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Nexperia USA Inc. NCR405UX
- Part No.:
- NCR405UX
- Manufacturer:
- Nexperia USA Inc.
- Category:
- LED Drivers
- Package:
- SC-74, SOT-457
- Datasheet:
-
NCR405UX.pdf
- Description:
- IC LED DRIVER LINEAR 50MA 6TSOP
- Quantity:
- Payment:
- Shipping:
Inventory:6,716
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Product details
Overview
NCR405UX from Nexperia is a resistor-equipped PNP transistor-based constant-current LED driver with integrated diodes, designed for automotive and industrial LED biasing in SOT457 (SC-74) package. It delivers stabilized 50 mA output current with ±8 mA tolerance at 10 V supply, 1.4 V low voltage overhead, and AEC-Q101 qualification for under-hood use.
For engineers reviewing the NCR405UX datasheet, NCR405UX pinout, NCR405UX application, or NCR405UX equivalent, this device serves as a compact, thermally robust, single-chip alternative to discrete current-source designs-especially where board space, thermal margin, and automotive-grade reliability are critical selection criteria.
Technical Context
The NCR405UX integrates a precision current-regulating PNP transistor with two on-die diodes and internal current-setting resistors. Its regulation relies on emitter-degeneration feedback and temperature-compensated bandgap reference circuitry to maintain stable output despite supply variation (±1 %/V) and ambient drift (−0.3 %/K).
It operates as a high-side constant-current sink: VS supplies power, IOUT pins drive LED anodes (or load), GND completes the path, and REXT adjusts current up to 65 mA. Thermal derating follows standard FR4 PCB mounting profiles, with max junction temperature limited to 150 °C.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Stabilized Output Current | 50 mA (typical), 42–58 mA (min–max); ensures consistent LED brightness across production units and operating conditions. |
| Supply Voltage Range | Up to 40 V; supports 12 V/24 V automotive systems with headroom for transients and ripple. |
| Minimum Supply Overhead | 1.4 V (VS − VOUT); enables operation with minimal voltage drop, critical for low-Vf LEDs or stacked configurations. |
| Ground Current | 340–500 µA (typical); low quiescent draw preserves system efficiency in always-on lighting modules. |
| Internal Resistance | 12–21 Ω; sets base-emitter bias and contributes to current stability and thermal response. |
| Power Dissipation (4-layer PCB) | 750 mW (max); defines thermal design envelope for continuous operation at full current on standard industrial PCBs. |
| Ambient Temperature Range | −55 °C to +150 °C; validated for under-hood automotive environments per AEC-Q101 stress testing. |
Pinout & Package
SOT457 (SC-74 / TSOP6) plastic surface-mount package: 6-pin, 1.7 mm × 2.7 mm footprint, 1.1 mm height, with exposed pad for thermal enhancement.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 | GND | Reference ground node; connects to PCB ground plane for bias stability and thermal conduction. |
| 2, 3, 5 | IOUT | Parallel output terminals carrying regulated current to LED anode or load; reduce trace resistance and improve current sharing. |
| 4 | VS | Positive supply input; must be decoupled near pin to suppress switching noise and support transient immunity. |
| 6 | REXT | External resistor connection point; adjusts output current from 50 mA to 65 mA via precision value selection. |
Key Features
| Feature | Design Value |
|---|---|
| Integrated current regulation | Eliminates need for external sense resistor and op-amp, reducing BOM count by ≥3 components and PCB area by >30 %. |
| AEC-Q101 qualification | Validated for automotive Grade 1 (−40 °C to +125 °C ambient) operation, including HTOL, TC, and ESD testing. |
| Low thermal resistance | Rth(j-a) = 115 K/W (4-layer PCB); enables 50 mA continuous drive without heatsink in compact enclosures. |
| Adjustable output current | REXT pin supports fine-tuning from 50 mA to 65 mA using standard 1 % tolerance resistors (e.g., 56 Ω → ~58 mA). |
| High current accuracy vs. supply | ΔIout/Iout = ±1 % per volt change in VS; maintains brightness uniformity across battery voltage swing (9–16 V). |
Applications
| Automotive Interior Lighting | Industrial Status Indicators |
|---|---|
|
Use Scenario: Illuminating dashboard backlighting, door courtesy lights, and HVAC status LEDs in passenger vehicles. IC Role / Device Role / Timing Role: High-side constant-current sink regulating individual or parallel LED strings. Use Value: Maintains consistent luminance over battery voltage fluctuations (9–16 V) and ambient temperature (−40 °C to +85 °C), meeting OEM photometric specs. |
Use Scenario: Driving panel-mounted status LEDs on PLC I/O modules, HMI front panels, and factory automation controllers. IC Role / Device Role / Timing Role: Precision current source ensuring stable LED intensity across varying 24 V DC supply rails and industrial thermal cycling. Use Value: Reduces calibration effort and eliminates current drift-induced false-status reporting during long-term operation. |
| Commercial Vehicle Marker Lights | White Goods Indicator Modules |
|
Use Scenario: Powering red/amber marker and side-marker LEDs on trucks, buses, and agricultural equipment. IC Role / Device Role / Timing Role: Robust current regulator tolerant of load dump transients and wide ambient extremes (−40 °C to +105 °C). Use Value: Meets SAE J1455 vibration and thermal shock requirements without external protection circuitry. |
Use Scenario: Biasing indicator LEDs on washing machines, refrigerators, and dishwashers with 12 V or 24 V internal supplies. IC Role / Device Role / Timing Role: Compact, solder-reflow compatible current source enabling ultra-thin front-panel designs. Use Value: Enables 0.5 mm PCB thickness compatibility and eliminates thermal runaway risk in sealed plastic housings. |
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 |
|---|---|---|---|
| NCR406UX | 65 mA nominal output current; identical pinout and package; higher Rint (18–25 Ω) and slightly increased Voverhead (1.5 V). | Better suited for higher-brightness LEDs requiring >55 mA; same thermal profile but lower current accuracy (±10 % vs. ±8 %). | Select when target current exceeds 55 mA and tighter tolerance is not required. |
| NSI45020AZT1G | ON Semiconductor adjustable current regulator; 20–60 mA range; 1.7 V overhead; SOIC-8 package; no AEC-Q101 rating. | Larger footprint and lower thermal performance (Rth(j-a) ≈ 180 K/W); suitable for non-automotive industrial use only. | Choose for cost-sensitive non-automotive designs where AEC-Q101 is not mandated. |
Compared with NCR405UX, NCR406UX offers higher base current but reduced accuracy, while NSI45020AZT1G trades automotive qualification and thermal efficiency for wider current adjustability and legacy SOIC compatibility.
Availability
NCR405UX is available at Aetrix Electronics and suitable for automotive interior lighting, industrial status indicators, commercial vehicle marker lights, and white goods indicator modules requiring stable component supply, AEC-Q101 compliance, and compact thermal management.
Supply support for NCR405UX 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
Nexperia is a global leader in high-performance discrete, logic, and power MOSFET semiconductors, spun off from NXP in 2017 and headquartered in Nijmegen, Netherlands.
The NCR series targets automotive and industrial LED biasing with integrated, AEC-Q101 qualified constant-current drivers that replace multi-component solutions while maintaining thermal resilience and supply robustness.
FAQ
Can NCR405UX drive multiple LEDs in series?
Yes-NCR405UX can drive series-connected LEDs as long as the total forward voltage (Vf) remains ≤ (VS − 1.4 V). At VS = 12 V, up to three standard white LEDs (3.2 V each) are supported. The device regulates current regardless of Vf variation, provided VOUT stays within its 38 V absolute maximum rating.
What is the recommended REXT value to achieve 60 mA output?
A 68 Ω ±1 % resistor between Pin 6 (REXT) and GND yields approximately 60 mA output, based on the linear adjustment curve in Figure 8 of the datasheet. This value accounts for typical process variation and maintains stability across −40 °C to +85 °C ambient.
Does NCR405UX require external capacitors for stability?
No-NCR405UX is internally compensated and operates stably without external capacitors. However, a 100 nF ceramic capacitor between VS and GND, placed within 2 mm of the package, is recommended to suppress high-frequency supply noise and improve transient response during PWM dimming.
How does thermal derating affect maximum continuous current at 100 °C ambient?
At Tamb = 100 °C on a 4-layer FR4 PCB, the device's usable power dissipation drops to ~375 mW (per Fig 1 derating curve), limiting continuous IOUT to approximately 32 mA to stay within safe junction temperature (150 °C). Forced airflow or copper pour expansion restores full 50 mA capability.
NCR405UX Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Nexperia USA Inc.
- 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):
- 40V
- Voltage - Output:
- 38V
- Current - Output / Channel:
- 50mA
- Frequency:
- -
- Dimming:
- -
- Applications:
- -
- Operating Temperature:
- -55°C ~ 150°C (TA)
- Grade:
- Automotive
- Qualification:
- AEC-Q101
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- 6-TSOP
NCR405UX FAQ
1.How can I place an order for NCR405UX through Aetrix?
Please submit a Request for Quotation (RFQ) for NCR405UX 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 NCR405UX reliable?
The price and inventory of NCR405UX are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for NCR405UX is usually 5 days.
3.What payment methods are accepted for NCR405UX?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for NCR405UX transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for NCR405UX?
NCR405UX orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your NCR405UX 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 NCR405UX?
For technical support, including NCR405UX datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your NCR405UX requirements.
6.How does Aetrix verify that NCR405UX is sourced from the original manufacturer or authorized distributors?
All NCR405UX 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 NCR405UX meets industry standards.
7.What is the process for return or replacement of NCR405UX?
All NCR405UX units undergo pre-shipment inspection (PSI). If there is an issue with NCR405UX, 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 NCR405UX part is unused and in its original packaging.
Return procedure for NCR405UX:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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