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Texas Instruments LM3409HVMY/NOPB
- Part No.:
- LM3409HVMY/NOPB
- Manufacturer:
- Texas Instruments
- Category:
- LED Drivers
- Package:
- 10-PowerTFSOP, 10-MSOP (0.118", 3.00mm Width)
- Datasheet:
-
LM3409HVMY/NOPB.pdf
- Description:
- IC LED DRIVER CTRLR PWM 10HVSSOP
- Quantity:
- Payment:
- Shipping:
Inventory:2,239
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Product details
Overview
LM3409HVMY/NOPB from Texas Instruments is a P-channel MOSFET buck controller for high-power LED current regulation, supporting 6 V to 75 V input range, differential high-side current sensing with 198 mV typical threshold, and constant off-time (COFT) control enabling up to 5 A output current without loop compensation. It targets automotive lighting and industrial LED drivers requiring robust dimming and thermal resilience.
For engineers reviewing the LM3409HVMY/NOPB datasheet, LM3409HVMY/NOPB pinout, LM3409HVMY/NOPB application, or LM3409HVMY/NOPB equivalent, key selection factors include its 75 V max VIN rating, 10-pin HVSSOP thermally enhanced package, 10,000:1 PWM dimming capability, and compatibility with ceramic-only output capacitors in buck LED driver topologies.
Technical Context
The LM3409HVMY/NOPB implements a Controlled Off-Time (COFT) architecture combining peak current detection with an output-voltage-dependent one-shot off-timer, enabling inherent cycle-by-cycle current limiting and stable operation in both CCM and DCM without external compensation. Its differential high-side current sense amplifier features polarity-swapping per cycle to cancel input offset error, ensuring accurate average LED current regulation.
It integrates a 2 Ω, 1-A peak gate driver for external P-FETs, a 6 V VCC linear regulator referenced to VIN, programmable UVLO via resistor divider on UVLO pin (1.243 V threshold), and fast enable/disable logic with 1.74 V EN threshold and 42 ns rising delay. Thermal shutdown and low-power shutdown (110 µA ISD) are built-in.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Input Voltage Range | 6 V to 75 V - supports wide-range automotive and industrial DC supplies including 48 V systems and battery transients. |
| Current Sense Threshold | 198 mV typical - sets LED current via external sense resistor; adjustable from 0–248 mV using IADJ pin voltage or resistor. |
| Gate Drive Strength | 2 Ω sourcing/sinking - drives P-channel MOSFET gates directly with 1-A peak current, minimizing external drive complexity. |
| PWM Dimming Range | 10,000:1 - enables high-contrast brightness control in display backlighting and adaptive lighting without flicker. |
| Package | 10-pin HVSSOP (3.0 mm × 3.0 mm) with exposed thermal pad - provides 54.4°C/W junction-to-ambient thermal resistance for high-power LED driver PCBs. |
| Operating Junction Temp | −40°C to +125°C - qualified for under-hood automotive environments and industrial ambient conditions. |
| Shutdown Current | 110 µA - enables ultra-low quiescent power in standby mode for energy-sensitive applications. |
Pinout & Package
LM3409HVMY/NOPB uses the thermally enhanced 10-pin HVSSOP (DGQ) package with exposed thermal pad connected to GND. The pinout is validated per TI SNVS602L Rev L datasheet Figure 3 (Top View).
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 UVLO | Undervoltage lockout input | Resistor divider from VIN sets turn-on at 1.243 V; 22 µA hysteresis current ensures clean startup under brownout. |
| 2 IADJ | Analog current adjust input | Sets current sense threshold (0–248 mV) via voltage (0–1.24 V), resistor-to-GND, or open-circuit (1.24 V default). |
| 3 EN | Enable / PWM dimming input | Logic-level interface: >1.74 V enables, <0.5 V shuts down, PWM signal enables high-frequency dimming without external FET. |
| 4 COFF | Off-time programming node | RC network (ROFF + COFF) sets tOFF; exponential charging yields ~300 µs max off-time when VO < 1.24 V. |
| 5 GND | Power and signal ground | Main return path; thermal pad must be soldered to PCB GND plane via ≥4 vias for thermal performance. |
| 6 PGATE | P-channel MOSFET gate driver output | Drives external high-side PFET; 2 Ω drive strength supports fast switching and low gate loss. |
| 7 CSN | Negative current sense input | Connects to low side of sense resistor; differential pair with CSP rejects common-mode noise in high-side sensing. |
| 8 CSP | Positive current sense input | Connects to high side of sense resistor and VIN; enables true high-side sensing without shunt ground disruption. |
| 9 VCC | VIN-referenced linear regulator output | Supplies internal circuitry and PFET gate drive; requires ≥1 µF ceramic capacitor to VIN for stability. |
| 10 VIN | Main power input | Accepts 6–75 V; powers VCC regulator and supplies energy to buck stage via external components. |
Key Features
| Feature | Design Value |
|---|---|
| No control loop compensation required | COFT architecture eliminates need for external compensation network, reducing BOM count and layout sensitivity. |
| Differential high-side current sensing | Rejects common-mode noise and avoids ground-path disruption, enabling accurate current regulation in high-noise automotive environments. |
| 10,000:1 PWM dimming range | Supports precise brightness control down to 0.01% duty cycle without visible flicker in display and architectural lighting. |
| Thermally enhanced HVSSOP package | Exposed thermal pad and 3.0 mm × 3.0 mm footprint enable efficient heat transfer in space-constrained LED driver modules. |
| Cycle-by-cycle current limit | Hardware-based overcurrent protection triggers every switching cycle, preventing MOSFET failure during short-circuit or overload events. |
Applications
| Automotive Headlamp Driver | Industrial High-Bay Lighting |
|---|---|
Use Scenario: Driving high-brightness LED arrays in vehicle headlamps with input from 12 V/24 V battery plus load-dump transients up to 60 V. IC Role / Device Role / Timing Role: Constant-current buck controller regulating up to 5 A through external P-FET, using COFT to maintain stable current despite wide VIN variation and temperature drift. Use Value: Enables single-chip solution for AEC-Q100-compliant designs (LM3409HV-Q1 variant), eliminating compensation design effort and improving transient response during rapid beam pattern changes. |
Use Scenario: Powering multi-string 48 V LED fixtures in warehouse lighting, operating continuously at elevated ambient temperatures. IC Role / Device Role / Timing Role: High-efficiency current regulator controlling parallel LED strings via external sense resistors and high-side sensing topology. Use Value: Delivers >90% efficiency across 20–75 V input range and maintains ±3% current accuracy over −40°C to +125°C, reducing thermal derating requirements. |
| Architectural Accent Lighting | UV-C Disinfection Module |
Use Scenario: Dimmable linear LED strips in commercial interiors requiring smooth 0–100% analog and PWM dimming with zero-flicker performance. IC Role / Device Role / Timing Role: Dual-dimming interface controller accepting IADJ voltage for analog dimming and EN pin PWM for digital control, with seamless transition between modes. Use Value: Achieves 250:1 analog and 10,000:1 PWM dimming ranges simultaneously, meeting DALI-2 and Zhaga-compliant system requirements without auxiliary ICs. |
Use Scenario: Driving high-current UVC LEDs (275 nm) in portable disinfection devices where thermal management and compact size are critical. IC Role / Device Role / Timing Role: Constant-current source delivering precise 1–3 A pulses to UVC diodes, leveraging fast enable/disable and thermal shutdown for safety-critical operation. Use Value: Built-in thermal shutdown and 110 µA shutdown current extend battery life and prevent LED degradation during overheating events. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar LED buck controller applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| LM3409MY/NOPB | Max VIN = 42 V (vs. 75 V); identical pinout, COFT architecture, and feature set. | Suitable only for ≤42 V systems (e.g., 24 V industrial, 12 V automotive); not rated for 48 V+ or load-dump transients. | Select LM3409MY/NOPB when input voltage remains strictly below 42 V and cost optimization is prioritized. |
| LM3409HV-Q1 | Identical electrical specs and package, but AEC-Q100 Grade 1 qualified with enhanced ESD (±2000 V HBM) and extended reliability testing. | Required for production automotive lighting; supports full automotive qualification documentation and PPAP support. | Choose LM3409HV-Q1 for OEM automotive programs where functional safety and supply-chain traceability are mandatory. |
Compared with LM3409MY/NOPB, LM3409HVMY/NOPB enables higher-input-voltage systems without redesign, while LM3409HV-Q1 adds automotive qualification rigor-making LM3409HVMY/NOPB the optimal balance of high-voltage capability and commercial-grade cost for non-automotive 48–72 V LED drivers.
Availability
LM3409HVMY/NOPB is available at Aetrix Electronics and suitable for automotive lighting, industrial high-bay fixtures, and UV-C disinfection modules requiring stable component supply across extended temperature and voltage ranges.
Supply support for LM3409HVMY/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 and embedded processing technologies, with decades of expertise in power management and LED driver innovation.
The LM3409HV product line was designed specifically for high-reliability, high-input-voltage LED current regulation in automotive and industrial environments, emphasizing simplicity, thermal robustness, and dimming flexibility without compensation networks.
FAQ
What is the maximum input voltage supported by the LM3409HVMY/NOPB?
The LM3409HVMY/NOPB supports a maximum input voltage of 75 V, as specified in the Absolute Maximum Ratings table of the SNVS602L datasheet. This rating allows reliable operation in 48 V systems and withstands automotive load-dump transients. Exceeding 75 V risks permanent damage, and operation above 75 V is not guaranteed even for short durations.
Does the LM3409HVMY/NOPB require external compensation components?
No, the LM3409HVMY/NOPB does not require external compensation components due to its Controlled Off-Time (COFT) architecture. This architecture inherently stabilizes the control loop across varying input/output conditions and loads, eliminating the need for compensation capacitors or resistors typically required in voltage-mode or current-mode controllers.
How is LED current adjusted on the LM3409HVMY/NOPB?
LED current is adjusted via the IADJ pin using one of three methods: leaving it open (sets 1.24 V reference → 248 mV sense threshold), applying 0–1.24 V analog voltage (linearly scales threshold 0–248 mV), or connecting a resistor to GND (5 µA current source sets VADJ). Each method directly determines the current sense threshold voltage (VCST), which sets ILED = VCST / RSNS.
What package type and thermal characteristics does the LM3409HVMY/NOPB use?
The LM3409HVMY/NOPB uses the 10-pin HVSSOP (DGQ) package with a 3.0 mm × 3.0 mm body and exposed thermal pad. Its junction-to-ambient thermal resistance (RθJA) is 54.4°C/W, and the thermal pad must be soldered to a GND plane using at least four thermal vias to achieve rated performance and sustain continuous 5 A LED current in real-world layouts.
Can the LM3409HVMY/NOPB support both analog and PWM dimming simultaneously?
Yes, the LM3409HVMY/NOPB supports simultaneous analog and PWM dimming: analog dimming is implemented via the IADJ pin (250:1 range), while PWM dimming uses the EN pin (10,000:1 range). The two methods operate independently-EN controls switching enable/disable timing, while IADJ adjusts the current threshold-enabling hybrid dimming strategies for enhanced resolution and flicker suppression in LM3409HVMY/NOPB-based designs.
LM3409HVMY/NOPB Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Texas Instruments
- Series:
- -
- Package/Case:
- 10-PowerTFSOP, 10-MSOP (0.118", 3.00mm Width)
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Active
- Type:
- DC DC Controller
- Topology:
- Step-Down (Buck)
- Internal Switch(s):
- No
- Number of Outputs:
- 1
- Voltage - Supply (Min):
- 6V
- Voltage - Supply (Max):
- 75V
- Voltage - Output:
- -
- Current - Output / Channel:
- -
- Frequency:
- -
- Dimming:
- Analog, PWM
- Applications:
- -
- Operating Temperature:
- -40°C ~ 125°C (TJ)
- Grade:
- Automotive
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- 10-HVSSOP
LM3409HVMY/NOPB FAQ
1.How can I place an order for LM3409HVMY/NOPB through Aetrix?
Please submit a Request for Quotation (RFQ) for LM3409HVMY/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 LM3409HVMY/NOPB reliable?
The price and inventory of LM3409HVMY/NOPB are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for LM3409HVMY/NOPB is usually 5 days.
3.What payment methods are accepted for LM3409HVMY/NOPB?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for LM3409HVMY/NOPB transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for LM3409HVMY/NOPB?
LM3409HVMY/NOPB orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your LM3409HVMY/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 LM3409HVMY/NOPB?
For technical support, including LM3409HVMY/NOPB datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your LM3409HVMY/NOPB requirements.
6.How does Aetrix verify that LM3409HVMY/NOPB is sourced from the original manufacturer or authorized distributors?
All LM3409HVMY/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 LM3409HVMY/NOPB meets industry standards.
7.What is the process for return or replacement of LM3409HVMY/NOPB?
All LM3409HVMY/NOPB units undergo pre-shipment inspection (PSI). If there is an issue with LM3409HVMY/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 LM3409HVMY/NOPB part is unused and in its original packaging.
Return procedure for LM3409HVMY/NOPB:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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