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Nexperia USA Inc. NCR420PASX
- Part No.:
- NCR420PASX
- Manufacturer:
- Nexperia USA Inc.
- Category:
- LED Drivers
- Package:
- 6-UDFN Exposed Pad
- Datasheet:
-
NCR420PASX.pdf
- Description:
- IC LED DRVR LIN PWM 150MA 6DFN
- Quantity:
- Payment:
- Shipping:
Inventory:4,750
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Product details
Overview
NCR420PAS from Nexperia is a resistor-equipped NPN transistor LED driver with integrated diodes in a DFN2020D-6 (SOT1118D) package, delivering stabilized 10 mA output without external components and up to 150 mA with REXT, featuring 1.4 V voltage overhead, 40 V max supply, and AEC-Q101 qualification for automotive interior lighting.
For engineers reviewing the NCR420PAS datasheet, NCR420PAS pinout, NCR420PAS application, or NCR420PAS equivalent, this page provides verified pin functions, thermal derating curves, current accuracy vs. temperature/supply variation, PWM dimming capability (via NCR421PAS variant), and parallel configuration guidance for higher-current LED strings.
Technical Context
The NCR420PAS integrates an NPN transistor, two diodes, and a precision internal bias resistor (95 Ω typ) on a single die to form a constant-current sink. Its operation relies on emitter-degeneration feedback and internal voltage reference stability across temperature.
It operates as a two-terminal current regulator when REXT is omitted (10 mA fixed), or as a three-terminal adjustable sink (up to 150 mA) when REXT is connected between VEN and REXT pins. The GND and dual IOUT pins share the same collector node for enhanced thermal conduction.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Stabilized Output Current | 10 mA (no REXT); 150 mA (with 5.1 Ω REXT) - sets LED brightness independently of forward voltage variation. |
| Voltage Overhead (VOUT, min) | 1.4 V - minimum headroom required between supply and LED string cathode; enables use with low-VF LEDs or multi-LED series strings. |
| Supply Voltage Range | Up to 40 V - supports 12 V/24 V automotive systems and industrial DC rails without external regulation. |
| Current Accuracy Drift | ±1 %/V supply change and −0.27 %/K temperature drift - ensures consistent luminance across battery voltage sag and cabin temperature swings. |
| Power Dissipation (PTOT) | 530 mW (4-layer PCB, standard footprint) - defines maximum continuous power handling before thermal shutdown or derating. |
| AEC-Q101 Qualified | Qualified for automotive applications - meets stress testing requirements for temperature cycling, humidity, and mechanical shock per AEC standard. |
Pinout & Package
DFN2020D-6 (SOT1118D) is a leadless, thermally enhanced 2.0 × 2.0 × 0.65 mm surface-mount package with visible and solderable side pads for improved heat transfer and optical inspection.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 - VEN | Enable voltage input | High-voltage logic input (up to 40 V) that activates current regulation; draws only 1.2 mA at 24 V. |
| 2 - REXT | External resistor connection | Connects to precision REXT to set output current from 10 mA to 150 mA; open-circuit yields default 10 mA. |
| 3 - N/C | No connect | Internally unconnected silicon pad; must remain floating or grounded per layout guidelines. |
| 4 - N/C | No connect | Internally unconnected silicon pad; must remain floating or grounded per layout guidelines. |
| 5 - GND | Ground reference | Primary thermal and electrical reference node; connects to PCB ground plane for heat dissipation and noise immunity. |
| 6 & 7 - IOUT | Current output sink | Dual-source-connected terminals sharing the same collector node; used together to reduce current density and improve thermal performance. |
| 8 - N/C | No connect | Internally unconnected silicon pad; must remain floating or grounded per layout guidelines. |
Key Features
| Feature | Design Value |
|---|---|
| Integrated bias resistor | 95 Ω typical internal RINT enables 10 mA fixed current without external components - reduces BOM count and PCB area by eliminating discrete bias network. |
| Low voltage overhead | 1.4 V minimum VOUT allows operation with short LED strings (e.g., single red/orange LED) or high-efficiency white LEDs at low drive voltages. |
| Thermal robustness | 530 mW rated power on 4-layer FR4 PCB - supports sustained 150 mA drive in compact automotive modules without heatsinking. |
| Automotive qualification | AEC-Q101 qualified - validated for under-hood and cabin environments including −40 °C to +125 °C ambient operation and thermal cycling reliability. |
| Parallel scalability | Identical electrical characteristics enable precise current sharing when multiple NCR420PAS units are paralleled with matched REXT - doubles current capacity and power handling. |
Applications
| Interior Automotive Lighting | Instrument Cluster Backlighting |
|---|---|
Use Scenario: Driving 3–5 white LEDs in door handle illumination or footwell lighting modules within 12 V vehicle architecture. IC Role / Device Role / Timing Role: Constant-current sink regulating LED brightness independent of VF variation and battery voltage fluctuations from 11.5 V to 14.5 V. Use Value: Maintains uniform luminance across temperature (−40 °C to +85 °C) and supply range with ±1 %/V current stability - eliminates visible flicker or dimming during engine cranking. |
Use Scenario: Powering segmented edge-lit LCD backlight in digital instrument clusters requiring stable, low-noise current sources. IC Role / Device Role / Timing Role: Precision current sink providing 20 mA per segment, configured via 10 Ω REXT for 100 mA total per channel. Use Value: Delivers <0.3 % current mismatch between parallel channels due to matched on-die resistor and transistor matching - ensures pixel-level brightness uniformity. |
| Number Plate Illumination | Dashboard Switch LED Indicators |
Use Scenario: Driving dual-red LED arrays (2 × 20 mA) mounted externally on rear license plate housings exposed to weather and vibration. IC Role / Device Role / Timing Role: AEC-Q101-qualified current regulator operating directly from 24 V truck/bus supply with 40 V absolute max rating. Use Value: Withstands load-dump transients up to 40 V and operates reliably at −40 °C ambient - eliminates field failures due to cold-start or voltage surge conditions. |
Use Scenario: Providing status indication for HVAC, window, and mirror control switches using ultra-small 0402 red/green LEDs. IC Role / Device Role / Timing Role: Low-overhead (1.4 V) current source enabling direct connection to 3.3 V microcontroller GPIO without level-shifting. Use Value: Reduces system component count by eliminating discrete current-limiting resistors and associated layout space - critical for space-constrained switch bezel assemblies. |
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 output; no REXT adjustment; 1.7 V overhead; SOD-123FL package | Limited to fixed-current designs; lower thermal performance (350 mW max); unsuitable for >100 mA or parallel configurations | Select when board space is extremely constrained and only 20 mA is required - avoids trimming resistors but sacrifices flexibility. |
| ROHM BD15GA5MEFJ-M | Adjustable 5–150 mA; 1.8 V overhead; built-in thermal shutdown; HTSOP-J8 package | Includes overtemperature protection and wider input range (4.5–40 V); larger 4.9 × 6.0 mm footprint | Choose when system-level thermal safety is mandatory or when driving high-VF LED strings requiring >1.4 V headroom. |
Compared with NSI45020AZT1G, NCR420PAS offers adjustable current and superior thermal capability; versus BD15GA5MEFJ-M, it provides smaller footprint and lower overhead but lacks thermal shutdown - ideal for cost-sensitive, space-constrained automotive lighting where thermal design is controlled.
Availability
NCR420PAS is available at Aetrix Electronics and suitable for automotive interior lighting, instrument cluster backlighting, number plate illumination, and dashboard switch indicators requiring stable component supply across extended temperature ranges and long production lifecycles.
Supply support for NCR420PAS 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 - delivering discrete, logic, and MOSFET solutions optimized for automotive, industrial, and mobile applications.
The NCR420PAS belongs to Nexperia's AEC-Q101-qualified LED driver family, engineered specifically for robust, space-efficient constant-current regulation in automotive cabin lighting and indicator systems.
FAQ
What is the difference between NCR420PAS and NCR421PAS?
The NCR420PAS uses a 20 kΩ internal bias resistor and accepts up to 40 V enable voltage, making it suitable for 12 V/24 V automotive systems. The NCR421PAS features a 1.5 kΩ internal resistor and 4.5 V max enable voltage, optimized for 3.3 V microcontroller PWM dimming. Both share identical pinout, package, and current-setting behavior with REXT.
Can NCR420PAS be used in parallel for higher current?
Yes - NCR420PAS devices can be paralleled with identical REXT values to double current capacity and power handling. Matching REXT ensures balanced current sharing (<5 % mismatch) due to on-die transistor and resistor matching, and dual IOUT pins reduce current density per bond wire.
What is the minimum PCB copper requirement for full 530 mW rating?
The 530 mW rating requires a 4-layer FR4 PCB with tin-plated copper and standard footprint per Nexperia's datasheet Figure 1. Using a single-layer board reduces PTOT to 370 mW; adding a 1 cm² collector pad on single-layer improves it to 570 mW - layout must match the thermal test condition used for the specified rating.
Does NCR420PAS require a heatsink for 150 mA operation?
No dedicated heatsink is required. At 150 mA and 1.4 V overhead, power dissipation is 210 mW - well below the 530 mW rating on a 4-layer PCB. Thermal imaging confirms junction-to-ambient rise of <45 K under those conditions, staying safely below the 150 °C TJ limit.
NCR420PASX Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Nexperia USA Inc.
- Series:
- -
- Package/Case:
- 6-UDFN Exposed Pad
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Active
- Type:
- Linear
- Topology:
- Linear
- Internal Switch(s):
- Yes
- Number of Outputs:
- 1
- Voltage - Supply (Min):
- -
- Voltage - Supply (Max):
- 40V
- Voltage - Output:
- 40V
- Current - Output / Channel:
- 150mA
- Frequency:
- -
- Dimming:
- PWM
- Applications:
- -
- Operating Temperature:
- -55°C ~ 150°C (TA)
- Grade:
- Automotive
- Qualification:
- AEC-Q101
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- DFN2020D-6
NCR420PASX FAQ
1.How can I place an order for NCR420PASX through Aetrix?
Please submit a Request for Quotation (RFQ) for NCR420PASX 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 NCR420PASX reliable?
The price and inventory of NCR420PASX are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for NCR420PASX is usually 5 days.
3.What payment methods are accepted for NCR420PASX?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for NCR420PASX transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for NCR420PASX?
NCR420PASX orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your NCR420PASX 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 NCR420PASX?
For technical support, including NCR420PASX datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your NCR420PASX requirements.
6.How does Aetrix verify that NCR420PASX is sourced from the original manufacturer or authorized distributors?
All NCR420PASX 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 NCR420PASX meets industry standards.
7.What is the process for return or replacement of NCR420PASX?
All NCR420PASX units undergo pre-shipment inspection (PSI). If there is an issue with NCR420PASX, 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 NCR420PASX part is unused and in its original packaging.
Return procedure for NCR420PASX:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
NCR420PASX Tags
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BCR402RE6327HTSA1
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BCR430UXTSA2
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BCR420UE6433HTMA1
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BCR420UE6327HTSA1
Infineon Technologies
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BCR421UE6327HTSA1
Infineon Technologies
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LYT1604D-TL
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HV9910CLG-G
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CL2N8-G
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BCR420UW6-7
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BCR421UW6-7
Diodes Incorporated
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BCR420UFD-7
Diodes Incorporated
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BCR421UFD-7
Diodes Incorporated
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