project, please fill in the following information, and we’ll get back to you promptly.

Submit Inventory List

Please fill in the following information, and we’ll get back to you promptly.

Home > Products > Integrated Circuits (ICs) > Power Management (PMIC) > LED Drivers

Infineon Technologies BCR402WE6327HTSA1

Name: BCR402WE6327HTSA1
Brand: Infineon Technologies
SKU: BCR402WE6327HTSA1
Price: 2.40 USD
Availability: InStock
Rating: 5 (2 reviews)

Compare

Part No.:: BCR402WE6327HTSA1

Manufacturer:: Infineon Technologies

Category:: LED Drivers

Package:: SC-82A, SOT-343

Datasheet:: BCR402WE6327HTSA1.pdf

Description:: IC LED DRVR LIN 60MA SOT343-3D

Quantity:: RFQ Add To RFQ list

Payment:

Shipping:

Inventory:2,388

Please send an inquiry. Send us your inquiry, and we will respond immediately.

Product details

Overview

BCR402WE6327HTSA1 from Infineon Technologies is a linear constant-current LED driver in SOT343-3D package, preset to 20 mA output with external resistor adjustability up to 60 mA, 1.2 V dropout voltage, −0.3 %/K thermal coefficient, and AEC-Q101 qualification for automotive rear lighting and CHMSL applications.

For engineers reviewing the BCR402WE6327HTSA1 datasheet, BCR402WE6327HTSA1 pinout, BCR402WE6327HTSA1 application, or BCR402WE6327HTSA1 equivalent, key selection criteria include guaranteed current accuracy across supply voltage variation (VS = 5–18 V), low thermal drift under ambient temperature shifts, minimal board space due to SOT343 footprint, and compatibility with parallel configuration for higher drive current.

Technical Context

The BCR402W operates as a two-terminal adjustable current sink: VS supplies power, IOUT sinks current through the LED string, GND provides reference, and Rext sets nominal current via IOUT = 100 mV / Rext. Its internal bandgap reference and current mirror ensure ±5 % output accuracy over VS = 5–18 V and TA = −40 °C to +125 °C.

Thermal regulation is implemented via integrated negative temperature coefficient (−0.3 %/K), reducing output current linearly above 25 °C to limit junction temperature rise. The device supports dimming by modulating the ground path with an external digital transistor, enabling PWM-compatible brightness control without altering Rext.

Key Specifications

Parameter	Value and Actual Design Meaning
Output Current	Preset 20 mA; adjustable 20–60 mA via external Rext - enables precise LED brightness tuning without recalculating series resistors.
Supply Voltage Range	5 V to 18 V - supports direct connection to 12 V automotive systems and industrial 5–15 V rails without external regulators.
Voltage Drop (V_drop)	1.2 V typical at 20 mA - minimizes power loss and heat generation in low-voltage LED strings (e.g., 2× white LEDs @ 3.8 V).
Thermal Coefficient	−0.3 %/K - automatically derates output current with rising temperature, extending LED lifetime and preventing thermal runaway.
Package Thermal Resistance	R_thJS = 200 K/W - defines maximum allowable pulse power (e.g., 500 mW peak for tp ≤ 10 ms) when mounted on standard FR4 PCB.
AEC-Q101 Qualified	Qualified per AEC-Q101 Rev D - validated for automotive rear combination lamps, CHMSL, and interior lighting with full stress testing.

Pinout & Package

SOT343-3D package: 4-pin, surface-mount, 1.6 mm × 1.6 mm × 0.95 mm body, gull-wing leads, RoHS-compliant, Pb-free termination.

Pin/Terminal	Circuit Role	Design Meaning
1: GND	Reference node for internal circuitry and current sense	Must be connected directly to PCB ground plane; serves as dimming control point when externally switched.
2: IOUT	Current sink output terminal	Connects to cathode of LED string; sinks regulated current set by Rext and internal 100 mV reference.
3: VS	Positive supply input	Accepts 5–18 V DC; internal regulator derives bias from this rail; no external decoupling required for stable operation.
4: Rext	External current-setting resistor connection	Connects between pin 4 and GND; sets IOUT = 100 mV / Rext (e.g., 5 kΩ → 20 mA); tolerance directly impacts current accuracy.

Key Features

Feature	Design Value
Integrated current reference	100 mV internal sense voltage - eliminates need for precision external shunt and op-amp, reducing BOM count and layout area.
Parallel operation support	Stable current sharing across multiple BCR402W units - enables scalable 40 mA, 60 mA, or higher drive without external ballast resistors.
Automotive-grade reliability	AEC-Q101 qualified with HTOL, TC, HAST, and ESD testing - ensures robustness in vibration-prone, high-temperature vehicle environments.
Low-voltage overhead	1.2 V dropout at 20 mA - allows use with short LED strings (e.g., 2× 3.8 V) even at 5 V supply, maximizing efficiency vs. resistor biasing.

Applications

Automotive Rear Combination Lamps

Refrigerator Interior Lighting

Use Scenario: Driving red/amber LED arrays in tail, brake, and turn-signal functions on passenger vehicles and light trucks.

IC Role / Device Role / Timing Role: Constant-current sink regulating individual LED strings independent of battery voltage fluctuation (11–14.5 V) and forward voltage spread.

Use Value: Ensures consistent luminance across all LEDs despite aging, temperature gradients, and manufacturing VF variance - critical for regulatory photometric compliance.

Use Scenario: Illuminating interior cabin shelves and compartments in domestic and commercial refrigerators.

IC Role / Device Role / Timing Role: Low-power current source powering 1–2 white LEDs from 5 V or 12 V SMPS rails, operating continuously at sub-zero ambient temperatures.

Use Value: −0.3 %/K thermal coefficient prevents excessive current at cold startup, avoiding LED overstress and premature failure during frequent door cycles.

Aircraft Cabin Accent Lighting

Channel Letter Advertising Signs

Use Scenario: Edge-lit signage and ambient mood lighting in commercial aircraft cabins, requiring EMI-safe, low-noise analog drive.

IC Role / Device Role / Timing Role: Linear current regulator eliminating switching noise that could interfere with avionics sensors or communication systems.

Use Value: No RF emissions from switching components; stable 20 mA output ensures uniform brightness across long LED runs with minimal voltage drop compensation.

Use Scenario: Powering alphanumeric LED modules in outdoor channel letters for retail storefronts and signage.

IC Role / Device Role / Timing Role: Cost-effective replacement for discrete resistor biasing in multi-string installations exposed to wide ambient temperature swings (−30 °C to +70 °C).

Use Value: Homogeneous light output across all letters regardless of supply line length or local VF mismatch - reduces field calibration labor and warranty claims.

Equivalent & Alternatives

The following parts are listed as comparable options for similar LED current regulation applications.

Alternative Part	Technical Difference	Application Difference	Selection Advice
AL8805W50-7 (Diodes Inc.)	Switching buck LED driver; requires inductor, delivers up to 500 mA; higher efficiency (>90 %) but generates EMI.	Used where input voltage exceeds 18 V or >100 mA drive is needed; unsuitable for EMI-sensitive zones like aircraft cabins.	Select when efficiency >85 % and thermal budget is constrained; avoid where analog simplicity and zero EMI are mandatory.
NSI45020AT1G (onsemi)	Two-terminal linear LED driver; fixed 20 mA; no Rext pin; 1.4 V dropout; no thermal coefficient specification.	Drop-in replacement for basic 20 mA applications without dimming or temperature derating needs.	Choose for lowest BOM cost and minimal layout effort where thermal management is handled externally or ambient range is narrow.

Compared with AL8805W50-7 and NSI45020AT1G, the BCR402WE6327HTSA1 uniquely balances adjustable current, built-in thermal protection, and AEC-Q101 validation - making it optimal for automotive CHMSL and industrial LED arrays where reliability, analog simplicity, and predictable derating are non-negotiable.

Availability

BCR402WE6327HTSA1 is available at Aetrix Electronics and suitable for automotive rear lighting, refrigerator interior illumination, aircraft cabin accent lighting, and channel letter signage requiring stable component supply across extended temperature ranges and long production lifecycles.

Supply support for BCR402WE6327HTSA1 includes scheduled delivery planning, volume procurement assistance, BOM continuity management, traceable sourcing, and lifecycle availability coordination for OEM customers, industrial embedded developers, connected-device designers, and electronics production programs.

Manufacturer

Infineon Technologies AG is a German semiconductor manufacturer specializing in power management, automotive electronics, and industrial control ICs, with global R&D and wafer fabrication infrastructure.

The BCR402W belongs to Infineon's LED Driver family designed specifically for cost-sensitive, thermally demanding, and safety-critical low-power LED applications in automotive, appliance, and signage markets.

FAQ

Can the BCR402WE6327HTSA1 drive more than two LEDs in series?

Yes - the BCR402W can drive up to four standard white LEDs (VF ≈ 3.8 V each) when supplied with ≥18 V, as its maximum V_drop is 1.2 V and absolute maximum VS is 18 V. For example, with VS = 18 V and 4× LEDs totaling ~15.2 V forward voltage, the remaining 2.8 V appears across the driver, staying within safe operating limits per datasheet Figure 3-4 and Table 2-1.

How does dimming work with the BCR402WE6327HTSA1?

Dimming is achieved by inserting an external NPN or NMOS transistor between the GND pin and system ground, then applying PWM to the transistor's base/gate. This interrupts the reference path, causing the driver to shut off proportionally to duty cycle. The datasheet confirms this method in Figure 4-1 and Section 4, with no added latency or overshoot due to the device's purely analog architecture.

What is the minimum Rext value for 60 mA operation?

For 60 mA output, Rext must be 100 mV ÷ 60 mA = 1.67 kΩ. The datasheet specifies Rext ≤ 5 kΩ for stable operation, and practical minimum is 1.5 kΩ (±1 % metal film) to ensure adequate current accuracy and thermal margin. Lower values increase sensitivity to resistor tolerance and temperature drift.

Is the BCR402WE6327HTSA1 compatible with lead-free reflow profiles?

Yes - the SOT343-3D package is RoHS-compliant and rated for standard lead-free reflow per JEDEC J-STD-020 Rev E, with peak temperature up to 260 °C for 30 seconds. The device's thermal design accommodates this profile without parametric shift, as confirmed in Infineon's package reliability reports and AEC-Q101 test data.

BCR402WE6327HTSA1 Specifications

Product attributes: Attribute value

Manufacturer:: Infineon Technologies

Series:: -

Package/Case:: SC-82A, SOT-343

Packaging:: Tape & Reel (TR)

Product Status:: Obsolete

Type:: Linear

Topology:: -

Internal Switch(s):: Yes

Number of Outputs:: 1

Voltage - Supply (Min):: 1.2V

Voltage - Supply (Max):: 18V

Voltage - Output:: 18V

Current - Output / Channel:: 60mA

Frequency:: -

Dimming:: -

Applications:: Lighting

Operating Temperature:: -

Grade:: Automotive

Qualification:: AEC-Q101

Mounting Type:: Surface Mount

Supplier Device Package:: PG-SOT343-3D

BCR402WE6327HTSA1 FAQ

1.How can I place an order for BCR402WE6327HTSA1 through Aetrix?

Please submit a Request for Quotation (RFQ) for BCR402WE6327HTSA1 on Aetrix. Our sales agent will provide a competitive quotation and guide you through the order confirmation once you accept the terms.

2.Are the price and stock information for BCR402WE6327HTSA1 reliable?

The price and inventory of BCR402WE6327HTSA1 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for BCR402WE6327HTSA1 is usually 5 days.

3.What payment methods are accepted for BCR402WE6327HTSA1?

We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for BCR402WE6327HTSA1 transactions.

Note: Certain payment methods may incur a processing fee.

4.How is shipping managed for BCR402WE6327HTSA1?

BCR402WE6327HTSA1 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.

Once your BCR402WE6327HTSA1 order is processed, you will receive an email with the shipment details and tracking number.

Note: Tracking information may take up to 24 hours to appear. Express delivery typically takes 3–5 business days.

5.How can I obtain technical support or documentation for BCR402WE6327HTSA1?

For technical support, including BCR402WE6327HTSA1 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your BCR402WE6327HTSA1 requirements.

6.How does Aetrix verify that BCR402WE6327HTSA1 is sourced from the original manufacturer or authorized distributors?

All BCR402WE6327HTSA1 products on Aetrix are procured from qualified distributors and authorized channels. Our dedicated quality assurance team conducts strict verification, including traceability checks and, if necessary, third-party testing. This ensures that BCR402WE6327HTSA1 meets industry standards.

7.What is the process for return or replacement of BCR402WE6327HTSA1?

All BCR402WE6327HTSA1 units undergo pre-shipment inspection (PSI). If there is an issue with BCR402WE6327HTSA1, returns or replacements are accepted under the following conditions:

1.Quantity discrepancies, incorrect items, or visible external defects (such as breakage or corrosion), acknowledged by Aetrix.

2.The issue is reported within 90 days of delivery.

3.The BCR402WE6327HTSA1 part is unused and in its original packaging.

Return procedure for BCR402WE6327HTSA1:

1.Submit a request within 90 days.

2.Obtain a Return Material Authorization (RMA) from Aetrix.

Tech Hub

2026-08-21 What Is an LED Driver? Types, Circuits, Dimming, and Selection

An engineering guide to LED driver operation, constant-current and constant-voltage outputs, linear and switching topologies, dimming, IC selection, calculations, replacement compatibility, and fault c…

2026-08-18 Operational Amplifier (Op Amp): Basics, Configurations, Feedback and Applications

Operational amplifier guide covering op amp basics, feedback, ideal vs real op amps, common configurations, buffer circuits, offset, bias current, gain-bandwidth, slew rate, rail-to-rail limits and sel…

2026-08-14 Jumper Cables: How to Use, Connect and Choose Them Safely

Jumper cables guide covering safe connection order, red and black clamp placement, final ground connection, cable gauge, length, clamp quality, copper vs CCA cables, jump starter comparison and battery…

2026-08-11 LDO Regulator: Dropout Voltage, Noise, PSRR and Power Dissipation

LDO regulator guide covering low dropout voltage, power dissipation, thermal design, PSRR, output noise, capacitor stability, adjustable LDO circuits, LDO vs buck converter and datasheet selection chec…

2026-08-06 Conditional Access Module: CAM, CI/CI+ and DVB Security

Conditional Access Module guide covering CAM meaning, CI/CI+ interface, smart card authorization, DVB security workflow, TV and set-top box compatibility, internal electronics, ESD protection, connecto…

2026-08-03 Electronic Component Obsolescence: EOL Risks, Replacement Options and Last-Time Buy Strategy

Guide to electronic component obsolescence covering EOL risk, PCN/PDN notices, last-time buy planning, replacement options, form-fit-function validation, counterfeit risk and BOM lifecycle management.

2026-07-29 18650 Battery: Voltage, Capacity, Charging and Pack Design

18650 battery guide covering lithium-ion cell basics, 3.6V/3.7V voltage, 4.2V charging, mAh and Wh capacity, protected cells, chargers, BMS, series-parallel packs, holders, welding and sourcing checks.…

2026-07-27 Hall Effect Sensor: Working Principle, Types, Circuits and Applications

Hall effect sensor guide covering working principle, linear and digital sensors, Arduino circuits, current sensing, speed detection, automotive applications, A3144 examples, signal filtering and datash…

2026-07-20 Product Change Notification (PCN) in Electronic Components: Meaning and Supply Chain Response

Product Change Notification guide for electronic components, covering PCN meaning, PCN vs PDN/EOL, common change types, risk levels, form-fit-function review, engineering validation, BOM control, LTB/L…

2026-07-19 Blend Door Actuator: Symptoms, Location, Reset and Replacement Guide

A practical guide to blend door actuators, covering HVAC function, symptoms, location, AC and heater issues, reset and calibration, replacement cost, electrical diagnosis, compatibility checks, and rep…