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Texas Instruments LM3414HVSDX/NOPB
- Part No.:
- LM3414HVSDX/NOPB
- Manufacturer:
- Texas Instruments
- Category:
- LED Drivers
- Package:
- 8-WFDFN Exposed Pad
- Datasheet:
-
LM3414HVSDX/NOPB.pdf
- Description:
- IC LED DRIVER RGLTR PWM 1A 8WSON
- Quantity:
- Payment:
- Shipping:
Inventory:4,355
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Product details
Overview
LM3414HVSDX/NOPB from Texas Instruments is a 1-A, 65-V input, constant-current buck LED driver with integrated low-side N-channel MOSFET and Pulse-Level-Modulation (PLM) control. It delivers ±3% LED current accuracy, supports up to 60 W LED loads (e.g., 18×3-W HBLEDs), operates at 250–1000 kHz switching frequency, and requires no external current-sense resistor - used in high-power architectural lighting and automotive LED headlamps.
For engineers reviewing the LM3414HVSDX/NOPB datasheet, LM3414HVSDX/NOPB pinout, LM3414HVSDX/NOPB application, or LM3414HVSDX/NOPB equivalent, key selection criteria include input voltage range (4.5–65 V), adjustable output current (350–1000 mA), thermal shutdown (170°C), PLM-based average current regulation, and WSON-8 package compatibility with high-power thermal management.
Technical Context
The LM3414HVSDX/NOPB implements proprietary Pulse-Level-Modulation (PLM) to regulate average LED current by sensing internal switch current during ON-time only - eliminating external sense resistors and reducing power loss versus conventional methods. Its control loop operates without external compensation and maintains continuous conduction mode (CCM) for stable regulation.
It integrates a 5.4-V internal VCC regulator (bypassed with 1 µF ceramic), supports dual dimming modes (PWM via DIM pin with <10 µs minimum pulse width; analog via IADJ bias current), and features built-in overcurrent protection (trips at 3× set current) and thermal shutdown (170°C with 10°C hysteresis).
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Input Voltage Range | 4.5 V to 65 V DC - enables direct operation from 48-V industrial rails or automotive battery systems with transient tolerance up to 67 V (500 ms). |
| Output Current Accuracy | ±3% over –40°C to +125°C - ensures consistent luminance across temperature without calibration. |
| Switching Frequency | 250 kHz to 1000 kHz (adjustable via RFS) - allows EMI optimization and compact magnetics selection. |
| LED Current Range | 350 mA to 1000 mA (set by RIADJ resistor) - supports flexible design from mid-power to high-power LED arrays. |
| Efficiency | Up to 96% - achieved via integrated MOSFET (1.8 Ω RDS(on)) and PLM architecture minimizing sensing losses. |
| Thermal Shutdown | 170°C junction temperature with 10°C hysteresis - protects against sustained overload or poor heatsinking. |
| Package Thermal Resistance | RθJA = 47.7°C/W (WSON-8) - enables 1-A continuous operation with minimal PCB copper area. |
Pinout & Package
LM3414HVSDX/NOPB is housed in a thermally enhanced 3 mm × 3 mm WSON-8 package with exposed thermal pad (EP) that must be soldered to PGND for optimal heat dissipation and electrical stability.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| VIN | Input voltage supply | Accepts 4.5–65 V DC; connects to input capacitor (CIN) and internal high-voltage circuitry. |
| LX | Switch node | Drain of integrated N-MOSFET; connects to inductor and Schottky diode anode in buck topology. |
| DIM | PWM dimming control input | Logic-level interface (1.2 V threshold); enables/disables switching with fast slew-up for 256-step dimming resolution. |
| FS | Frequency setting input | Connects to ground via RFS resistor (20–80 kΩ) to program switching frequency from 250–1000 kHz. |
| PGND | Power ground | Reference for high-current paths; must be externally tied to EP and GND pins for low-impedance return. |
| IADJ | Analog current adjustment input | Biased at 1.255 V; sets LED current via RIADJ resistor (3.13–8.93 kΩ for 1 A–350 mA) and supports analog dimming/thermal foldback. |
| GND | Analog ground | Reference for internal analog circuits; must be connected externally to PGND to avoid noise coupling. |
| VCC | Internal regulator output | 5.4-V regulated supply for gate drive and control logic; requires 1 µF ceramic bypass to GND. |
| EP | Exposed thermal pad | Electrically connected to PGND; mandatory for thermal performance and EMI reduction. |
Key Features
| Feature | Design Value |
|---|---|
| No external current-sense resistor | Reduces BOM count and board space; eliminates I²R power loss in sensing path using integrated PLM current sensing. |
| Adjustable constant LED current (350–1000 mA) | Set precisely via single RIADJ resistor (0.5% tolerance recommended); enables one platform to support multiple LED configurations. |
| PWM dimming with <10 µs minimum pulse width | Supports >256-step brightness control at 240 Hz without visible flicker; DIM pin has internal pullup and fast response. |
| Integrated low-side N-MOSFET (1.8 Ω RDS(on)) | Enables 60-W LED power delivery in compact WSON-8; eliminates external FET and bootstrapping components. |
| Thermal foldback via IADJ pin | Allows automatic LED current reduction using external temperature sensor bias - prevents thermal runaway without MCU intervention. |
Applications
| Architectural Lighting | Automotive Headlamps |
|---|---|
|
Use Scenario: Linear LED troffers and recessed downlights in commercial office spaces requiring uniform illumination and DALI-compatible dimming. IC Role / Device Role: Constant-current buck controller regulating 1-A string of 12×3-W common-anode HBLEDs from 48-V DC bus. Use Value: 96% efficiency and ±3% current accuracy maintain lumen consistency across fixtures; WSON-8 package enables high-density thermal layout on metal-core PCBs. |
Use Scenario: Adaptive front-lighting systems (AFS) with matrix LED arrays requiring independent zone dimming and rapid PWM response. IC Role / Device Role: High-voltage buck driver powering individual LED segments (e.g., 6–9 LEDs per channel) from 12-V automotive battery with load dump protection. Use Value: 65-V absolute max input rating withstands ISO 7637-2 pulse 5a transients; 400 ns minimum ON-time supports precise current control at high VIN/VLED ratios. |
| MR-16 LED Replacement Lamps | Industrial Machine Vision Lighting |
|
Use Scenario: Retrofit MR-16 lamps operating directly from AC/DC 12–24 V drivers in retail display lighting. IC Role / Device Role: Single-chip solution driving 350–700 mA LED strings with analog dimming via ambient light sensor feedback on IADJ pin. Use Value: Analog dimming capability eliminates need for microcontroller; thermal foldback extends lamp life under enclosed thermal conditions. |
Use Scenario: High-intensity strobed LED arrays for barcode readers and inspection systems requiring microsecond-level current turn-on precision. IC Role / Device Role: Fast-response LED driver synchronized to camera trigger signal via DIM pin, delivering 1-A pulses with <10 µs rise time. Use Value: Proprietary PLM control ensures true average current regulation even during short-pulse operation - critical for repeatable image exposure. |
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 |
|---|---|---|---|
| LM3414SDX/NOPB | Lower input voltage range (4.5–42 V); identical pinout, PLM architecture, and WSON-8 package. | Suitable for 24-V systems only; not rated for 48-V or automotive load-dump conditions. | Select when input voltage never exceeds 42 V and cost sensitivity favors standard-voltage variant. |
| TPS92691QPWPRQ1 | Automotive-grade AEC-Q100 qualified; includes current monitor output and enhanced fault reporting (open/short LED detection). | Requires external current sense resistor; supports higher VIN (65 V) but adds complexity and BOM cost. | Choose for safety-critical automotive lighting where diagnostics and qualification outweigh simplicity. |
Compared with LM3414SDX/NOPB, the LM3414HVSDX/NOPB extends input range to 65 V for robustness in industrial and heavy-duty automotive systems; versus TPS92691QPWPRQ1, it trades diagnostic features for lower component count and higher efficiency in non-safety-critical high-power LED applications.
Availability
LM3414HVSDX/NOPB is available at Aetrix Electronics and suitable for architectural lighting, automotive headlamps, and industrial machine vision lighting requiring stable component supply, long-term production continuity, and RoHS-compliant WSON packaging.
Supply support for LM3414HVSDX/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 ICs, with decades of expertise in LED driver innovation and automotive-grade reliability.
The LM3414HVSDX/NOPB belongs to TI's high-voltage constant-current LED driver product line, designed specifically for efficient, compact, and thermally robust driving of high-power HBLED arrays in industrial and transportation lighting.
FAQ
What is the maximum input voltage rating for LM3414HVSDX/NOPB?
The LM3414HVSDX/NOPB has an absolute maximum input voltage rating of 65 V DC, with transient tolerance up to 67 V for 500 ms. This rating is validated per TI's SNVS678F datasheet and enables reliable operation in 48-V industrial systems and automotive battery environments with load dump events. The LM3414HVSDX/NOPB must not be operated above this limit to prevent permanent damage.
Does LM3414HVSDX/NOPB require an external current-sense resistor?
No, the LM3414HVSDX/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 architecture eliminates I²R losses and reduces BOM count - a core feature confirmed in TI's datasheet Section 1 and Figure 14 waveform analysis.
How is LED current adjusted on LM3414HVSDX/NOPB?
LED current on the LM3414HVSDX/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/kΩ). For example, 3.13 kΩ yields 1000 mA. TI specifies 0.5% resistor tolerance for ±3% accuracy - a requirement explicitly stated in Section 8.1.2 of the LM3414HVSDX/NOPB datasheet.
What package type is used for LM3414HVSDX/NOPB?
The LM3414HVSDX/NOPB uses a 3 mm × 3 mm WSON-8 package (NGQ) with exposed thermal pad (EP). This thermally enhanced package achieves RθJA = 47.7°C/W and requires EP to be soldered to a PGND plane for effective heat dissipation. Package dimensions and thermal metrics are documented in Section 12 and Table 6.4 of the official TI datasheet for LM3414HVSDX/NOPB.
Can LM3414HVSDX/NOPB support both PWM and analog dimming?
Yes, the LM3414HVSDX/NOPB supports both dimming methods: PWM dimming via the DIM pin (logic-level input, 1.2 V threshold, <10 µs minimum pulse width) and analog dimming via bias current injection into the IADJ pin. Section 7.3.4 and 7.3.5 of the TI datasheet confirm simultaneous support, with analog dimming enabling thermal foldback and ambient light control without additional ICs.
LM3414HVSDX/NOPB Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Texas Instruments
- Series:
- -
- Package/Case:
- 8-WFDFN Exposed Pad
- 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-WSON (3x3)
LM3414HVSDX/NOPB FAQ
1.How can I place an order for LM3414HVSDX/NOPB through Aetrix?
Please submit a Request for Quotation (RFQ) for LM3414HVSDX/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 LM3414HVSDX/NOPB reliable?
The price and inventory of LM3414HVSDX/NOPB are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for LM3414HVSDX/NOPB is usually 5 days.
3.What payment methods are accepted for LM3414HVSDX/NOPB?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for LM3414HVSDX/NOPB transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for LM3414HVSDX/NOPB?
LM3414HVSDX/NOPB orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your LM3414HVSDX/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 LM3414HVSDX/NOPB?
For technical support, including LM3414HVSDX/NOPB datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your LM3414HVSDX/NOPB requirements.
6.How does Aetrix verify that LM3414HVSDX/NOPB is sourced from the original manufacturer or authorized distributors?
All LM3414HVSDX/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 LM3414HVSDX/NOPB meets industry standards.
7.What is the process for return or replacement of LM3414HVSDX/NOPB?
All LM3414HVSDX/NOPB units undergo pre-shipment inspection (PSI). If there is an issue with LM3414HVSDX/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 LM3414HVSDX/NOPB part is unused and in its original packaging.
Return procedure for LM3414HVSDX/NOPB:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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