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Nexperia USA Inc. NCR402UH
- Part No.:
- NCR402UH
- Manufacturer:
- Nexperia USA Inc.
- Category:
- LED Drivers
- Package:
- SC-74, SOT-457
- Datasheet:
-
NCR402UH.pdf
- Description:
- IC LED DRIVER LINEAR 20MA 6TSOP
- Quantity:
- Payment:
- Shipping:
Inventory:4,958
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Product details
Overview
NCR402UH 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 a stabilized 20 mA output current with ±3 mA tolerance at 10 V supply and 8.6 V output, features 1.4 V low voltage overhead, AEC-Q101 qualification, and supports external resistor adjustment up to 65 mA.
For engineers reviewing the NCR402UH datasheet, NCR402UH pinout, NCR402UH application, or NCR402UH equivalent, this device serves as a compact, thermally robust, single-chip solution for stable LED current regulation where board space, component count, and automotive-grade reliability are critical design constraints.
Technical Context
The NCR402UH integrates a precision current-regulating PNP transistor with on-die diodes and internal resistance (Rint = 42 Ω typ), enabling self-regulated output without external feedback. Its operation relies on fixed internal current-setting architecture, not PWM or switching control, delivering analog constant-current sourcing across varying load voltages.
Thermal performance is defined by junction-to-ambient thermal resistance (Rth(j-a) = 115 K/W min on 4-layer FR4), supporting continuous 750 mW power dissipation at 25 °C ambient. Output current exhibits −0.3 %/K temperature coefficient and 0.8 %/V supply sensitivity, ensuring stability under real-world operating conditions.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Stabilized IOUT | 20 mA ±3 mA (typical accuracy over VS = 10 V, VOUT = 8.6 V; enables consistent LED brightness without trimming) |
| Voltage overhead | 1.4 V (minimum VS − VOUT required for regulation; allows operation with low-drop LED strings) |
| Max supply voltage | 40 V (supports 24 V automotive systems with margin; withstands load-dump transients up to specified limits) |
| Adjustable IOUT range | 20–65 mA (via external REXT on Pin 6; enables flexible LED string configuration without redesign) |
| Power dissipation | 750 mW (on 4-layer FR4 PCB; defines maximum continuous thermal load before derating) |
| AEC-Q101 qualified | Yes (certified for automotive discrete semiconductors; validates reliability for under-hood and cabin lighting) |
| Junction temperature | 150 °C max (enables operation in high-ambient environments such as headlamp modules or dashboard displays) |
Pinout & Package
SOT457 (SC-74 / TSOP6) plastic surface-mounted package: 6-pin, 1.7 mm × 2.7 mm footprint, 0.95 mm pitch, 1.1 mm height; optimized for automated assembly and thermal conduction via exposed pad-compatible layout.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 | GND | Ground reference for internal bias network and current sensing; must be low-impedance connection to minimize ground bounce |
| 2, 3, 5 | IOUT | Parallel-connected output terminals for high-current capability and reduced trace resistance; share 20 mA nominal load |
| 4 | VS | Main supply input; decoupling capacitor recommended within 5 mm to suppress supply ripple and transient coupling |
| 6 | REXT | External resistor connection point for IOUT adjustment; sets current via voltage drop across internal Rint; open = 20 mA default |
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% vs discrete solutions |
| Low 1.4 V overhead | Enables use with 2–3 white LEDs in series (VF ≈ 3.0–3.4 V each) from 12 V rail while maintaining regulation margin |
| AEC-Q101 qualification | Validated for automotive temperature cycling (−40 °C to +125 °C), humidity, and mechanical shock per JEDEC JESD22 standards |
| 65 mA adjustable range | Supports multi-LED configurations (e.g., 5× red LEDs @ 13 mA or 3× high-brightness LEDs @ 22 mA) using single REXT value |
| High thermal robustness | 750 mW rating on standard 4-layer PCB enables direct mounting on metal-core or aluminum-backed boards for enhanced heat spreading |
Applications
| Automotive Interior Lighting | Industrial Status Indicators |
|---|---|
Use Scenario: Illuminating dashboard backlighting, HVAC controls, and door panel LEDs in passenger vehicles. IC Role / Device Role / Timing Role: Constant-current source regulating individual LED segments independent of forward voltage variation across temperature and aging. Use Value: Maintains consistent luminance across −40 °C to +85 °C ambient, eliminating visible dimming or color shift during cold starts or prolonged operation. |
Use Scenario: Driving status LEDs on PLC I/O modules, HMI panels, and factory automation controllers. IC Role / Device Role / Timing Role: Provides stable bias current for indicator LEDs subject to wide input voltage fluctuations (12–24 V DC) and EMI noise. Use Value: Delivers ±3 mA current accuracy despite 40 V max supply rating, preventing LED overdrive during brownout recovery or surge events. |
| Commercial LED Signage | Medical Device Indicators |
Use Scenario: Powering alphanumeric LED displays and segmented signs in retail kiosks and transit information systems. IC Role / Device Role / Timing Role: Single-chip current source replacing multiple discrete transistors and resistors per segment, simplifying layout and test. Use Value: Reduces component count by 60% and improves long-term current drift stability (<0.3 %/K), minimizing recalibration frequency. |
Use Scenario: Biasing front-panel status LEDs in diagnostic equipment and infusion pumps requiring safety-compliant illumination. IC Role / Device Role / Timing Role: Isolated, low-noise current source with no switching artifacts-critical for EMI-sensitive medical environments. Use Value: Meets IEC 60601-1 creepage/clearance requirements via SOT457 package geometry and eliminates high-frequency noise from PWM drivers. |
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 |
|---|---|---|---|
| ON Semiconductor NSI45020AZT1G | Fixed 20 mA, SOD-123FL package, 2.5 V min overhead, no REXT adjustability | Limited to low-VF LED strings (e.g., red/green); unsuitable for 3+ white LEDs or variable current needs | Select when board space is extreme and current is strictly fixed; avoid if thermal margin or adjustability is required. |
| Diodes Inc. AP1682WU-7 | 20 mA fixed, SOT-23-3, 1.8 V overhead, 350 mW max dissipation, no AEC-Q101 rating | Not qualified for automotive use; lower thermal capability restricts use to low-power indicators only | Choose for cost-sensitive consumer electronics where AEC-Q101 and >500 mW operation are unnecessary. |
Compared with NSI45020AZT1G and AP1682WU-7, the NCR402UH offers superior thermal handling (750 mW vs ≤350 mW), AEC-Q101 compliance, and field-adjustable current-making it the only option suitable for thermally demanding, safety-critical, or configurable LED loads in automotive and industrial systems.
Availability
NCR402UH is available at Aetrix Electronics and suitable for automotive interior lighting, industrial status indicators, and commercial LED signage requiring stable component supply, long-lifecycle support, and AEC-Q101-compliant sourcing.
Supply support for NCR402UH 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 semiconductor expert focused on high-volume, high-reliability essential semiconductors-including logic, discretes, MOSFETs, and analog devices-for automotive, industrial, and consumer markets.
The NCR402UH belongs to Nexperia's Automotive-Grade LED Driver family, engineered specifically for robust, space-constrained constant-current biasing in harsh-environment lighting systems where reliability and thermal resilience are non-negotiable.
FAQ
What is the minimum supply voltage required for regulation?
The NCR402UH requires a minimum supply voltage of VOUT + 1.4 V to maintain regulated output current. For example, with a 3.2 V LED string (VOUT = 3.2 V), the minimum VS is 4.6 V. Below this threshold, the device enters dropout and IOUT declines linearly with VS.
How does external resistor REXT affect output current?
REXT connects between Pin 6 and GND and forms a voltage divider with the internal 42 Ω resistor, adjusting the reference voltage that sets IOUT. A 24 Ω REXT yields ~35 mA; 75 Ω yields ~25 mA; open circuit defaults to 20 mA. Values below 15 Ω risk exceeding safe dissipation limits.
Can NCR402UH drive multiple parallel LEDs?
Yes-its three parallel IOUT pins (2, 3, 5) support distributed routing to multiple LED anodes, provided total current remains within 20–65 mA and thermal design accounts for shared junction heating. Individual LED cathodes must connect to separate current-sink paths or common ground with matched VF.
Is thermal derating required above 25 °C ambient?
Yes-power dissipation must be linearly derated above 25 °C using the 115 K/W Rth(j-a) value. At 85 °C ambient, maximum allowable Ptot drops to 420 mW. Layout with 1 cm² copper pour under Pins 2/3/5 significantly improves thermal margin and extends usable current range.
NCR402UH 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:
- 20mA
- Frequency:
- -
- Dimming:
- -
- Applications:
- -
- Operating Temperature:
- -55°C ~ 150°C (TA)
- Grade:
- Automotive
- Qualification:
- AEC-Q101
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- 6-TSOP
NCR402UH FAQ
1.How can I place an order for NCR402UH through Aetrix?
Please submit a Request for Quotation (RFQ) for NCR402UH 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 NCR402UH reliable?
The price and inventory of NCR402UH are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for NCR402UH is usually 5 days.
3.What payment methods are accepted for NCR402UH?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for NCR402UH transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for NCR402UH?
NCR402UH orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your NCR402UH 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 NCR402UH?
For technical support, including NCR402UH datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your NCR402UH requirements.
6.How does Aetrix verify that NCR402UH is sourced from the original manufacturer or authorized distributors?
All NCR402UH 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 NCR402UH meets industry standards.
7.What is the process for return or replacement of NCR402UH?
All NCR402UH units undergo pre-shipment inspection (PSI). If there is an issue with NCR402UH, 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 NCR402UH part is unused and in its original packaging.
Return procedure for NCR402UH:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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