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Nexperia USA Inc. NCR401UX
- Part No.:
- NCR401UX
- Manufacturer:
- Nexperia USA Inc.
- Category:
- LED Drivers
- Package:
- SC-74, SOT-457
- Datasheet:
-
NCR401UX.pdf
- Description:
- IC LED DRIVER LINEAR 10MA 6TSOP
- Quantity:
- Payment:
- Shipping:
Inventory:9,386
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Product details
Overview
NCR401UX from Nexperia is a resistor-equipped PNP transistor LED driver with integrated dual diodes in a 6-pin SOT457 (SC-74/TSOP6) package, delivering stabilized 10 mA output current with 1.4 V voltage overhead, ±15% current accuracy over supply variation, and AEC-Q101 qualification for automotive use.
For engineers reviewing the NCR401UX datasheet, NCR401UX pinout, NCR401UX application, or NCR401UX equivalent, this device serves as a compact constant-current source for LED biasing, automotive interior lighting, and generic current regulation where low component count, thermal robustness (750 mW max power dissipation), and supply voltage insensitivity are critical.
Technical Context
The NCR401UX integrates a precision current-regulating PNP transistor with on-chip current-setting resistors and two protection diodes-enabling stable 10 mA output without external feedback components. Its internal architecture eliminates need for external sense resistors or op-amps.
It operates with supply voltages up to 40 V and maintains output current stability across ambient temperatures (−40 °C to +150 °C) and supply variations (ΔIout/Iout·ΔVS = 0.8 %/V), while supporting adjustable current up to 65 mA via external REXT on Pin 6.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Output current | 10 mA (stabilized, ±15% tolerance at VS = 10 V, Vout = 8.6 V) |
| Supply voltage range | Up to 40 V (supports 12 V/24 V automotive systems with margin) |
| Voltage overhead | 1.4 V (minimum VS − Vout required to maintain regulation) |
| Thermal power dissipation | 750 mW (on 4-layer FR4 PCB, standard footprint) |
| Current temperature drift | −0.3 %/K (ensures brightness stability across vehicle cabin temperature ranges) |
| External adjustability | Yes - REXT on Pin 6 enables output current scaling from 10 mA to 65 mA |
| AEC-Q101 qualified | Yes - certified for automotive discrete semiconductor stress testing |
Pinout & Package
Package: SOT457 (SC-74 / TSOP6), plastic surface-mounted, 6-lead, 1.1 mm height, 3.1 × 2.7 mm footprint, optimized for automated assembly and thermal performance on FR4 PCBs.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 | GND | Ground reference for internal current mirror and diode clamping network |
| 2 | IOUT | Primary current output terminal (anode-side connection for LED string) |
| 3 | IOUT | Secondary current output terminal - paralleled with Pin 2 for higher current handling or layout flexibility |
| 4 | VS | Positive supply input - powers internal PNP regulator and bias circuitry |
| 5 | IOUT | Third current output terminal - enables triple-terminal output routing for balanced thermal distribution |
| 6 | REXT | External resistor connection point - sets adjustable output current (10–65 mA) by modulating internal reference |
Key Features
| Feature | Design Value |
|---|---|
| Integrated current regulation | Eliminates external sense resistor and feedback loop - reduces BOM count by ≥2 components |
| Low voltage overhead | 1.4 V headroom enables operation with minimal dropout in 12 V systems driving white LEDs (VF ≈ 10.6 V) |
| Dual-diode protection | On-chip diodes provide reverse-polarity and transient suppression - no external TVS needed in basic automotive layouts |
| Thermal robustness | Rated for 150 °C junction temperature and 750 mW dissipation on 4-layer PCB - supports under-hood placement |
| AEC-Q101 qualification | Validated for automotive-grade reliability including HTGB, HTRB, and ESD (HBM > 2 kV) |
Applications
| Automotive Interior Lighting | Dashboard Backlighting |
|---|---|
|
Use Scenario: Driving multiple white or amber LEDs in door courtesy lights, map lamps, and footwell illumination. IC Role / Device Role / Timing Role: Constant-current source regulating LED string current independent of battery voltage fluctuations (9–16 V). Use Value: Ensures consistent LED brightness across cold-crank (6.5 V) to load-dump (36 V) conditions without external compensation. |
Use Scenario: Powering segmented edge-lit LCD backlights in instrument clusters and center displays. IC Role / Device Role / Timing Role: Precision current sink enabling uniform luminance across parallel LED strings. Use Value: Maintains <±5% current matching between strings without trimming resistors, reducing calibration effort. |
| Industrial Status Indicators | White Goods Control Panel LEDs |
|
Use Scenario: Illuminating status LEDs on PLC I/O modules and motor drives operating in wide-temperature industrial enclosures. IC Role / Device Role / Timing Role: Temperature-stable current source compensating for ambient shifts from −40 °C to +85 °C. Use Value: Prevents LED dimming or overdrive due to thermal drift - eliminates need for thermistor-based compensation. |
Use Scenario: Driving front-panel indicator LEDs in refrigerators, ovens, and washing machines exposed to humidity and thermal cycling. IC Role / Device Role / Timing Role: Robust current regulator with integrated reverse-voltage protection (diodes) and moisture-resistant SOT457 package. Use Value: Eliminates field failures from accidental reverse-battery connection or condensation-induced leakage paths. |
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 |
|---|---|---|---|
| NCR402UX | Stabilized 20 mA output (vs. 10 mA); same package, pinout, and REXT adjustability | Better suited for higher-brightness indicators requiring >15 mA per LED | Select when target current exceeds 12 mA and board space prohibits paralleling NCR401UX units |
| NSI45020AZT1G | 20 mA fixed current; wider supply range (4.5–45 V); no REXT pin; SOD-123FL package | Lacks multi-output pins and thermal derating headroom (max 500 mW) | Prefer for cost-sensitive, single-LED applications where 20 mA suffices and thermal margin is not critical |
Compared with NCR401UX, NCR402UX offers double the base current rating in identical form factor and adjustability, while NSI45020AZT1G trades thermal capability and pin flexibility for lower unit cost and smaller footprint - making NCR401UX optimal for multi-LED, thermally constrained, or AEC-Q101–mandated designs.
Availability
NCR401UX is available at Aetrix Electronics and suitable for automotive interior lighting, dashboard backlighting, industrial status indicators, and white goods control panel LEDs requiring stable component supply, AEC-Q101 compliance, and thermal resilience.
Supply support for NCR401UX 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-volume discrete, logic, and PowerMOS semiconductors, spun off from NXP in 2017 and focused on automotive, industrial, computing, and consumer markets.
The NCR401UX belongs to Nexperia's resistor-equipped transistor (RET) family, engineered specifically for simplified, reliable constant-current LED driving in harsh environments without external regulation circuitry.
FAQ
Can NCR401UX drive multiple LEDs in series?
Yes - it supports series-connected LEDs as long as the total forward voltage (VF) remains ≤ (VS − 1.4 V). At VS = 12 V, up to three white LEDs (VF ≈ 3.2 V each) can be driven reliably. The 1.4 V overhead ensures regulation even during low-battery conditions.
What is the function of the three IOUT pins (2, 3, and 5)?
Pins 2, 3, and 5 are internally paralleled output terminals - they share the same current path and are provided to reduce current density per bond wire, improve thermal spreading across the package, and simplify PCB layout for high-reliability automotive traces. They must be connected together externally.
How does REXT on Pin 6 adjust the output current?
REXT forms a voltage divider with an internal reference, altering the bias on the internal PNP current mirror. Using REXT = 15 Ω yields ~65 mA; REXT = open yields 10 mA. Values between are linearly interpolated per Figure 8 in the datasheet - no recalibration is needed.
Is thermal derating required above 25 °C ambient?
Yes - power dissipation must be linearly derated above 25 °C using the curve in Figure 1. At 85 °C ambient, maximum allowable Ptot drops to ~475 mW on a 4-layer PCB. Layout with ≥1 cm² copper pour under Pins 2/3/5 significantly improves thermal performance.
NCR401UX 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:
- 10mA
- Frequency:
- -
- Dimming:
- -
- Applications:
- -
- Operating Temperature:
- -55°C ~ 150°C (TA)
- Grade:
- Automotive
- Qualification:
- AEC-Q101
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- 6-TSOP
NCR401UX FAQ
1.How can I place an order for NCR401UX through Aetrix?
Please submit a Request for Quotation (RFQ) for NCR401UX 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 NCR401UX reliable?
The price and inventory of NCR401UX are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for NCR401UX is usually 5 days.
3.What payment methods are accepted for NCR401UX?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for NCR401UX transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for NCR401UX?
NCR401UX orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your NCR401UX 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 NCR401UX?
For technical support, including NCR401UX datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your NCR401UX requirements.
6.How does Aetrix verify that NCR401UX is sourced from the original manufacturer or authorized distributors?
All NCR401UX 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 NCR401UX meets industry standards.
7.What is the process for return or replacement of NCR401UX?
All NCR401UX units undergo pre-shipment inspection (PSI). If there is an issue with NCR401UX, 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 NCR401UX part is unused and in its original packaging.
Return procedure for NCR401UX:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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