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

Infineon Technologies BCR402UE6433HTMA1

Name: BCR402UE6433HTMA1
Brand: Infineon Technologies
SKU: BCR402UE6433HTMA1
Price: 2.40 USD
Availability: InStock
Rating: 5 (2 reviews)

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Part No.:: BCR402UE6433HTMA1

Manufacturer:: Infineon Technologies

Category:: LED Drivers

Package:: SC-74, SOT-457

Datasheet:: BCR402UE6433HTMA1.pdf

Description:: LED DRIVER

Quantity:: RFQ Add To RFQ list

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Inventory:9,978

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Product details

Overview

BCR402UE6433HTMA1 from Infineon Technologies is a linear constant-current LED driver IC in SC74 package, designed for low-power LED biasing with preset 20 mA output (adjustable up to 65 mA via external resistor), 1.4 V minimum voltage overhead, 40 V max supply voltage, and negative thermal coefficient (−0.2 %/K) for LED lifetime protection. It serves as a precision current source in signage, automotive CHMSL, and appliance lighting.

For engineers reviewing the BCR402UE6433HTMA1 datasheet, BCR402UE6433HTMA1 pinout, BCR402UE6433HTMA1 application, or BCR402UE6433HTMA1 equivalent, key selection criteria include its 3-output-terminal parallel capability, thermal derating behavior, SC74 footprint compatibility, and AEC-Q101 qualification for automotive rear lighting systems.

Technical Context

This device operates as a three-terminal adjustable current regulator: VS supplies power, GND establishes reference, and Rext sets output current via I_OUT = V_REF/R_EXT, where V_REF is internally stabilized at 28 mV ±10%. Its architecture integrates thermal foldback without external sensing-output current decreases linearly with junction temperature rise.

The SC74 package supports up to 750 mW total power dissipation at T_S = 25 °C, with R_thJS = 120 K/W. It requires no external compensation and functions as a standalone current source when LEDs are connected between VS and OUT pins, enabling boost-mode operation with external transistors.

Key Specifications

Parameter	Value and Actual Design Meaning
Output Current	Preset 20 mA; adjustable 10–65 mA via R_EXT; enables consistent brightness across varying LED V_F and supply drift.
Voltage Overhead	1.4 V min (VS − V_OUT); allows operation with low-drop LEDs while maintaining regulation margin.
Supply Voltage Range	Up to 40 V DC; supports direct connection to 24 V industrial or 36 V automotive systems without pre-regulation.
Thermal Coefficient	−0.2 %/K; reduces output current at elevated temperatures, extending LED lifetime under thermal stress.
Package Power Dissipation	750 mW at T_S = 25 °C; defines maximum continuous drive capability in SC74 footprint without heatsink.
AEC-Q101 Qualified	Validated for automotive applications including CHMSL and rear combination lamps per stress test requirements.
RoHS Compliance	Pb-free SC74 package; meets EU Directive 2011/65/EU for hazardous substance restrictions.

Pinout & Package

BCR402UE6433HTMA1 uses the SC74 (SOT-26) thermally enhanced 6-pin package with exposed thermal pad (pin 4 is VS, pins 2/3/5 are paralleled OUT terminals, pin 1 is GND, pin 6 is Rext). The package measures 2.9 × 1.6 × 1.1 mm and supports reflow soldering per JEDEC J-STD-020.

Pin/Terminal	Circuit Role	Design Meaning
1 (GND)	Reference ground terminal	Return path for internal current reference and R_EXT bias; must be low-impedance to minimize regulation error.
2, 3, 5 (OUT)	Current output terminals	Paralleled outputs allow stacking multiple drivers to scale current; each pin carries ≤22 mA in standard configuration.
4 (VS)	Positive supply input	Accepts 4.5–40 V; powers internal reference and output stage; connects to LED anode in boost-mode configurations.
6 (Rext)	External current-setting node	Connects to resistor to ground; sets I_OUT = 28 mV / R_EXT; tolerance directly impacts current accuracy.

Key Features

Feature	Design Value
Three paralleled OUT pins	Enables 60 mA+ drive from single SC74 footprint without external current mirrors or MOSFETs.
Integrated thermal foldback	−0.2 %/K coefficient eliminates need for external NTC or thermal shutdown circuitry in ambient ranges up to 125 °C.
Low 1.4 V overhead	Permits use with 2.1 V red LEDs at 24 V bus while retaining >20 V headroom for long cable runs.
AEC-Q101 qualification	Validated for automotive rear lighting per stress tests including HTOL, TC, UHAST, and ESD HBM ≥2 kV.
R_EXT-based current tuning	Supports factory calibration via 1% resistor; avoids laser trimming cost while achieving ±5% I_OUT tolerance.

Applications

Channel Letter Signage

Aircraft Interior Lighting

Use Scenario: Illuminating acrylic channel letters in outdoor advertising cabinets with 12–24 V DC supply and variable ambient temperature.

IC Role / Device Role / Timing Role: Constant-current source regulating individual LED strings independent of forward voltage spread and supply ripple.

Use Value: Eliminates brightness variation across letters caused by LED binning and line drop, reducing field service calls by >40%.

Use Scenario: Cabin reading lights and aisle marker strips in commercial aircraft requiring DO-160G Section 22 lightning surge immunity.

IC Role / Device Role / Timing Role: Primary current regulator for white LEDs powered from 28 V aircraft bus with thermal derating above 60 °C.

Use Value: Maintains safe LED junction temperature during extended flight cycles, meeting FAA Part 25.853 flammability compliance.

Refrigerator Interior Lighting

Automotive CHMSL

Use Scenario: LED strips inside domestic refrigerators operating at −20 °C to +45 °C with frequent door cycling.

IC Role / Device Role / Timing Role: Low-voltage-drop current source driving 3–5 white LEDs per compartment, powered from 5 V SMPS rail.

Use Value: Prevents overcurrent at cold start (where LED V_F rises), avoiding premature LED failure in high-humidity condensation environments.

Use Scenario: Center High-Mount Stop Lamp in passenger vehicles using 12 V battery supply with load dump transients up to 35 V.

IC Role / Device Role / Timing Role: AEC-Q101 qualified current regulator for red LEDs, placed between battery and LED string with TVS protection.

Use Value: Delivers stable 60 mA to dual LED strings during ISO 7637-2 Pulse 5a load dump, ensuring brake light visibility compliance.

Equivalent & Alternatives

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

Alternative Part	Technical Difference	Application Difference	Selection Advice
ON Semiconductor NSI45020AT1G	Fixed 20 mA output only; no R_EXT adjustment; 1.7 V overhead; SOD-123 package.	Lacks thermal foldback and parallel OUT capability; limited to single-string, fixed-current designs.	Select when board space is constrained and current tuning is unnecessary; avoid for multi-LED or thermal-critical layouts.
Diodes Incorporated AL5809-20P1	Adjustable 10–120 mA; 0.5 V overhead; requires external capacitor; SOT-23-5 package.	Higher max current but lower thermal robustness (R_thJA = 250 K/W vs. 120 K/W); no AEC-Q101 rating.	Prefer for non-automotive, high-efficiency designs needing sub-1 V dropout; not suitable for CHMSL or engine bay use.

Compared with NSI45020AT1G and AL5809-20P1, BCR402UE6433HTMA1 uniquely combines AEC-Q101 qualification, three paralleled outputs, and integrated thermal foldback in SC74-making it optimal for automotive rear lamps and industrial signage where reliability, scalability, and thermal safety are co-prioritized.

Availability

BCR402UE6433HTMA1 is available at Aetrix Electronics and suitable for channel letter signage, aircraft interior lighting, and automotive CHMSL requiring stable component supply, AEC-Q101 validation, and thermal-safe LED current regulation.

Supply support for BCR402UE6433HTMA1 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 sensor systems, with global R&D and manufacturing infrastructure.

BCR402UE6433HTMA1 belongs to Infineon's BCR family of linear LED drivers-designed specifically for cost-sensitive, thermally demanding LED lighting in automotive, transportation, and white goods applications.

FAQ

What is the maximum continuous output current achievable with BCR402UE6433HTMA1?

The device delivers 20 mA by default, but supports up to 65 mA when configured with an external R_EXT resistor. At 65 mA, power dissipation reaches ~750 mW in SC74 at T_S = 25 °C; derating is required above that temperature per Figure 3-1 in the datasheet.

Can BCR402UE6433HTMA1 drive LEDs in series with a 12 V supply?

No-it is a constant-current sink, not a boost converter. To drive series LEDs from 12 V, connect the LED string between VS and OUT, using the driver as a current-controlled return path. For example, three 3.2 V LEDs (9.6 V total) leave 2.4 V across the driver, which exceeds its 1.4 V overhead requirement.

How does the negative thermal coefficient affect LED brightness control?

The −0.2 %/K coefficient reduces output current linearly as junction temperature rises, lowering LED power dissipation and junction temperature. This passive thermal management prevents thermal runaway and extends LED lifetime by up to 2× in enclosed fixtures without active cooling.

Is PCB layout critical for thermal performance?

Yes-SC74's exposed thermal pad (connected to pin 4/VS) must be soldered to ≥100 mm² copper area with ≥4 thermal vias to inner/ground planes. Insufficient copper results in >30 °C higher junction temperature at 65 mA, triggering premature thermal foldback and reduced light output.

BCR402UE6433HTMA1 Specifications

Product attributes: Attribute value

Manufacturer:: Infineon Technologies

Series:: -

Package/Case:: SC-74, SOT-457

Packaging:: Tape & Reel (TR)

Product Status:: Active

Type:: Linear

Topology:: Constant Current

Internal Switch(s):: Yes

Number of Outputs:: 1

Voltage - Supply (Min):: 1.4V

Voltage - Supply (Max):: 40V

Voltage - Output:: 40V

Current - Output / Channel:: 65mA

Frequency:: -

Dimming:: -

Applications:: Lighting

Operating Temperature:: 150°C (TJ)

Grade:: Automotive

Qualification:: AEC-Q101

Mounting Type:: Surface Mount

Supplier Device Package:: PG-SC74-6

BCR402UE6433HTMA1 FAQ

1.How can I place an order for BCR402UE6433HTMA1 through Aetrix?

Please submit a Request for Quotation (RFQ) for BCR402UE6433HTMA1 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 BCR402UE6433HTMA1 reliable?

The price and inventory of BCR402UE6433HTMA1 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for BCR402UE6433HTMA1 is usually 5 days.

3.What payment methods are accepted for BCR402UE6433HTMA1?

We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for BCR402UE6433HTMA1 transactions.

Note: Certain payment methods may incur a processing fee.

4.How is shipping managed for BCR402UE6433HTMA1?

BCR402UE6433HTMA1 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.

Once your BCR402UE6433HTMA1 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 BCR402UE6433HTMA1?

For technical support, including BCR402UE6433HTMA1 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your BCR402UE6433HTMA1 requirements.

6.How does Aetrix verify that BCR402UE6433HTMA1 is sourced from the original manufacturer or authorized distributors?

All BCR402UE6433HTMA1 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 BCR402UE6433HTMA1 meets industry standards.

7.What is the process for return or replacement of BCR402UE6433HTMA1?

All BCR402UE6433HTMA1 units undergo pre-shipment inspection (PSI). If there is an issue with BCR402UE6433HTMA1, 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 BCR402UE6433HTMA1 part is unused and in its original packaging.

Return procedure for BCR402UE6433HTMA1:

1.Submit a request within 90 days.

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

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