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Texas Instruments LM3409HVMYX/NOPB
- Part No.:
- LM3409HVMYX/NOPB
- Manufacturer:
- Texas Instruments
- Category:
- LED Drivers
- Package:
- 10-PowerTFSOP, 10-MSOP (0.118", 3.00mm Width)
- Datasheet:
-
LM3409HVMYX/NOPB.pdf
- Description:
- IC LED DRIVER CTRLR PWM 10HVSSOP
- Quantity:
- Payment:
- Shipping:
Inventory:5,767
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Product details
Overview
LM3409HVMYX/NOPB from Texas Instruments is a high-voltage P-channel MOSFET buck controller for constant-current LED drivers, supporting 6 V to 75 V input, differential high-side current sensing with 198 mV typical threshold, 2 Ω peak gate drive, and 10,000:1 PWM dimming - deployed in automotive headlamps and industrial high-brightness LED arrays.
For engineers reviewing the LM3409HVMYX/NOPB datasheet, LM3409HVMYX/NOPB pinout, LM3409HVMYX/NOPB application, or LM3409HVMYX/NOPB equivalent, key selection criteria include UVLO programmability (1.24 V threshold), COFT architecture eliminating loop compensation, thermal shutdown, and compatibility with all-ceramic output capacitors in thermally enhanced HVSSOP-10 packaging.
Technical Context
The LM3409HVMYX/NOPB implements a Controlled Off-Time (COFT) hysteretic control architecture that regulates LED current by dynamically adjusting switching frequency via external ROFF/COFF timing components and output voltage feedback - enabling stable operation in both CCM and DCM without external compensation. Its differential high-side current sense amplifier alternates input polarity each cycle to cancel offset error, ensuring accurate average current regulation up to 5 A.
It integrates a 6 V linear regulator (VCC) referenced to VIN, delivering up to 45 mA for gate drive and internal circuitry, with undervoltage lockout on both VIN (via UVLO pin) and VCC (3.73 V threshold). The EN pin supports logic-level enable, analog dimming via IADJ voltage, and direct PWM dimming at frequencies up to 100 kHz.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VIN Range | 6 V to 75 V - supports 24 V, 48 V, and 60 V industrial/automotive bus rails without external step-down. |
| Current Sense Threshold | 198 mV typical (VCST) - sets LED current via RSNS; adjustable from 0–248 mV using IADJ pin voltage or resistor. |
| Gate Drive Strength | 2 Ω sourcing/sinking - drives P-MOSFET gates directly with 1-A peak current, minimizing external driver needs. |
| PWM Dimming Range | 10,000:1 - enables high-contrast lighting control in automotive adaptive driving beams (ADB) and signage. |
| Off-Time Programmability | ROFF + COFF + VO - determines tOFF (up to 300 µs max); enables ripple control and CCM/DCM mode selection. |
| Thermal Shutdown | 150 °C junction - protects against overtemperature in enclosed LED modules and high-power density designs. |
| Package | HVSSOP-10 (3.0 mm × 3.0 mm) with exposed thermal pad - achieves 54.4 °C/W θJA for compact, high-power LED driver PCBs. |
Pinout & Package
LM3409HVMYX/NOPB uses a thermally enhanced 10-pin HVSSOP package (3.00 mm × 3.00 mm) with an exposed thermal pad connected to GND for efficient heat dissipation in high-current LED driver applications.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 UVLO | Input undervoltage lockout reference | Resistor divider input; 1.24 V turn-on threshold with 22 µA hysteresis current - sets system brown-out point. |
| 2 IADJ | Analog current adjust | Sets VCST from 0–248 mV via voltage (0–1.24 V) or resistor-to-GND - enables analog dimming and precision current scaling. |
| 3 EN | Enable / PWM dimming input | Logic-level control: >1.74 V enables, <0.5 V shuts down, PWM signal applied directly for 10,000:1 dimming. |
| 4 COFF | Controlled off-time timing | Connects to ROFF and COFF; charges exponentially to 1.24 V threshold - defines tOFF and switching frequency. |
| 5 GND | Power and signal ground | System return path; thermal pad must be connected to GND plane via ≥4 vias for thermal performance. |
| 6 PGATE | P-MOSFET gate driver output | Drives external high-side P-channel switch; 2 Ω drive strength supports fast turn-on/turn-off with low gate charge FETs. |
| 7 CSN | Negative current sense input | Connects to low side of RSNS; used with CSP for differential high-side sensing - rejects common-mode noise. |
| 8 CSP | Positive current sense input | Connects to high side of RSNS and VIN - enables true high-side sensing without shunt ground disruption. |
| 9 VCC | VIN-referenced linear regulator output | 6 V ±0.5 V output powering internal logic and gate drive; requires ≥1 µF ceramic capacitor to VIN. |
| 10 VIN | Main power input | 6–75 V supply input; powers VCC regulator and provides reference for UVLO, CSP, and PGATE drive. |
Key Features
| Feature | Design Value |
|---|---|
| No control loop compensation required | COFT architecture eliminates need for external compensation network - reduces BOM count and design iteration time. |
| Differential high-side current sensing | Rejects common-mode noise and avoids ground-path disruption - maintains accuracy in multi-string LED systems. |
| Cycle-by-cycle current limit | Hardware-based peak current detection prevents inductor saturation and MOSFET failure during transients or short circuits. |
| Supports capacitor-less outputs | Stable with zero output capacitance - enables ultra-compact designs where EMI filtering is handled externally. |
| Thermally enhanced HVSSOP-10 | θJA = 54.4 °C/W enables 3 W+ continuous power dissipation in 10 mm² footprint - ideal for space-constrained LED modules. |
Applications
| Automotive Headlamp Systems | Industrial High-Bay Lighting |
|---|---|
Use Scenario: Adaptive front-lighting systems (AFS) requiring precise, high-dynamic-range current control across multiple LED strings under wide battery voltage variation (9–16 V nominal, up to 75 V load dump). IC Role / Device Role / Timing Role: Constant-current buck controller regulating up to 5 A per channel with fast EN-based PWM dimming for matrix beam shaping. Use Value: Enables 10,000:1 contrast ratio and sub-millisecond response for glare-free ADB functionality without external op-amps or compensation. |
Use Scenario: 100–200 W LED luminaires operating from 48 V DC microgrids in warehouses and factories, demanding high efficiency (>92%) and thermal robustness. IC Role / Device Role / Timing Role: Primary current regulator in non-isolated buck topology, managing thermal stress via HVSSOP-10 thermal pad and cycle-by-cycle current limiting. Use Value: Delivers stable 3.5 A output with <±3% current accuracy across –40°C to +125°C ambient - reducing thermal derating overhead. |
| UV-C Sterilization Modules | Stage & Architectural Accent Lighting |
Use Scenario: High-intensity UVC LED arrays (265 nm) requiring tightly regulated current to maintain germicidal efficacy and prevent LED degradation at elevated junction temperatures. IC Role / Device Role / Timing Role: Constant-current source with differential sensing and thermal shutdown - ensures safe operation during extended duty cycles. Use Value: Maintains ±1.5% current stability over temperature via polarity-swapped current sense comparator - critical for dose consistency. |
Use Scenario: RGBW tunable white fixtures needing independent analog dimming per channel with minimal component count and layout area. IC Role / Device Role / Timing Role: Buck controller per color channel, using IADJ voltage for smooth 250:1 analog dimming without flicker or color shift. Use Value: Eliminates need for separate DACs or current mirrors - simplifies 4-channel driver design while preserving color fidelity. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar P-FET buck controller applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| LM3409MYX/NOPB | 42 V max VIN (vs. 75 V); identical pinout, features, and COFT architecture. | Suitable for 24 V systems only; not rated for automotive load dump or 48 V industrial rails. | Select LM3409HVMYX/NOPB when input exceeds 42 V; otherwise LM3409MYX/NOPB offers cost parity in lower-voltage designs. |
| TPS92691QPWPRQ1 | Integrated N-MOSFET gate driver + current sense amplifier; 65 V max VIN; requires external compensation. | Designed for high-side N-FET buck with integrated current mirror; supports I2C programming and fault reporting. | Choose TPS92691QPWPRQ1 for smart LED drivers needing diagnostics and digital interface; LM3409HVMYX/NOPB remains preferred for simplicity, cost, and analog dimming purity. |
Compared with LM3409MYX/NOPB and TPS92691QPWPRQ1, LM3409HVMYX/NOPB uniquely combines 75 V operation, zero-compensation COFT control, and HVSSOP-10 thermal performance - making it optimal for high-input-voltage, high-reliability LED drivers where BOM minimization and analog dimming fidelity are prioritized.
Availability
LM3409HVMYX/NOPB is available at Aetrix Electronics and suitable for automotive lighting, industrial high-bay luminaires, and UV-C sterilization modules requiring stable component supply across extended temperature and voltage ranges.
Supply support for LM3409HVMYX/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.
LM3409HVMYX/NOPB belongs to TI's high-voltage LED controller product line, engineered specifically for robust, high-efficiency constant-current regulation in automotive, industrial, and medical lighting applications where input voltage resilience and thermal performance are critical.
FAQ
What is the maximum input voltage supported by the LM3409HVMYX/NOPB?
The LM3409HVMYX/NOPB supports a maximum input voltage of 75 V, as specified in its absolute maximum ratings and recommended operating conditions. This rating enables use in 48 V industrial systems and automotive applications subject to load dump transients. Operation above 75 V risks permanent damage; the device enters UVLO below 6 V. The LM3409HVMYX/NOPB is distinct from the standard LM3409 (42 V max), and this higher voltage capability is inherent to the HV variant.
How does the LM3409HVMYX/NOPB achieve constant-current regulation without external compensation?
The LM3409HVMYX/NOPB uses a Controlled Off-Time (COFT) hysteretic control architecture that inherently regulates LED current by sensing peak inductor current and setting off-time via external ROFF/COFF components. This eliminates the need for traditional voltage-mode or current-mode loop compensation networks. The LM3409HVMYX/NOPB's COFT design provides fast transient response and stable operation across CCM and DCM - confirmed in TI's SNVS602L datasheet Section 8.3.2.
Can the LM3409HVMYX/NOPB drive N-channel MOSFETs?
No, the LM3409HVMYX/NOPB is designed exclusively as a P-channel high-side MOSFET controller. Its PGATE output is referenced to VIN and optimized for sourcing current into a P-FET gate. Driving an N-FET would require level-shifting and is unsupported. For N-FET buck controllers, TI recommends alternatives such as the TPS92691 or LM3406 - but those are functionally distinct from the LM3409HVMYX/NOPB.
What is the role of the IADJ pin on the LM3409HVMYX/NOPB?
The IADJ pin on the LM3409HVMYX/NOPB sets the current sense threshold voltage (VCST) for the high-side differential amplifier. It supports three configurations: open-circuit (1.24 V clamp → 248 mV VCST), external voltage (0–1.24 V → 0–248 mV VCST), or resistor-to-GND (5 µA × REXT → VCST). This enables precise analog dimming and current scaling - a core feature distinguishing the LM3409HVMYX/NOPB from fixed-threshold controllers.
Is the LM3409HVMYX/NOPB qualified for automotive applications?
No, the LM3409HVMYX/NOPB is not AEC-Q100 qualified. Only the LM3409HV-Q1 variant carries Grade 1 qualification (–40°C to +125°C TJ, enhanced ESD, and automotive-specific testing). While the LM3409HVMYX/NOPB shares identical electrical specs and HVSSOP-10 packaging, it lacks the automotive qualification documentation and screening - making it suitable for industrial and commercial LED drivers but not safety-critical automotive systems.
LM3409HVMYX/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
LM3409HVMYX/NOPB FAQ
1.How can I place an order for LM3409HVMYX/NOPB through Aetrix?
Please submit a Request for Quotation (RFQ) for LM3409HVMYX/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 LM3409HVMYX/NOPB reliable?
The price and inventory of LM3409HVMYX/NOPB are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for LM3409HVMYX/NOPB is usually 5 days.
3.What payment methods are accepted for LM3409HVMYX/NOPB?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for LM3409HVMYX/NOPB transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for LM3409HVMYX/NOPB?
LM3409HVMYX/NOPB orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your LM3409HVMYX/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 LM3409HVMYX/NOPB?
For technical support, including LM3409HVMYX/NOPB datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your LM3409HVMYX/NOPB requirements.
6.How does Aetrix verify that LM3409HVMYX/NOPB is sourced from the original manufacturer or authorized distributors?
All LM3409HVMYX/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 LM3409HVMYX/NOPB meets industry standards.
7.What is the process for return or replacement of LM3409HVMYX/NOPB?
All LM3409HVMYX/NOPB units undergo pre-shipment inspection (PSI). If there is an issue with LM3409HVMYX/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 LM3409HVMYX/NOPB part is unused and in its original packaging.
Return procedure for LM3409HVMYX/NOPB:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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