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Texas Instruments LM3414HVMR/NOPB
- Part No.:
- LM3414HVMR/NOPB
- Manufacturer:
- Texas Instruments
- Category:
- LED Drivers
- Package:
- 8-PowerSOIC (0.154", 3.90mm Width)
- Datasheet:
-
LM3414HVMR/NOPB.pdf
- Description:
- IC LED DRV RGLTR PWM 8SOPWRPAD
- Quantity:
- Payment:
- Shipping:
Inventory:2,602
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Product details
Overview
LM3414HVMR/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-sensing 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 minimum pulse width for high-contrast lighting control in architectural and automotive LED systems.
For engineers reviewing the LM3414HVMR/NOPB datasheet, LM3414HVMR/NOPB pinout, LM3414HVMR/NOPB application, or LM3414HVMR/NOPB equivalent, key selection considerations include its wide 4.5–65 V input range, PLM-based average current regulation without sense resistors, thermal fold-back via IADJ, adjustable 250–1000 kHz switching frequency, and WSON-8 package with exposed thermal pad for high-power LED thermal management.
Technical Context
The LM3414HVMR/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 shunt resistors and reducing sensing losses versus conventional methods. Its integrated 1.8-Ω N-MOSFET and internal 5.4-V VCC regulator eliminate bootstrapping components and simplify layout.
It requires continuous conduction mode (CCM) operation, enforced by a 400 ns minimum ON-time constraint and inductor sizing per Equation 7–8. The DIM pin accepts logic-level PWM signals for fast slew-up dimming, while the IADJ pin enables analog dimming and thermal fold-back via external bias current.
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-brightness LED strings up to 60 W. |
| Switching Frequency | 250 kHz to 1000 kHz - adjustable via RFS resistor; higher frequencies enable smaller magnetics and easier EMI filtering. |
| LED Current Accuracy | ±3% over –40°C to +125°C - ensures consistent luminance across temperature and line variations. |
| Efficiency | Up to 96% - achieved via integrated MOSFET, PLM control, and elimination of external sense resistor losses. |
| 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 - safeguards against overheating in enclosed or high-ambient environments. |
Pinout & Package
LM3414HVMR/NOPB uses the Power Enhanced 3 mm × 3 mm WSON-8 package with exposed thermal pad (EP), optimized for high-power dissipation in space-constrained LED driver designs. The EP must be soldered to a PCB thermal plane connected to PGND.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| VIN | Input voltage supply | Accepts 4.5–65 V DC; connects to input capacitor CIN and high-side of inductor L1. |
| LX | Switch node | Drain of internal N-MOSFET; connects to inductor L1 and cathode of freewheeling diode D1. |
| DIM | PWM dimming control input | Logic-level input (1.2 V threshold); enables/disables switching with fast current slew-up for high-resolution dimming. |
| FS | Frequency setting input | Connects to ground via RFS resistor to set switching frequency from 250–1000 kHz. |
| PGND | Power ground | Reference for power circuitry; must be externally tied to EP and GND to minimize noise and thermal resistance. |
| IADJ | Current adjustment / analog dimming input | Biased at 1.255 V; connects to ground via RIADJ for LED current setting (350–1000 mA), or accepts external bias for analog dimming/thermal fold-back. |
| GND | Analog ground | Reference for internal analog circuitry; must be connected externally to PGND for stable regulation. |
| VCC | Internal regulator output | 5.4-V regulated supply for internal circuits; requires ≥1 µF ceramic bypass capacitor to GND. |
| EP | Thermal pad (power ground) | Electrically connected to PGND; primary heat path to PCB; essential for thermal performance at 1-A load. |
Key Features
| Feature | Design Value |
|---|---|
| No external current-sense resistor | Reduces BOM count, board area, and power loss-PLM senses internal switch current only during ON-time. |
| Adjustable LED current (350–1000 mA) | Set precisely via single RIADJ resistor (0.5% tolerance recommended); enables flexible design reuse across LED configurations. |
| Integrated low-side N-MOSFET (1.8 Ω RDS(on)) | Eliminates external switch and gate-drive complexity; simplifies layout and improves reliability in high-current paths. |
| Thermal fold-back via IADJ pin | Enables automatic LED current reduction under elevated temperature using external thermistor or sensor bias network. |
| Constant-frequency PWM with PLM control | Ensures predictable EMI profile and stable loop behavior without external compensation components. |
Applications
| Architectural Lighting | Automotive Exterior Lighting |
|---|---|
|
Use Scenario: Linear LED strips and recessed troffer fixtures requiring uniform, flicker-free illumination with high lumen output and thermal robustness. IC Role / Device Role / Timing Role: Constant-current buck controller regulating 1-A LED string current with ±3% accuracy across 4.5–65 V input transients. Use Value: Enables compact, high-efficiency drivers without sense resistors-reducing heat generation and improving system lifetime in thermally constrained enclosures. |
Use Scenario: Headlamp and fog lamp modules needing reliable, high-contrast dimming and wide-input operation across vehicle battery variations (9–16 V nominal, up to 65 V load dump). IC Role / Device Role / Timing Role: High-voltage buck LED driver with 170°C thermal shutdown and fast PWM dimming response for adaptive driving beam control. Use Value: Supports direct connection to automotive battery without pre-regulator; PLM ensures stable current despite input ripple and temperature drift. |
| MR-16 LED Replacement Lamps | Office Troffer Retrofit Kits |
|
Use Scenario: AC/DC-powered MR-16 LED retrofit bulbs where space, thermal density, and EMI compliance are critical. IC Role / Device Role / Timing Role: Primary LED current regulator in isolated flyback + buck hybrid topology, delivering 1 A at >90% efficiency in 20-mm diameter form factor. Use Value: WSON-8 package with EP enables direct thermal coupling to metal housing; no external sense resistor avoids placement conflicts in tight layouts. |
Use Scenario: Commercial troffer upgrades replacing fluorescent tubes with multi-string LED arrays requiring uniform brightness and long service life. IC Role / Device Role / Timing Role: Single-string 1-A driver supporting analog dimming via 0–10 V interface and PWM via DALI-compatible controllers. Use Value: IADJ pin allows seamless integration with ambient light sensors for daylight harvesting-reducing energy use without compromising visual comfort. |
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 |
|---|---|---|---|
| LM3409HVMM/NOPB | Higher max input voltage (75 V), external MOSFET, requires external current sense resistor and compensation network. | Supports >1.5 A output and higher-power arrays; better suited for custom high-current or multi-string topologies. | Select when >1 A output or discrete FET control is needed; avoid if BOM simplicity and footprint minimization are priorities. |
| TPS92630QPWPRQ1 | Automotive-grade AEC-Q100 qualified, integrated high-side switch, 3.3 V logic interface, built-in diagnostics. | Designed for safety-critical automotive lighting with fault reporting; lacks analog dimming via IADJ but adds SPI configurability. | Choose for ASIL-B compliant headlamp modules; not suitable for cost-sensitive commercial lighting where LM3414HVMR/NOPB's PLM advantage applies. |
Compared with LM3414HVMR/NOPB, LM3409HVMM/NOPB trades integration for scalability, while TPS92630QPWPRQ1 adds automotive qualification and digital control at the expense of analog flexibility and component count-making LM3414HVMR/NOPB optimal for high-efficiency, low-BOM commercial and industrial LED drivers.
Availability
LM3414HVMR/NOPB is available at Aetrix Electronics and suitable for architectural lighting, automotive exterior lamps, and MR-16 LED replacement modules requiring stable component supply, long-lifecycle support, and high-reliability thermal performance.
Supply support for LM3414HVMR/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 innovation.
The LM3414HVMR/NOPB belongs to TI's high-voltage constant-current LED driver product line, engineered specifically for efficient, compact, and thermally robust single-string LED lighting in commercial, industrial, and automotive environments.
FAQ
What is the maximum input voltage supported by the LM3414HVMR/NOPB?
The LM3414HVMR/NOPB supports a maximum continuous input voltage of 65 V DC, with transient capability up to 67 V for 500 ms. This HV rating distinguishes it from the standard LM3414 (42 V max) and makes it suitable for automotive load-dump conditions and wide-input industrial supplies. Always ensure VIN remains within absolute maximum ratings to prevent permanent damage to the LM3414HVMR/NOPB.
Does the LM3414HVMR/NOPB require an external current-sense resistor?
No, the LM3414HVMR/NOPB does not require an external current-sense resistor. It uses proprietary Pulse-Level-Modulation (PLM) to regulate average LED current by sensing the internal N-MOSFET's switch current during ON-time only. This eliminates sense-resistor power loss and reduces component count-key advantages confirmed in the LM3414HVMR/NOPB datasheet Section 7.3.1 and Feature list.
How is LED current adjusted on the LM3414HVMR/NOPB?
LED current is adjusted by connecting a precision resistor (RIADJ) between the IADJ pin and GND. The LM3414HVMR/NOPB's internal 1.255-V reference sets current per ILED = 3125 / RIADJ (mA), enabling 350–1000 mA range. For example, 3.13 kΩ yields 1 A. The LM3414HVMR/NOPB datasheet Table 2 and Section 8.1.2 specify 0.5% resistor tolerance for ±3% current accuracy.
What package type does the LM3414HVMR/NOPB use, and why is the EP pad important?
The LM3414HVMR/NOPB uses the 3 mm × 3 mm WSON-8 package with exposed thermal pad (EP). The EP must be soldered to a PCB copper pour tied to PGND to provide the primary thermal path-critical for dissipating heat at 1-A output. Thermal metrics show RθJB = 22.3°C/W for this package, confirming its suitability for high-power LED drivers where the LM3414HVMR/NOPB operates near thermal limits.
Can the LM3414HVMR/NOPB support both PWM and analog dimming?
Yes, the LM3414HVMR/NOPB supports both dimming methods: PWM dimming via the DIM pin (logic-level input, <10 µs min pulse) and analog dimming via the IADJ pin using external bias current. Analog dimming enables seamless integration with ambient light or temperature sensors-as demonstrated in Figure 18 of the LM3414HVMR/NOPB datasheet-while maintaining full current regulation fidelity.
LM3414HVMR/NOPB Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Texas Instruments
- Series:
- -
- Package/Case:
- 8-PowerSOIC (0.154", 3.90mm Width)
- Packaging:
- Tube
- 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
LM3414HVMR/NOPB FAQ
1.How can I place an order for LM3414HVMR/NOPB through Aetrix?
Please submit a Request for Quotation (RFQ) for LM3414HVMR/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 LM3414HVMR/NOPB reliable?
The price and inventory of LM3414HVMR/NOPB are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for LM3414HVMR/NOPB is usually 5 days.
3.What payment methods are accepted for LM3414HVMR/NOPB?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for LM3414HVMR/NOPB transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for LM3414HVMR/NOPB?
LM3414HVMR/NOPB orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your LM3414HVMR/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 LM3414HVMR/NOPB?
For technical support, including LM3414HVMR/NOPB datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your LM3414HVMR/NOPB requirements.
6.How does Aetrix verify that LM3414HVMR/NOPB is sourced from the original manufacturer or authorized distributors?
All LM3414HVMR/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 LM3414HVMR/NOPB meets industry standards.
7.What is the process for return or replacement of LM3414HVMR/NOPB?
All LM3414HVMR/NOPB units undergo pre-shipment inspection (PSI). If there is an issue with LM3414HVMR/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 LM3414HVMR/NOPB part is unused and in its original packaging.
Return procedure for LM3414HVMR/NOPB:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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