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Texas Instruments LM3409QHVMY/NOPB
- Part No.:
- LM3409QHVMY/NOPB
- Manufacturer:
- Texas Instruments
- Category:
- LED Drivers
- Package:
- 10-PowerTFSOP, 10-MSOP (0.118", 3.00mm Width)
- Datasheet:
-
LM3409QHVMY/NOPB.pdf
- Description:
- IC LED DRIVER CTRLR PWM 10HVSSOP
- Quantity:
- Payment:
- Shipping:
Inventory:14,827
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Product details
Overview
LM3409QHVMY/NOPB from Texas Instruments is a P-channel MOSFET buck controller for high-power LED current regulation, supporting 6 V to 75 V input, differential high-side current sensing with 198 mV typical threshold, constant off-time (COFT) control, and up to 5 A output current in optimized designs. It enables automotive lighting systems requiring robust thermal performance and wide VIN range.
For engineers reviewing the LM3409QHVMY/NOPB datasheet, LM3409QHVMY/NOPB pinout, LM3409QHVMY/NOPB application, or LM3409QHVMY/NOPB equivalent, key selection criteria include its 75 V max input rating, HVSSOP-10 thermally enhanced package, COFT architecture eliminating loop compensation, 10,000:1 PWM dimming capability, and AEC-Q100 Grade 1 qualification for automotive use.
Technical Context
The LM3409QHVMY/NOPB implements a Controlled Off-Time (COFT) hysteretic control architecture combining peak current detection with an output-voltage-dependent off-timer. It uses polarity-swapped differential sensing to cancel comparator offset error and achieves cycle-by-cycle current limiting without external compensation.
Its high-side current sense operates with adjustable 0–248 mV threshold via the IADJ pin, enabling analog dimming; EN pin supports logic-level enable, low-power shutdown (<110 µA), and direct PWM dimming; PGATE delivers 1-A peak drive into a P-FET gate with 2 Ω source/sink resistance.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Input Voltage Range | 6 V to 75 V - supports 24 V, 48 V, and 60 V industrial/automotive bus rails without pre-regulation. |
| Current Sense Threshold | 198 mV typical - sets LED current via external sense resistor; adjustable from 0 to 248 mV using IADJ pin. |
| Peak Gate Drive Current | 1 A - drives large P-channel MOSFETs with fast turn-on/turn-off, minimizing switching losses. |
| PWM Dimming Range | 10,000:1 - enables high-contrast brightness control in headlight and display backlight applications. |
| Package Thermal Resistance | RθJA = 54.4 °C/W (HVSSOP-10) - enables >2 W dissipation at 25 °C ambient with standard PCB copper. |
| Operating Junction Temp | −40 °C to +125 °C - qualified for under-hood automotive environments and industrial enclosures. |
| UVLO Threshold | 1.243 V (rising) - programmable via resistor divider on UVLO pin for precise input rail monitoring. |
Pinout & Package
LM3409QHVMY/NOPB is housed in a thermally enhanced 10-pin HVSSOP (DGQ) package, 3.00 mm × 3.00 mm body size, with exposed thermal pad connected to GND for optimal heat transfer.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 UVLO | Undervoltage lockout input | Resistor divider input; 1.243 V threshold triggers startup; 22 µA hysteresis current enables clean release. |
| 2 IADJ | Analog current adjust | Sets current sense threshold (0–248 mV); open-circuit = 1.243 V; voltage or resistor programming enables analog dimming. |
| 3 EN | Enable / PWM dimming input | Logic-level interface: >1.74 V enables, <0.5 V shuts down (110 µA ISD), PWM signal directly dims LEDs. |
| 4 COFF | Off-time timing node | Connects ROFF and COFF to set tOFF; exponential charging yields ~300 µs max off-time when VO < 1.24 V. |
| 5 GND | Power ground reference | System return path for CSP/CSN sense, VCC regulator, and thermal pad connection point. |
| 6 PGATE | P-FET gate driver output | 1-A peak, 2 Ω drive strength; directly controls external high-side P-channel switch (e.g., DMP3099L). |
| 7 CSN | Negative current sense input | High-side differential sense negative terminal; connects to low side of RSNS; 38 ns delay vs PGATE rise. |
| 8 CSP | Positive current sense input | High-side differential sense positive terminal; connects to high side of RSNS and VIN node. |
| 9 VCC | Internal LDO output | 6 V ±0.5 V regulated supply for internal circuitry and gate driver; requires ≥1 µF ceramic capacitor to VIN. |
| 10 VIN | Main power input | 6–75 V DC input; powers internal 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 - reduces BOM count and layout sensitivity. |
| Differential high-side current sensing | Rejects common-mode noise and ground bounce; enables accurate current regulation independent of load ground potential. |
| 10,000:1 PWM dimming range | Supports high-fidelity brightness control in automotive adaptive driving beams (ADB) and architectural lighting. |
| Thermally enhanced HVSSOP-10 package | Exposed thermal pad with 4–6 vias to inner GND plane enables >2.5 W continuous power dissipation at TA = 85 °C. |
| AEC-Q100 Grade 1 qualification | Rated for −40 °C to +125 °C operation - validated for front-end lighting, daytime running lights (DRL), and fog lamps. |
Applications
| Automotive Headlights | Industrial High-Bay Lighting |
|---|---|
Use Scenario: Adaptive LED headlight modules requiring precise current regulation across 9–16 V battery and 60 V load-dump transients. IC Role / Device Role / Timing Role: Buck controller managing P-FET switch, high-side current sensing, and EN-based PWM dimming for beam shaping. Use Value: 75 V input rating withstands ISO 7637-2 pulse 5a; COFT control ensures stable current during rapid voltage transients. |
Use Scenario: 100–200 W LED fixtures operating from 48 V DC microgrids in warehouses and factories. IC Role / Device Role / Timing Role: Constant-current buck controller regulating multi-string LED arrays with analog dimming via 0–10 V interface. Use Value: Differential sensing rejects ground noise from shared AC/DC converters; HVSSOP thermal pad sustains >3 W dissipation at 60 °C ambient. |
| Commercial Display Backlighting | Emergency Vehicle Lighting |
Use Scenario: Large-format LCD signage with uniform edge-lit LED bars requiring flicker-free dimming over 4–20 V input range. IC Role / Device Role / Timing Role: High-efficiency buck controller implementing 100 kHz PWM dimming via EN pin for zero-flicker operation. Use Value: 10,000:1 dimming ratio enables deep black levels; no-compensation design simplifies EMI filtering for CE compliance. |
Use Scenario: Flashing LED warning beacons powered from 12/24 V vehicle batteries with frequent cold cranking events. IC Role / Device Role / Timing Role: Robust LED driver maintaining constant current during 3 V brownouts and 100 V spikes. Use Value: 6 V start-up and UVLO hysteresis prevent erratic behavior during engine start; thermal shutdown protects against enclosure overheating. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar LED buck controller applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| LM3410XMY/NOPB | Lower 42 V max input; no AEC-Q100 qualification; same HVSSOP-10 package and COFT architecture. | Suitable for non-automotive 24 V systems only; lacks UVLO programmability and thermal shutdown flag. | Select when cost-sensitive industrial lighting requires ≤42 V input and Grade 1 qualification is unnecessary. |
| TPS92692QPWPRQ1 | Integrated high-side N-FET driver; 65 V max input; current sense amplifier with gain; I²C interface. | Enables closed-loop diagnostics and digital dimming; higher BOM cost and layout complexity than LM3409QHVMY/NOPB. | Choose for ASIL-B systems needing fault reporting, or where integrated FET eliminates external MOSFET selection effort. |
Compared with LM3409QHVMY/NOPB, LM3410XMY/NOPB offers identical topology at lower voltage rating and cost but no automotive qualification, while TPS92692QPWPRQ1 adds digital control and integrated drive at the expense of external component count reduction and higher system integration overhead.
Availability
LM3409QHVMY/NOPB is available at Aetrix Electronics and suitable for automotive lighting, industrial high-bay fixtures, and commercial display backlighting requiring stable component supply across extended temperature and voltage ranges.
Supply support for LM3409QHVMY/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 delivering analog, embedded processing, and connectivity solutions with emphasis on reliability, efficiency, and automotive-grade validation.
LM3409QHVMY/NOPB belongs to TI's high-voltage LED controller product line, designed specifically for robust, high-current buck regulation in safety-critical automotive and industrial lighting applications.
FAQ
What is the maximum input voltage supported by the LM3409QHVMY/NOPB?
The LM3409QHVMY/NOPB supports a maximum input voltage of 75 V, as specified in its absolute maximum ratings and recommended operating conditions. This makes it suitable for 48 V and 60 V industrial systems and automotive applications subject to load-dump transients per ISO 7637-2. Operation above 75 V risks permanent damage.
Does the LM3409QHVMY/NOPB require external compensation components?
No, the LM3409QHVMY/NOPB uses a Controlled Off-Time (COFT) hysteretic control architecture that inherently provides stability without external compensation components. Its constant off-time regulation and cycle-by-cycle current limiting eliminate the need for feedback loop capacitors or resistors, simplifying design and improving transient response.
How is analog dimming implemented on the LM3409QHVMY/NOPB?
Analog dimming on the LM3409QHVMY/NOPB is implemented via the IADJ pin: applying a voltage between 0 V and 1.24 V sets the current sense threshold from 0 mV to 248 mV, linearly scaling LED current. Alternatively, connecting a resistor from IADJ to GND sets threshold using the internal 5 µA current source, enabling simple potentiometer-based dimming.
What package type and thermal characteristics does the LM3409QHVMY/NOPB use?
The LM3409QHVMY/NOPB uses the 10-pin HVSSOP (DGQ) package with 3.00 mm × 3.00 mm body and exposed thermal pad. Its junction-to-ambient thermal resistance is 54.4 °C/W, and thermal pad must be connected to GND via 4–6 vias to achieve rated power dissipation and maintain operation within −40 °C to +125 °C junction range.
Is the LM3409QHVMY/NOPB qualified for automotive applications?
Yes, the LM3409QHVMY/NOPB is AEC-Q100 Grade 1 qualified, meaning it is tested and certified for operation from −40 °C to +125 °C ambient and meets stringent automotive reliability, ESD, and transient immunity requirements. It is explicitly intended for front-end lighting, DRL, and fog lamp systems.
LM3409QHVMY/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:
- AEC-Q100
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- 10-HVSSOP
LM3409QHVMY/NOPB FAQ
1.How can I place an order for LM3409QHVMY/NOPB through Aetrix?
Please submit a Request for Quotation (RFQ) for LM3409QHVMY/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 LM3409QHVMY/NOPB reliable?
The price and inventory of LM3409QHVMY/NOPB are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for LM3409QHVMY/NOPB is usually 5 days.
3.What payment methods are accepted for LM3409QHVMY/NOPB?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for LM3409QHVMY/NOPB transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for LM3409QHVMY/NOPB?
LM3409QHVMY/NOPB orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your LM3409QHVMY/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 LM3409QHVMY/NOPB?
For technical support, including LM3409QHVMY/NOPB datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your LM3409QHVMY/NOPB requirements.
6.How does Aetrix verify that LM3409QHVMY/NOPB is sourced from the original manufacturer or authorized distributors?
All LM3409QHVMY/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 LM3409QHVMY/NOPB meets industry standards.
7.What is the process for return or replacement of LM3409QHVMY/NOPB?
All LM3409QHVMY/NOPB units undergo pre-shipment inspection (PSI). If there is an issue with LM3409QHVMY/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 LM3409QHVMY/NOPB part is unused and in its original packaging.
Return procedure for LM3409QHVMY/NOPB:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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