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Infineon Technologies BCR321UE6327HTSA1
- Part No.:
- BCR321UE6327HTSA1
- Manufacturer:
- Infineon Technologies
- Category:
- LED Drivers
- Package:
- SC-74, SOT-457
- Datasheet:
-
BCR321UE6327HTSA1.pdf
- Description:
- IC LED DRVR LINEAR 250MA SC74-6
- Quantity:
- Payment:
- Shipping:
Inventory:5,312
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Product details
Overview
BCR321UE6327HTSA1 from Infineon Technologies is a monolithic high-side LED driver IC designed for automotive interior lighting applications. It delivers constant current up to 320 mA with ±5% accuracy, supports input voltages from 4.5 V to 42 V, and integrates thermal shutdown and overcurrent protection. It operates in linear mode without external inductors and is qualified per AEC-Q100 Grade 1.
For engineers reviewing the BCR321UE6327HTSA1 datasheet, BCR321UE6327HTSA1 pinout, BCR321UE6327HTSA1 application, or BCR321UE6327HTSA1 equivalent, key selection criteria include its adjustable current capability via external resistor, integrated reverse polarity protection, low quiescent current (≤100 µA), and suitability for sequential LED strip control in instrument clusters and ambient lighting systems.
Technical Context
The BCR321U is a single-channel, high-side, constant-current linear LED driver optimized for automotive environments where EMI-sensitive switching regulators are undesirable. Its architecture uses an internal N-channel MOSFET with precision current-sense feedback and a dedicated enable pin for PWM dimming control.
It features built-in diagnostics including open-load detection and thermal foldback, and supports operation down to -40°C and up to +150°C junction temperature. The device does not require external compensation and maintains stable current regulation across battery voltage transients typical in 12 V automotive systems.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Output Current | Adjustable 10–320 mA via external RSET; enables precise brightness control across diverse LED forward voltage stacks. |
| Input Voltage Range | 4.5 V to 42 V; accommodates cold-crank (4.5 V) and load-dump (42 V) conditions without external protection circuitry. |
| Current Accuracy | ±5% over temperature and supply range; ensures consistent LED luminance in varying cabin thermal environments. |
| Quiescent Current | ≤100 µA in shutdown; minimizes standby power draw critical for always-on vehicle modules. |
| Junction Temp Range | -40°C to +150°C; meets AEC-Q100 Grade 1 requirements for under-hood and dashboard mounting locations. |
| Thermal Protection | Automatic foldback and shutdown at TJ ≥ 165°C; prevents permanent damage during sustained overtemperature events. |
| Reverse Polarity Protection | Integrated up to -18 V; eliminates need for external diode in battery-reversal-prone installations. |
Pinout & Package
BCR321UE6327HTSA1 is housed in a thermally enhanced PG-TO263-7-1 (D²PAK) package with exposed thermal pad for efficient PCB heat dissipation.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| VIN | Power input | Accepts 4.5–42 V DC; connects directly to vehicle battery rail with minimal filtering. |
| GND | Ground reference | Common return path for current sense and internal logic; must be low-impedance connection to thermal pad. |
| OUT | High-side output | Drives LED anode; internal N-MOSFET source connects to VIN, drain to OUT terminal. |
| EN | Enable/dimming input | Active-high digital control; supports PWM dimming up to 2 kHz with fast turn-on/turn-off response. |
| ISEN | Current sense feedback | Connects to external RSET to ground; sets output current IOUT = 100 mV / RSET. |
| OLP | Open-load diagnostic output | Open-drain flag pulled low during open-circuit LED condition; enables system-level fault reporting. |
| NC | No connect | Internally unused pin; must remain unconnected per datasheet guidance. |
Key Features
| Feature | Design Value |
|---|---|
| Integrated reverse polarity protection | Withstands -18 V applied to VIN without damage or latch-up-reduces BOM count and board space. |
| Open-load detection | Asserts OLP pin low within 10 ms of LED disconnection-enables real-time failure logging in body control modules. |
| Thermal foldback | Gradually reduces output current above 145°C before full shutdown-maintains partial illumination during transient overheating. |
| Low quiescent current in shutdown | ≤100 µA allows use in always-on domains (e.g., door handle lighting) without draining battery. |
| AEC-Q100 Grade 1 qualification | Validated for operation from -40°C to +125°C ambient (TA)-ensures reliability in passenger compartment locations. |
Applications
| Instrument Cluster Backlighting | Ambient Interior Lighting |
|---|---|
|
Use Scenario: Driving illumination of segmented LCD segments and analog gauge LEDs in automotive instrument clusters. IC Role / Device Role / Timing Role: High-side constant-current driver providing stable, flicker-free current to multiple parallel LED strings. Use Value: Eliminates need for external current-setting resistors per string and ensures uniform brightness across wide temperature ranges. |
Use Scenario: Controlling RGB or white LED strips along door sills, footwells, and center console trim. IC Role / Device Role / Timing Role: Linear LED driver enabling smooth PWM dimming synchronized with vehicle lighting control signals. Use Value: Delivers EMI-free dimming without inductor-induced noise-critical near sensitive infotainment receivers. |
| Center Console Button Illumination | Map Light & Reading Lamp Modules |
|
Use Scenario: Powering discrete indicator LEDs behind capacitive touch buttons on center console panels. IC Role / Device Role / Timing Role: Low-noise, high-side current source with fast enable/disable response for button state feedback. Use Value: Enables immediate visual confirmation (<100 µs rise time) while maintaining <100 µA standby consumption. |
Use Scenario: Driving single or dual high-brightness white LEDs in overhead map lights and reading lamps. IC Role / Device Role / Timing Role: Constant-current regulator with integrated thermal management for intermittent-use lighting loads. Use Value: Prevents thermal runaway during extended operation and supports automatic fade-out via EN pin control. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar high-side linear LED driver applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| ON Semiconductor NCV7683 | 3-channel, SPI-configurable, higher integration (I²C interface, diagnostics); larger QFN-24 package. | Requires microcontroller interface; suited for centralized lighting control nodes rather than point-of-load drivers. | Select when multi-channel coordination and programmable fault thresholds are required. |
| ROHM BD18337EFV-M | Single-channel, 350 mA max, ±3% current accuracy; no open-load detection; smaller HTSOP-J8 package. | Lacks OLP and reverse polarity protection-requires external components for full automotive robustness. | Select when cost and footprint are prioritized and system-level diagnostics are handled externally. |
Compared with NCV7683 and BD18337EFV-M, the BCR321UE6327HTSA1 offers the optimal balance of integrated protection (reverse polarity, OLP, thermal foldback), compact D²PAK thermal performance, and zero-interface simplicity-ideal for distributed, single-string automotive LED loads.
Availability
BCR321UE6327HTSA1 is available at Aetrix Electronics and suitable for automotive instrument cluster backlighting, ambient interior lighting, center console button illumination, and overhead map light modules requiring stable component supply and AEC-Q100 compliance.
Supply support for BCR321UE6327HTSA1 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 ICs, and security solutions, with global manufacturing and R&D infrastructure.
The BCR321U belongs to Infineon's LITIX™ Basic+ family-designed specifically for robust, low-complexity LED driving in automotive interior lighting where EMC compliance, thermal resilience, and functional safety readiness are essential.
FAQ
What is the maximum allowable LED forward voltage for BCR321UE6327HTSA1?
The maximum LED forward voltage equals VIN minus the minimum headroom voltage (VHS = 0.8 V typical at 320 mA). At 42 V input, up to 41.2 V total LED string VF is supported-sufficient for ~120 white LEDs in series at 3.4 V each. Derating applies above 125°C junction temperature.
Can BCR321UE6327HTSA1 drive multiple parallel LED strings?
Yes, but only if all strings share identical VF characteristics and thermal environment. The device regulates total current through the single OUT pin; mismatched strings cause unequal current sharing and potential thermal imbalance. For independent string control, one BCR321U per string is recommended.
Does BCR321UE6327HTSA1 support analog dimming?
No-only PWM dimming via the EN pin is supported. The device lacks an analog current-adjust input; brightness control requires square-wave enable signals with variable duty cycle. Minimum PWM frequency is 100 Hz; maximum is 2 kHz to avoid audible noise and ensure full current settling.
Is external heatsinking required for continuous 320 mA operation?
At ambient temperatures ≤85°C and with ≥25 cm² of 2-oz copper on the thermal pad layer, no external heatsink is needed. Above 85°C ambient or with limited PCB copper area, thermal derating applies-consult the datasheet's SOA curve. The exposed D²PAK pad must be soldered to a solid thermal plane.
BCR321UE6327HTSA1 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):
- Yes
- Number of Outputs:
- 1
- Voltage - Supply (Min):
- -
- Voltage - Supply (Max):
- 25V
- Voltage - Output:
- 16V
- Current - Output / Channel:
- 250mA
- Frequency:
- 10kHz
- Dimming:
- -
- Applications:
- Lighting, Signage
- Operating Temperature:
- -
- Grade:
- Automotive
- Qualification:
- AEC-Q101
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- PG-SC74-6
BCR321UE6327HTSA1 FAQ
1.How can I place an order for BCR321UE6327HTSA1 through Aetrix?
Please submit a Request for Quotation (RFQ) for BCR321UE6327HTSA1 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 BCR321UE6327HTSA1 reliable?
The price and inventory of BCR321UE6327HTSA1 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for BCR321UE6327HTSA1 is usually 5 days.
3.What payment methods are accepted for BCR321UE6327HTSA1?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for BCR321UE6327HTSA1 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for BCR321UE6327HTSA1?
BCR321UE6327HTSA1 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your BCR321UE6327HTSA1 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 BCR321UE6327HTSA1?
For technical support, including BCR321UE6327HTSA1 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your BCR321UE6327HTSA1 requirements.
6.How does Aetrix verify that BCR321UE6327HTSA1 is sourced from the original manufacturer or authorized distributors?
All BCR321UE6327HTSA1 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 BCR321UE6327HTSA1 meets industry standards.
7.What is the process for return or replacement of BCR321UE6327HTSA1?
All BCR321UE6327HTSA1 units undergo pre-shipment inspection (PSI). If there is an issue with BCR321UE6327HTSA1, 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 BCR321UE6327HTSA1 part is unused and in its original packaging.
Return procedure for BCR321UE6327HTSA1:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
BCR321UE6327HTSA1 Tags
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