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Texas Instruments LM3414HVMRX/NOPB
- Part No.:
- LM3414HVMRX/NOPB
- Manufacturer:
- Texas Instruments
- Category:
- LED Drivers
- Package:
- 8-PowerSOIC (0.154", 3.90mm Width)
- Datasheet:
-
LM3414HVMRX/NOPB.pdf
- Description:
- IC LED DRV RGLTR PWM 8SOPWRPAD
- Quantity:
- Payment:
- Shipping:
Inventory:2,397
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Product details
Overview
LM3414HVMRX/NOPB from Texas Instruments is a 1-A, 60-W common-anode-capable constant-current buck LED driver IC with integrated low-side N-channel MOSFET and no external current-sense resistor required. It operates from 4.5 V to 65 V input, delivers ±3% LED current accuracy at 1 A, achieves up to 96% efficiency, and supports PWM dimming with <10 µs pulse width for high-contrast lighting in architectural and automotive applications.
For engineers reviewing the LM3414HVMRX/NOPB datasheet, LM3414HVMRX/NOPB pinout, LM3414HVMRX/NOPB application, or LM3414HVMRX/NOPB equivalent, key selection considerations include its HV input range (4.5–65 V), PLM-based average current regulation, thermal fold-back via IADJ, adjustable switching frequency (250–1000 kHz), and WSON-8 package with exposed thermal pad.
Technical Context
The LM3414HVMRX/NOPB implements Pulse-Level-Modulation (PLM) control to regulate average LED current by sensing internal switch current during ON-time only-enabling true average current control without output-side sensing and reducing power loss versus conventional shunt resistors. It requires continuous conduction mode (CCM) operation and enforces a 400 ns minimum ON-time to maintain regulation accuracy.
Its integrated 5.4-V VCC regulator powers internal circuitry and supports external biasing (≤2 mA load); UVLO triggers at 3.75 V with 300 mV hysteresis. Thermal shutdown activates at 170°C with 10°C hysteresis, and peak switch current limiting trips at 3× ILED setpoint to protect against LED string short-circuit faults.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Input Voltage Range | 4.5 V to 65 V DC - supports wide-range industrial and automotive supplies without pre-regulation. |
| Max Output Current | 1 A ±3% - precise constant-current drive for high-power LED strings up to 60 W. |
| Switching Frequency | 250 kHz to 1000 kHz - adjustable via RFS; enables EMI optimization and compact magnetics. |
| Efficiency | Up to 96% - achieved via integrated MOSFET, no external sense resistor, and PLM architecture. |
| Dimming Support | PWM dimming with <10 µs minimum pulse width - enables 256-step resolution at 240 Hz for smooth brightness control. |
| Thermal Protection | 170°C shutdown with 10°C hysteresis - prevents damage under sustained overload or poor heatsinking. |
| Package | 3 mm × 3 mm WSON-8 with exposed thermal pad - optimized for high-power density and thermal dissipation. |
Pinout & Package
LM3414HVMRX/NOPB uses the Power Enhanced WSON-8 (NGQ) package: 3.00 mm × 3.00 mm body with exposed thermal pad (EP) that must be soldered to PCB ground plane for thermal and electrical integrity.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| VIN | Input voltage supply | Accepts 4.5–65 V DC; connects to input capacitor and high-side of inductor. |
| LX | Switch node | Drain of internal N-MOSFET; connects to inductor and Schottky diode anode. |
| DIM | PWM dimming control input | Logic-level interface (1.2 V threshold); enables/disables switching with fast slew-up for high-resolution dimming. |
| FS | Frequency setting input | Connects to ground via RFS to set switching frequency from 250–1000 kHz. |
| PGND | Power ground | Reference for power stage; must be tied externally to EP and GND. |
| IADJ | Current adjustment/thermal fold-back input | Biased at 1.255 V; sets LED current via RIADJ and enables analog dimming or temperature compensation. |
| GND | Analog ground | Reference for internal analog circuits; must connect externally to PGND. |
| VCC | Internal regulator output | 5.4 V regulated supply; bypassed with ≥1 µF ceramic capacitor to GND for stable gate drive and control logic. |
| EP | Exposed thermal pad | Electrically connected to PGND; mandatory for thermal performance and reliability at 1-A load. |
Key Features
| Feature | Design Value |
|---|---|
| No external current-sense resistor | Reduces BOM count, board space, and power loss-PLM senses internal switch current only during ON-time. |
| Common-anode LED string support | Enables direct drive of multi-LED arrays without reverse-polarity constraints, simplifying thermal layout. |
| Adjustable LED current (350–1000 mA) | Set precisely via single resistor (RIADJ) with ≤0.5% tolerance; supports analog dimming and thermal fold-back. |
| Integrated 5.4-V VCC regulator | Eliminates need for external bias supply; supports ≤2 mA external load while maintaining regulation down to VIN = 6 V. |
| Proprietary PLM control | Delivers true average current regulation with fast transient response and inherent CCM enforcement for stable dimming. |
Applications
| Architectural Lighting | Automotive Exterior Lighting |
|---|---|
|
Use Scenario: Linear LED strips and recessed troffer fixtures requiring uniform brightness and high lumen output across wide input voltage ranges (e.g., 12–48 V DC distribution). IC Role / Device Role / Timing Role: Constant-current buck controller regulating 1-A drive for 12–18 high-brightness LEDs in common-anode configuration. Use Value: Eliminates external sense resistor losses, enabling >95% efficiency at full load and simplified thermal management in enclosed luminaires. |
Use Scenario: Daytime running lights (DRL) and tail lamps operating from 9–16 V vehicle battery with cold-crank tolerance down to 4.5 V. IC Role / Device Role / Timing Role: High-voltage tolerant LED driver delivering stable 1-A current despite battery transients up to 65 V. Use Value: Built-in thermal shutdown and overcurrent protection prevent LED failure during fault conditions, meeting automotive reliability requirements. |
| MR-16 LED Retrofit Lamps | Office Troffer Systems |
|
Use Scenario: AC/DC-powered MR-16 replacements using bridge rectifier + bulk capacitor, where input can reach 65 V peak after rectification. IC Role / Device Role / Timing Role: Primary constant-current regulator accepting 4.5–65 V DC input and driving 3–6串联 high-power LEDs. Use Value: Single-chip solution replaces discrete buck controllers and sense resistors, reducing component count and improving lumen maintenance over lifetime. |
Use Scenario: Multi-lamp office troffer with centralized 24–48 V DC bus powering multiple LED modules with synchronized dimming. IC Role / Device Role / Timing Role: Individual lamp driver supporting PWM dimming inputs synchronized to building control systems at 240 Hz. Use Value: <10 µs minimum dimming pulse enables 256-step resolution without visible flicker, satisfying commercial lighting standards. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar constant-current buck LED driver applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| LM3414MRX/NOPB | Lower input range (4.5–42 V); identical pinout, PLM control, and feature set. | Suitable for 12/24 V systems only; not rated for 48 V+ or automotive load-dump transients. | Select when input stays ≤42 V and cost sensitivity favors non-HV variant. |
| TPS92630QPWPRQ1 | Automotive-grade AEC-Q100 qualified; 65 V max input; includes diagnostic flags and enhanced ESD (±8 kV HBM). | Supports functional safety monitoring (open/short LED detection); higher system-level validation overhead. | Choose for automotive front-lighting where diagnostics and qualification are mandatory. |
Compared with LM3414MRX/NOPB, LM3414HVMRX/NOPB adds 23 V headroom for transient robustness; versus TPS92630QPWPRQ1, it trades diagnostics and qualification for lower cost and simpler implementation in non-safety-critical lighting.
Availability
LM3414HVMRX/NOPB is available at Aetrix Electronics and suitable for architectural lighting, automotive exterior lamps, and MR-16 LED retrofit applications requiring stable component supply, high-efficiency constant-current drive, and wide-input-voltage resilience.
Supply support for LM3414HVMRX/NOPB 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
Texas Instruments is a global semiconductor leader specializing in analog, embedded processing, and power management technologies, with decades of expertise in high-reliability LED driver design.
The LM3414HV product line was engineered specifically for high-power, high-efficiency LED lighting systems demanding wide-input operation, minimal external components, and robust thermal and fault protection-targeting commercial, industrial, and automotive lighting markets.
FAQ
What is the maximum input voltage rating for LM3414HVMRX/NOPB?
The LM3414HVMRX/NOPB has an absolute maximum input voltage rating of 67 V for 500 ms transients and a recommended operating maximum of 65 V DC. This HV rating distinguishes it from the standard LM3414 (42 V max) and enables use in 48 V systems with load-dump immunity. Always observe derating guidelines per ambient temperature and PCB thermal design when operating near limits.
Does LM3414HVMRX/NOPB require an external current-sense resistor?
No, LM3414HVMRX/NOPB does not require an external current-sense resistor. Its proprietary Pulse-Level-Modulation (PLM) architecture senses current through the internal N-MOSFET during ON-time only, eliminating external sensing components while maintaining ±3% LED current accuracy across temperature and input voltage variations.
How is LED current adjusted on LM3414HVMRX/NOPB?
LED current on LM3414HVMRX/NOPB is set by connecting a precision resistor (RIADJ) between the IADJ pin and GND. With IADJ internally biased to 1.255 V, current follows ILED = 3125 / RIADJ (in mA, RIADJ in kΩ). For 1 A output, RIADJ = 3.125 kΩ (0.5% tolerance recommended). Shorting IADJ to GND limits output to safe default current.
What package type is used for LM3414HVMRX/NOPB?
LM3414HVMRX/NOPB uses the 3 mm × 3 mm WSON-8 (NGQ) package with exposed thermal pad (EP). This thermally enhanced package requires the EP to be soldered to a PCB copper pour connected to PGND for effective heat dissipation-critical for sustaining 1-A continuous output in compact lighting designs.
Can LM3414HVMRX/NOPB support analog dimming?
Yes, LM3414HVMRX/NOPB supports analog dimming via the IADJ pin: applying an external bias current (IEXT) reduces LED current linearly per ILED = 1.255 mA × (3125 / RIADJ) − IEXT. This enables seamless integration with ambient light or temperature sensors-e.g., using a transistor-based current source-to implement automatic thermal fold-back or daylight harvesting.
LM3414HVMRX/NOPB Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Texas Instruments
- Series:
- -
- Package/Case:
- 8-PowerSOIC (0.154", 3.90mm Width)
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Active
- Type:
- DC DC Regulator
- Topology:
- Step-Down (Buck)
- Internal Switch(s):
- Yes
- Number of Outputs:
- 1
- Voltage - Supply (Min):
- 4.5V
- Voltage - Supply (Max):
- 65V
- Voltage - Output:
- -
- Current - Output / Channel:
- 1A
- Frequency:
- 500kHz
- Dimming:
- Analog, PWM
- Applications:
- Lighting
- Operating Temperature:
- -40°C ~ 125°C (TJ)
- Grade:
- Automotive
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- 8-SO PowerPad
LM3414HVMRX/NOPB FAQ
1.How can I place an order for LM3414HVMRX/NOPB through Aetrix?
Please submit a Request for Quotation (RFQ) for LM3414HVMRX/NOPB 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 LM3414HVMRX/NOPB reliable?
The price and inventory of LM3414HVMRX/NOPB are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for LM3414HVMRX/NOPB is usually 5 days.
3.What payment methods are accepted for LM3414HVMRX/NOPB?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for LM3414HVMRX/NOPB transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for LM3414HVMRX/NOPB?
LM3414HVMRX/NOPB orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your LM3414HVMRX/NOPB 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 LM3414HVMRX/NOPB?
For technical support, including LM3414HVMRX/NOPB datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your LM3414HVMRX/NOPB requirements.
6.How does Aetrix verify that LM3414HVMRX/NOPB is sourced from the original manufacturer or authorized distributors?
All LM3414HVMRX/NOPB 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 LM3414HVMRX/NOPB meets industry standards.
7.What is the process for return or replacement of LM3414HVMRX/NOPB?
All LM3414HVMRX/NOPB units undergo pre-shipment inspection (PSI). If there is an issue with LM3414HVMRX/NOPB, 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 LM3414HVMRX/NOPB part is unused and in its original packaging.
Return procedure for LM3414HVMRX/NOPB:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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