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Infineon Technologies BCR450E6327HTSA1
- Part No.:
- BCR450E6327HTSA1
- Manufacturer:
- Infineon Technologies
- Category:
- LED Drivers
- Package:
- SC-74, SOT-457
- Datasheet:
-
BCR450E6327HTSA1.pdf
- Description:
- IC LED DRVR LIN PWM 85MA SC74-6
- Quantity:
- Payment:
- Shipping:
Inventory:1,900
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Product details
Overview
BCR450E6327HTSA1 from Infineon Technologies is a constant-current LED driver IC designed for high-precision current regulation in standalone or external-transistor configurations. It delivers up to 85 mA output with ±3% current accuracy (typ. 150 mV sense voltage), operates from 8–27 V supply, features EN-pin PWM dimming, thermal foldback at 130–170 °C, and integrates bandgap reference and overvoltage protection. Used in architectural lighting and signal markers where stable color rendering and compact size are critical.
For engineers reviewing the BCR450E6327HTSA1 datasheet, BCR450E6327HTSA1 pinout, BCR450E6327HTSA1 application, or BCR450E6327HTSA1 equivalent, key selection factors include its 150 mV typical Vsense tolerance, 10 μs turn-on response, SC-74 package footprint (2.9 × 2.5 × 1.1 mm), standby current of 200 nA, and compatibility with external NPN transistors for >100 mA loads.
Technical Context
The BCR450 functions as a precision current sink using an internal bandgap-referenced op-amp that regulates current via feedback from the Vsense pin. Its output stage drives either the LED load directly (≤85 mA) or an external NPN transistor (up to 2.5 A), enabling scalable current delivery without inductors.
Control logic is implemented through the EN pin, supporting both on/off switching and PWM dimming up to 1 kHz with 5% minimum duty cycle. Protection includes overvoltage shutdown at 27 V, thermal foldback activation between 130–170 °C, and ESD robustness (2 kV HBM).
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Output current accuracy | ±3% over temp & supply; enables stable LED color and lumen output in lighting systems |
| Vsense (typ.) | 150 mV; low-sense-voltage design minimizes power loss in shunt resistor (e.g., 1.76 Ω @ 85 mA) |
| Supply voltage range | 8–27 V; supports 12 V/24 V industrial and transportation power rails |
| Thermal shutdown threshold | 130–170 °C; protects IC and LEDs during thermal overload with foldback before shutdown |
| Standby current | 200 nA at EN = 0 V; enables ultra-low-power off-state in battery-backed or energy-sensitive designs |
| PWM response time | TON = 10 μs, TOFF = 70 μs; supports fast brightness transitions without visible flicker at ≤1 kHz |
| Junction-to-solder-point Rth | 75 K/W; defines thermal path efficiency for PCB copper pour design in SC-74 layout |
Pinout & Package
BCR450E6327HTSA1 is housed in an SC-74 (SOT-26) package: 6-pin, surface-mount, 2.9 mm × 2.5 mm × 1.1 mm body, lead pitch 0.95 mm, matte tin-plated leads.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 (Iout) | Current sink output | Drives cathode of LED string or base of external NPN transistor; rated for 100 mA max continuous |
| 2 (GND) | Digital ground reference | Common return for EN, Vsense, and internal bandgap; must be low-impedance connection to PCB ground plane |
| 3 (EN) | Enable/PWM control input | Active-high logic input; accepts 0.6–5 V for on/off; 5 V tolerant with internal ESD diode |
| 4 (Vsense) | Current-sense feedback node | Monitors voltage across external sense resistor; regulated at 150 mV ±15 mV for precise current setting |
| 5 (GND) | Analog ground reference | Dedicated ground for Vsense and internal op-amp; recommended to tie to Pin 2 at single point near IC |
| 6 (Vs) | Positive supply input | Accepts 8–27 V DC; internal overvoltage clamp activates at 27 V to protect downstream circuitry |
Key Features
| Feature | Design Value |
|---|---|
| Low-Vsense current regulation | 150 mV typical sense voltage reduces I²R loss and heat in sense resistor by >85% vs. 1 V references |
| Integrated thermal foldback | Gradually reduces output current above 130 °C to prevent thermal runaway before hard shutdown at 150 °C |
| No inductor required | Linear topology eliminates EMI concerns and simplifies layout-ideal for space-constrained lighting modules |
| External transistor scalability | Supports >100 mA loads via BCX68-25 or similar NPN; maintains same current accuracy and thermal protection |
| Ultra-low standby consumption | 200 nA shutdown current enables multi-year battery life in emergency signage or IoT marker lights |
Applications
| Architectural Lighting | Transportation Lighting |
|---|---|
Use Scenario: Linear LED strips in ceiling coves and façade accents requiring uniform brightness and color consistency across long runs. IC Role / Device Role / Timing Role: Constant-current sink regulating individual LED segments; no timing function-pure analog current control. Use Value: ±3% current accuracy ensures <2% lumen variation across units, eliminating visible banding in continuous installations. | Use Scenario: Interior cabin lighting in railcars and aircraft where EMI-free operation and vibration resilience are mandatory. IC Role / Device Role / Timing Role: Primary LED current controller; EN pin accepts PWM from vehicle CAN bus interface for centralized dimming control. Use Value: No inductors eliminate magnetic interference with avionics/signal systems; SC-74 package withstands mechanical shock per MIL-STD-810. |
| Signal & Marker Lights | Industrial LED Controllers |
Use Scenario: Red/green orientation beacons on cranes, towers, and marine buoys operating 24/7 in wide ambient temperature ranges. IC Role / Device Role / Timing Role: Standalone current regulator with thermal coupling to heatsink; no microcontroller dependency. Use Value: Thermal foldback prevents LED degradation at 70 °C ambient; 150 °C junction limit ensures >50,000-hour lifetime under continuous load. | Use Scenario: Programmable machine vision illuminators requiring stable current during strobe pulses and variable intensity modes. IC Role / Device Role / Timing Role: Current source synchronized to camera trigger via EN pin; supports 1 kHz PWM with 5% min duty cycle. Use Value: 10 μs turn-on ensures full LED intensity within first 100 ns of trigger-critical for sub-millisecond exposure capture. |
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 |
|---|---|---|---|
| AL8862SP-13 | Switching buck topology; higher efficiency (>90%) but requires inductor and generates EMI; 100 mA max, 5–60 V input | Suitable for battery-powered portable lights where efficiency >85% is mandatory; not EMI-sensitive environments | Select when input voltage exceeds 27 V or thermal dissipation >500 mW is unacceptable |
| NSIC2020BT1G | Two-terminal linear LED driver; no EN or Vsense pins; fixed 200 mA, 5–40 V; no PWM dimming or thermal foldback | Used in simple AC-driven indicator lamps; lacks programmability and protection features | Select only for cost-driven, non-dimmable, non-thermal-critical applications with fixed current demand |
Compared with AL8862SP-13 and NSIC2020BT1G, BCR450E6327HTSA1 uniquely balances precision (±3%), thermal intelligence (foldback + shutdown), and minimal BOM count in a 2.9 mm footprint-making it optimal for thermally constrained, EMI-sensitive, and dimmable mid-power LED systems.
Availability
BCR450E6327HTSA1 is available at Aetrix Electronics and suitable for architectural lighting, transportation lighting, and signal/marker light applications requiring stable component supply, consistent current accuracy, and long-term lifecycle support.
Supply support for BCR450E6327HTSA1 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, and sensor solutions, with global R&D and manufacturing infrastructure.
The BCR450 belongs to Infineon's Power & Sensor Systems LED driver family, engineered for high-accuracy, thermally robust, and EMI-free constant-current regulation in general-purpose and industrial lighting applications-not qualified to AEC-Q100.
FAQ
What is the maximum allowable sense resistor value for 85 mA output?
The typical Vsense is 150 mV, so for 85 mA output, Rsense = 150 mV / 85 mA = 1.76 Ω. The datasheet specifies Vsense range of 135–165 mV, so Rsense must be selected between 1.59 Ω (135 mV / 85 mA) and 1.94 Ω (165 mV / 85 mA) to maintain accuracy. Standard 1.8 Ω ±1% resistor meets this requirement.
Can BCR450E6327HTSA1 drive multiple parallel LED strings?
No-BCR450 is a single-channel current sink. Driving parallel strings risks current imbalance due to Vf mismatches, leading to thermal runaway in one string. For multi-string operation, use one BCR450 per string or select a multi-channel driver like TPS92630. External transistor scaling applies per channel only.
Is thermal coupling to the LED required for foldback to function?
Thermal foldback activates based on die temperature (TJ), not LED temperature. However, the datasheet recommends thermally coupling the BCR450 to the LED heatsink to ensure TJ tracks LED junction temperature-enabling proactive current reduction before LED overheating occurs. Direct mounting improves foldback relevance by ~15 °C correlation.
Does the EN pin support analog dimming or only PWM?
The EN pin is strictly digital: it switches the output fully on or off. Analog dimming is not supported-the IC has no linear control mode. Dimming must be implemented via PWM at frequencies ≤1 kHz and ≥100 Hz, with minimum 5% duty cycle. Attempting analog voltage levels between UOff (0.35 V) and UOn (0.6 V) results in undefined output state.
BCR450E6327HTSA1 Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Infineon Technologies
- Series:
- -
- Package/Case:
- SC-74, SOT-457
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Obsolete
- Type:
- Linear
- Topology:
- -
- Internal Switch(s):
- Yes
- Number of Outputs:
- 1
- Voltage - Supply (Min):
- 8V
- Voltage - Supply (Max):
- 27V
- Voltage - Output:
- 6V
- Current - Output / Channel:
- 85mA
- Frequency:
- 1MHz
- Dimming:
- PWM
- Applications:
- Lighting, Signage
- Operating Temperature:
- -
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- PG-SC74-6
BCR450E6327HTSA1 FAQ
1.How can I place an order for BCR450E6327HTSA1 through Aetrix?
Please submit a Request for Quotation (RFQ) for BCR450E6327HTSA1 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 BCR450E6327HTSA1 reliable?
The price and inventory of BCR450E6327HTSA1 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for BCR450E6327HTSA1 is usually 5 days.
3.What payment methods are accepted for BCR450E6327HTSA1?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for BCR450E6327HTSA1 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for BCR450E6327HTSA1?
BCR450E6327HTSA1 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your BCR450E6327HTSA1 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 BCR450E6327HTSA1?
For technical support, including BCR450E6327HTSA1 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your BCR450E6327HTSA1 requirements.
6.How does Aetrix verify that BCR450E6327HTSA1 is sourced from the original manufacturer or authorized distributors?
All BCR450E6327HTSA1 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 BCR450E6327HTSA1 meets industry standards.
7.What is the process for return or replacement of BCR450E6327HTSA1?
All BCR450E6327HTSA1 units undergo pre-shipment inspection (PSI). If there is an issue with BCR450E6327HTSA1, 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 BCR450E6327HTSA1 part is unused and in its original packaging.
Return procedure for BCR450E6327HTSA1:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
BCR450E6327HTSA1 Tags
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