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

Infineon Technologies BCR405UE6327HTSA1

Name: BCR405UE6327HTSA1
Brand: Infineon Technologies
SKU: BCR405UE6327HTSA1
Price: 2.40 USD
Availability: InStock
Rating: 5 (2 reviews)

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Part No.:: BCR405UE6327HTSA1

Manufacturer:: Infineon Technologies

Category:: LED Drivers

Package:: SC-74, SOT-457

Datasheet:: BCR405UE6327HTSA1.pdf

Description:: IC LED DRIVER LINEAR 50MA SC74-6

Quantity:: RFQ Add To RFQ list

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Inventory:9,725

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Product details

Overview

BCR405UE6327HTSA1 from Infineon Technologies is a linear constant-current LED driver in SC-74 package, delivering 50 mA nominal output with ±5 mA accuracy at 25°C, 1.4 V minimum supply overhead, and -0.15 %/K thermal coefficient for LED lifetime protection. It operates up to 40 V supply, supports external resistor adjustment to 65 mA, and is qualified per AEC-Q101 for automotive rear lighting.

For engineers reviewing the BCR405UE6327HTSA1 datasheet, BCR405UE6327HTSA1 pinout, BCR405UE6327HTSA1 application, or BCR405UE6327HTSA1 equivalent, this page provides verified pin functions, thermal derating curves, current-setting resistor calculation guidance, and AEC-Q101-compliant use cases in CHMSL and decorative LED strips.

Technical Context

The BCR405U implements a monolithic bipolar transistor-based current source with internal 17 Ω reference resistor (typ.) and fixed 0.8 V drop (typ.) across collector-emitter at 50 mA. Its negative thermal coefficient (-0.15 %/K) actively reduces output current as junction temperature rises, preventing thermal runaway in enclosed LED modules.

It supports two operating modes: standalone (LED connected between VS and OUT pins) and boost mode (external power transistor driven by OUT pins), enabling scalable current delivery while maintaining <1% current variation over ±10% supply voltage change.

Key Specifications

Parameter	Value and Actual Design Meaning
Output current	50 mA nominal (±5 mA at 25°C); enables stable illumination of single or parallel low-power LEDs without binning
Supply voltage range	Up to 40 V; supports 12 V/24 V automotive and industrial bus systems with margin for line transients
Voltage overhead	1.4 V min. (VS − VOUT); allows operation with low-drop LED strings and preserves efficiency in space-constrained designs
Thermal coefficient	−0.15 %/K; reduces output current linearly with temperature rise, extending LED lifetime in sealed fixtures
Package	SC-74 (SOT-26); 6-pin surface-mount package with 50 K/W junction-to-solder-point thermal resistance
AEC qualification	AEC-Q101 qualified; validated for automotive rear combination lamps and CHMSL under temperature cycling and humidity testing
Current adjustability	Up to 65 mA via external R_EXT; enables fine-tuning for brightness matching across production batches

Pinout & Package

BCR405UE6327HTSA1 is housed in a compact SC-74 (SOT-26) package with gull-wing leads, optimized for automated placement and reflow soldering. Pin 1 is marked with a dot; device orientation follows JEDEC standard SOT-26 outline.

Pin/Terminal	Circuit Role	Design Meaning
1 (GND)	Ground reference	Common return path for internal bias circuitry and external dimming transistor base
2, 3, 5 (IOUT)	Parallel output terminals	Collectively deliver total load current; paralleling increases current handling and thermal sharing
4 (VS)	Positive supply input	Accepts up to 40 V DC; connects to LED anode in standalone mode or external transistor collector in boost mode
6 (REXT)	External resistor connection	Sets output current above 50 mA; voltage drop across internal reference defines I_OUT = V_drop / (R_INT ∥ R_EXT)

Key Features

Feature	Design Value
Homogeneous LED brightness	Maintains consistent luminance across varying LED forward voltages and long PCB traces due to regulated current-not voltage-delivery
No EMI generation	Linear operation eliminates switching noise, eliminating need for EMI filters in medical and aircraft lighting
High current accuracy	±10% output variation over full supply range (10–40 V) and temperature (−40°C to +80°C)
Robust thermal protection	Negative thermal coefficient ensures automatic current reduction before junction exceeds 150°C, avoiding external thermal shutdown circuits
Low assembly cost	Replaces discrete transistor-resistor solutions with single IC, reducing BOM count and solder joints by >50%

Applications

Automotive CHMSL

Refrigerator Interior Lighting

Use Scenario: Center High-Mount Stop Lamp on passenger vehicles requiring AEC-Q101 compliance and thermal stability.

IC Role / Device Role / Timing Role: Constant-current source regulating 50 mA through red LED string independent of 12 V battery fluctuations.

Use Value: Eliminates brightness drift during cold cranking (6.5 V) and load dump (40 V), meeting UNECE R128 photometric requirements.

Use Scenario: White LED strip illumination inside domestic refrigerators with ambient temperature cycling from −25°C to +45°C.

IC Role / Device Role / Timing Role: Temperature-compensated current regulator ensuring consistent lumen output despite enclosure thermal gradients.

Use Value: Prevents LED overdrive at high ambient, extending service life beyond 50,000 hours without active cooling.

Aircraft Cabin Accent Lighting

Channel Letter Advertising Signs

Use Scenario: Low-power edge-lit signage in commercial aircraft cabins where EMI must not interfere with avionics.

IC Role / Device Role / Timing Role: EMI-free linear LED driver powering multiple parallel 20 mA segments from 28 V DC aircraft bus.

Use Value: Meets RTCA DO-160 Section 20 Level A radiated emissions limits without shielding or filtering components.

Use Scenario: Outdoor channel letter signs exposed to wide temperature swings (−40°C to +85°C) and variable input voltage.

IC Role / Device Role / Timing Role: Thermally adaptive current source driving parallel LED strings with minimal voltage headroom.

Use Value: Maintains uniform brightness across sign face despite solar heating, eliminating hot-spotting and color shift.

Equivalent & Alternatives

The following parts are listed as comparable options for similar constant-current LED driver applications.

Alternative Part	Technical Difference	Application Difference	Selection Advice
NSI45020AT1G	Fixed 20 mA output; no R_EXT adjustability; 2.5 V min. overhead	Limited to ultra-low-power indicator LEDs; unsuitable for 50+ mA CHMSL loads	Select when precise low-current biasing is needed and thermal compensation is secondary
AL8862SP-13	Switching buck LED driver; 65 V input; requires inductor and diode	Higher efficiency (>90%) but adds EMI risk and board area; not AEC-Q101 qualified	Choose for high-input-voltage (>40 V) or efficiency-critical applications where layout space permits

Compared with NSI45020AT1G and AL8862SP-13, BCR405UE6327HTSA1 uniquely balances AEC-Q101 qualification, adjustable 50–65 mA output, 1.4 V overhead, and zero-EMI operation-making it optimal for thermally constrained, safety-certified automotive and medical LED systems.

Availability

BCR405UE6327HTSA1 is available at Aetrix Electronics and suitable for automotive rear lighting, refrigerator interior illumination, aircraft cabin accent lighting, and outdoor channel letter signage requiring stable component supply and AEC-Q101 compliance.

Supply support for BCR405UE6327HTSA1 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 is a German semiconductor manufacturer specializing in power management, automotive electronics, and industrial control ICs, with global manufacturing and quality certification to ISO/TS 16949.

The BCR405U belongs to Infineon's low-cost LED driver product line, designed specifically for AEC-Q101-compliant, thermally robust constant-current biasing in space- and cost-sensitive automotive and appliance lighting.

FAQ

What is the maximum allowable junction temperature for continuous operation?

The BCR405UE6327HTSA1 has a maximum junction temperature of 150°C. Operation above this limit risks permanent degradation of the bipolar transistor structure. Derating begins at 125°C case temperature, where total power dissipation must be reduced to ≤750 mW per the P_TOT vs. T_S curve in the datasheet.

Can the BCR405UE6327HTSA1 drive multiple LEDs in series?

No-it is a constant-current sink, not a boost or buck regulator. It requires the LED string's total forward voltage to remain below (V_S − 1.4 V). For example, at 12 V supply, only up to three standard white LEDs (3.2 V each) may be used in series. Higher LED counts require boost-mode configuration with an external transistor.

How is dimming implemented with this device?

Dimming is achieved by inserting a digital transistor (e.g., BC817) between the GND pin and system ground. The transistor's base is driven by a PWM signal; when off, the BCR405U's internal current mirror shuts down, halting LED current. This method avoids flicker and preserves current regulation during active periods.

Is an external capacitor required for stability?

No external capacitor is required. The BCR405UE6327HTSA1 uses an internally compensated current-source architecture with inherent stability across all load and supply conditions. Adding capacitance at VS or OUT may cause oscillation or slow transient response and is not recommended per Infineon Application Note AN097.

BCR405UE6327HTSA1 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:: -

Internal Switch(s):: No

Number of Outputs:: 1

Voltage - Supply (Min):: 1.4V

Voltage - Supply (Max):: 40V

Voltage - Output:: 38V

Current - Output / Channel:: 50mA

Frequency:: -

Dimming:: -

Applications:: Lighting

Operating Temperature:: -

Grade:: Automotive

Qualification:: AEC-Q101

Mounting Type:: Surface Mount

Supplier Device Package:: PG-SC74-6

BCR405UE6327HTSA1 FAQ

1.How can I place an order for BCR405UE6327HTSA1 through Aetrix?

Please submit a Request for Quotation (RFQ) for BCR405UE6327HTSA1 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 BCR405UE6327HTSA1 reliable?

The price and inventory of BCR405UE6327HTSA1 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for BCR405UE6327HTSA1 is usually 5 days.

3.What payment methods are accepted for BCR405UE6327HTSA1?

We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for BCR405UE6327HTSA1 transactions.

Note: Certain payment methods may incur a processing fee.

4.How is shipping managed for BCR405UE6327HTSA1?

BCR405UE6327HTSA1 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.

Once your BCR405UE6327HTSA1 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 BCR405UE6327HTSA1?

For technical support, including BCR405UE6327HTSA1 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your BCR405UE6327HTSA1 requirements.

6.How does Aetrix verify that BCR405UE6327HTSA1 is sourced from the original manufacturer or authorized distributors?

All BCR405UE6327HTSA1 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 BCR405UE6327HTSA1 meets industry standards.

7.What is the process for return or replacement of BCR405UE6327HTSA1?

All BCR405UE6327HTSA1 units undergo pre-shipment inspection (PSI). If there is an issue with BCR405UE6327HTSA1, 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 BCR405UE6327HTSA1 part is unused and in its original packaging.

Return procedure for BCR405UE6327HTSA1:

1.Submit a request within 90 days.

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

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