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Infineon Technologies BCR430UXTSA2
- Part No.:
- BCR430UXTSA2
- Manufacturer:
- Infineon Technologies
- Category:
- LED Drivers
- Package:
- SOT-23-6
- Datasheet:
-
BCR430UXTSA2.pdf
- Description:
- IC LED DRV LIN PWM 100MA SOT23-6
- Quantity:
- Payment:
- Shipping:
Inventory:11,637
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Product details
Overview
BCR430UXTSA2 from Infineon Technologies is a linear constant-current LED driver IC in PG-SOT23-6 package, regulating up to 100 mA LED current with ±5 % precision at 95 mA, 135 mV typical saturation voltage at 50 mA, and 6–42 V supply range. It operates standalone without external power transistor and integrates smart overtemperature protection for thermal safety in architectural lighting and LED strips.
For engineers reviewing the BCR430UXTSA2 datasheet, BCR430UXTSA2 pinout, BCR430UXTSA2 application, or BCR430UXTSA2 equivalent, key selection criteria include low-voltage-drop operation (≤200 mV), Rset-based current programming, thermal foldback behavior, and industrial qualification per JEDEC47/20/22.
Technical Context
The BCR430UXTSA2 implements a precision current generator topology where LED current is set by an external resistor (Rset) connected to the RS pin, with a fixed 520:1 current gain ratio between RS output current and LED sink current. Its internal bandgap reference and bias generator ensure stable regulation across supply and temperature variations.
Thermal protection is implemented via junction-temperature-dependent reduction of RS pin voltage - not shutdown - enabling continuous dimming under overload while maintaining system reliability. Power dissipation is limited to 600 mW on JESD 51-7 board, with thermal resistance junction-to-ambient ranging from 182 K/W (with 300 mm² GND cooling area) to 288 K/W (no extra copper).
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Supply Voltage Range | 6 V to 42 V - supports wide-input industrial DC bus systems without pre-regulation |
| LED Output Current | Up to 100 mA - sufficient for medium-brightness LED strings or multi-LED arrays |
| Saturation Voltage | Typ. 135 mV at 50 mA - minimizes power loss and enables higher LED forward voltage headroom |
| Current Accuracy | ±5 % at 95 mA - ensures consistent luminance across production units without calibration |
| RS Pin Voltage | 1.20 V ±0.04 V - sets precise Rset-based current scaling with low sensitivity to supply variation |
| Thermal Protection | Gradual current foldback starting ~120 °C - avoids abrupt LED flicker or system reset during thermal stress |
| ESD Robustness | 4 kV HBM (all pins except VS), 5 kV HBM (VS pin) - withstands handling and board-level ESD events |
Pinout & Package
BCR430UXTSA2 is housed in PG-SOT23-6 package - a thermally enhanced variant of SOT-23 with exposed thermal pad on underside for PCB heat sinking. Pin 2 (GND) serves as primary thermal and electrical reference connection.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 N.C. | No connect | Internally unconnected; must remain floating or grounded per layout guidelines |
| 2 GND | Ground & thermal path | Primary return path and main thermal interface to PCB copper pour |
| 3 RS | Current-setting reference output | Sinks precise current proportional to LED current (ratio ≈ 520:1); connects to Rset |
| 4 VS | Positive supply input | Accepts 6–42 V; includes 5 kV HBM ESD protection |
| 5 N.C. | No connect | Internally unconnected; must remain floating or grounded per layout guidelines |
| 6 LED | LED cathode current sink | Sinks regulated current to LED anode; voltage drop ≤200 mV at full load |
Key Features
| Feature | Design Value |
|---|---|
| Low saturation voltage | ≤200 mV at 50 mA - reduces power loss and improves efficiency in high-VF LED chains |
| Rset-based current programming | External resistor sets LED current with predictable 520:1 gain - eliminates need for DAC or microcontroller |
| Smart thermal foldback | Continuous current reduction above ~120 °C - maintains light output while preventing thermal runaway |
| Industrial qualification | JEDEC47/20/22 compliant - validated for extended temperature cycling, humidity, and bias life testing |
| High ESD immunity | 5 kV HBM on VS pin - protects against assembly and field-induced transients |
Applications
| Architectural Lighting | LED Channel Letters |
|---|---|
Use Scenario: Linear LED modules mounted on building façades requiring uniform brightness and long-term thermal stability. IC Role / Device Role / Timing Role: Constant-current sink regulating individual LED segments independent of VF drift and ambient temperature. Use Value: 135 mV saturation voltage preserves ≥3.5 V headroom for 3–4 white LEDs in series at 24 V supply. | Use Scenario: Illuminated signage with narrow-profile aluminum housings where thermal dissipation is constrained. IC Role / Device Role / Timing Role: Standalone LED current controller eliminating discrete transistor + sense resistor solution. Use Value: PG-SOT23-6 package with thermal pad enables direct mounting to extruded heatsink, sustaining 100 mA continuously at TA = 60 °C. |
| Retail Display Lighting | LED Strip Drivers |
Use Scenario: Adjustable-brightness accent lighting in retail shelving, powered from 24 V DC rails. IC Role / Device Role / Timing Role: Fixed-current regulator with Rset tuning for binning-compensated luminance matching. Use Value: ±5 % current accuracy at 95 mA ensures <2 % luminance variance across 1000+ units without post-production trimming. | Use Scenario: Flexible LED tape installations with long trace runs susceptible to inductive noise coupling. IC Role / Device Role / Timing Role: LED current sink with integrated 10 nF ceramic capacitor recommendation at LED pin for EMI suppression. Use Value: Low 200 mV dropout allows stable operation even with 1.2 V line drop over 2 m PCB traces at 100 mA. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar linear LED driver applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| AL8862SP-13 | Switching buck architecture; requires external inductor & diode; 30 V max input; ±3 % current accuracy | Better efficiency >85 % at 100 mA but larger footprint and higher EMI risk | Select when input voltage exceeds 42 V or thermal budget is extremely tight |
| NSI45020AZT1G | Two-terminal constant-current regulator; no RS pin or external resistor; fixed 20 mA output; 40 V max | Simpler layout but non-adjustable current and lower max output | Select for cost-sensitive, single-current LED indicator designs with no tuning requirement |
Compared with AL8862SP-13 and NSI45020AZT1G, BCR430UXTSA2 uniquely balances adjustability (via Rset), low dropout, industrial qualification, and compact PG-SOT23-6 packaging - making it optimal for thermally constrained, medium-current architectural and signage applications where simplicity and reliability outweigh peak efficiency needs.
Availability
BCR430UXTSA2 is available at Aetrix Electronics and suitable for architectural lighting, LED channel letters, and retail display lighting requiring stable component supply, long-lifecycle support, and JEDEC-qualified reliability.
Supply support for BCR430UXTSA2 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, and industrial control ICs, with global manufacturing and quality certification to ISO/TS 16949 and IECQ QC 080000.
BCR430UXTSA2 belongs to Infineon's BCR family of linear LED drivers designed specifically for cost-effective, thermally robust, and easy-to-integrate constant-current solutions in commercial and industrial solid-state lighting.
FAQ
What is the maximum allowable LED forward voltage when using BCR430UXTSA2 at 24 V supply?
The maximum LED forward voltage is determined by subtracting the saturation voltage (≤200 mV) from the supply voltage. At 24 V, up to 23.8 V is available for the LED string. This supports configurations such as 7× white LEDs (VF ≈ 3.4 V each) or 5× high-VF red/orange LEDs (VF ≈ 4.7 V each), assuming worst-case tolerance stacking and thermal derating.
Can BCR430UXTSA2 drive multiple parallel LED strings?
No - BCR430UXTSA2 is a single-channel constant-current sink and must be used per LED string to ensure matched current distribution. Driving parallel strings from one IC causes current imbalance due to VF mismatch, potentially leading to thermal runaway in the lowest-VF string. Use one BCR430UXTSA2 per string or select a multi-channel driver IC.
How does the smart overtemperature protection behave during sustained high-temperature operation?
BCR430UXTSA2 reduces LED current gradually as junction temperature rises above ~120 °C, reaching ~30 % of nominal current at 160 °C. It never shuts off completely, preserving minimal illumination while limiting power dissipation. Recovery is automatic upon cooling; no latch or reset is required, ensuring seamless operation in intermittently overheated enclosures.
Is an external capacitor required at the LED pin, and why?
Yes - a 10 nF ceramic capacitor placed directly between the LED pin and GND is recommended for installations with long PCB traces (>15 cm) or cable runs. It suppresses high-frequency ringing caused by parasitic inductance interacting with LED junction capacitance, preventing electromagnetic interference and potential false triggering of downstream sensors or communication lines.
BCR430UXTSA2 Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Infineon Technologies
- Series:
- -
- Package/Case:
- SOT-23-6
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Active
- Type:
- Linear
- Topology:
- Constant Current
- Internal Switch(s):
- No
- Number of Outputs:
- 1
- Voltage - Supply (Min):
- 6V
- Voltage - Supply (Max):
- 42V
- Voltage - Output:
- 42V
- Current - Output / Channel:
- 100mA
- Frequency:
- -
- Dimming:
- PWM
- Applications:
- LED Lighting
- Operating Temperature:
- -40°C ~ 150°C (TJ)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- PG-SOT23-6-1
BCR430UXTSA2 FAQ
1.How can I place an order for BCR430UXTSA2 through Aetrix?
Please submit a Request for Quotation (RFQ) for BCR430UXTSA2 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 BCR430UXTSA2 reliable?
The price and inventory of BCR430UXTSA2 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for BCR430UXTSA2 is usually 5 days.
3.What payment methods are accepted for BCR430UXTSA2?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for BCR430UXTSA2 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for BCR430UXTSA2?
BCR430UXTSA2 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your BCR430UXTSA2 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 BCR430UXTSA2?
For technical support, including BCR430UXTSA2 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your BCR430UXTSA2 requirements.
6.How does Aetrix verify that BCR430UXTSA2 is sourced from the original manufacturer or authorized distributors?
All BCR430UXTSA2 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 BCR430UXTSA2 meets industry standards.
7.What is the process for return or replacement of BCR430UXTSA2?
All BCR430UXTSA2 units undergo pre-shipment inspection (PSI). If there is an issue with BCR430UXTSA2, 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 BCR430UXTSA2 part is unused and in its original packaging.
Return procedure for BCR430UXTSA2:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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