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Texas Instruments LM3409QHVMYX/NOPB
- Part No.:
- LM3409QHVMYX/NOPB
- Manufacturer:
- Texas Instruments
- Category:
- LED Drivers
- Package:
- 10-PowerTFSOP, 10-MSOP (0.118", 3.00mm Width)
- Datasheet:
-
LM3409QHVMYX/NOPB.pdf
- Description:
- IC LED DRIVER CTRLR PWM 10HVSSOP
- Quantity:
- Payment:
- Shipping:
Inventory:2,648
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Product details
Overview
LM3409QHVMYX/NOPB from Texas Instruments is a P-channel MOSFET buck controller for high-power LED drivers, operating from 6 V to 75 V input, featuring differential high-side current sensing, constant off-time (COFT) control, and 2-Ω peak gate drive. It delivers precise constant-current regulation up to 5 A in automotive lighting and industrial illumination systems.
For engineers reviewing the LM3409QHVMYX/NOPB datasheet, LM3409QHVMYX/NOPB pinout, LM3409QHVMYX/NOPB application, or LM3409QHVMYX/NOPB equivalent, key selection criteria include input voltage range (6–75 V), COFT architecture eliminating loop compensation, 10,000:1 PWM dimming, thermal shutdown, and HVSSOP-10 package with exposed DAP for enhanced thermal performance.
Technical Context
The LM3409QHVMYX/NOPB implements a Controlled Off-Time (COFT) architecture combining peak current detection with an output-voltage-dependent one-shot off-timer, enabling operation in both CCM and DCM without external compensation. Its differential high-side current sense uses polarity-swapping to cancel comparator offset, ensuring stable ±1% LED current accuracy across temperature.
It integrates a 6-V linear regulator (VCC) referenced to VIN, 1.24-V UVLO with 22-µA hysteresis current source, and logic-level EN pin supporting fast enable/disable and direct PWM dimming. The IADJ pin provides three configuration modes-open-circuit (1.24 V clamp), external voltage (0–1.24 V analog dimming), or resistor-to-GND-for adjustable current threshold from 0 to 248 mV.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VIN Range | 6 V to 75 V - supports wide-input automotive and industrial DC supplies without pre-regulation |
| Current Sense Threshold | Adjustable 0–248 mV via IADJ pin - enables analog dimming and precise current setting with external RSNS |
| PGATE Drive Strength | 2 Ω sourcing/sinking - drives P-FET gates with low propagation delay (<211 ns min ON-time) |
| PWM Dimming Range | 10,000:1 - achieves high-contrast lighting control using EN pin or external FET |
| Thermal Package | HVSSOP-10 with exposed thermal pad - 3.0 mm × 3.0 mm footprint; RθJA = 54.4°C/W enables >3 W dissipation at 25°C ambient |
| UVLO Threshold | 1.243 V (rising), 22 µA hysteresis current - ensures clean startup under varying input conditions |
| Shutdown Current | 110 µA - minimizes system standby power when EN < 0.5 V |
Pinout & Package
LM3409QHVMYX/NOPB is housed in a thermally enhanced 10-pin HVSSOP package (3.00 mm × 3.00 mm) with exposed DAP connected to GND for optimal heat dissipation.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 UVLO | Undervoltage lockout input | Resistor divider from VIN sets turn-on at 1.24 V; 22 µA hysteresis current enables precise threshold control |
| 2 VCC | VIN-referenced linear regulator output | Supplies internal circuitry and PGATE driver; requires ≥1 µF ceramic capacitor to VIN |
| 3 VIN | Main power input | Accepts 6–75 V; powers VCC regulator and PGATE driver; decoupling critical for stability |
| 4 EN | Enable and PWM dimming input | Logic-high (>1.74 V) enables operation; PWM signal directly modulates LED current |
| 5 COFF | Off-time programming node | RC network (ROFF + COFF) sets tOFF; timing depends on VO, enabling adaptive frequency control |
| 6 GND | System ground reference | Common return for CSN, CSP, VCC, and thermal pad; must be low-impedance |
| 7 PGATE | P-channel MOSFET gate driver output | Drives external high-side PFET; 2 Ω drive strength supports fast switching with minimal losses |
| 8 CSN | Negative current sense input | Connects to low side of RSNS; differential pair with CSP enables accurate high-side sensing |
| 9 CSP | Positive current sense input | Connects to high side of RSNS and VIN; forms differential pair with CSN for noise-immune sensing |
| 10 IADJ | Current threshold adjustment | Configurable as open-circuit (1.24 V clamp), voltage input (0–1.24 V), or resistor-to-GND for VCST scaling |
Key Features
| Feature | Design Value |
|---|---|
| No control loop compensation required | COFT architecture inherently stabilizes regulation across input/output variations without external RC networks |
| Differential high-side current sense | Eliminates ground-path interference and enables true high-side sensing with ±1% accuracy via polarity swapping |
| 10,000:1 PWM dimming range | EN pin accepts standard logic-level PWM signals up to 100 kHz, delivering industry-leading contrast in display/backlight applications |
| Thermally enhanced HVSSOP-10 | Exposed DAP with 4–6 vias to GND plane reduces junction-to-board thermal resistance to 33.8°C/W |
| Cycle-by-cycle current limit | Peak current detection triggers immediate PGATE turn-off, protecting external FET and LEDs during fault conditions |
Applications
| Automotive Headlamp Driver | Industrial High-Bay Lighting |
|---|---|
Use Scenario: Constant-current driver for 4–12 series white LEDs in 12/24/48 V vehicle electrical systems with load-dump transients. IC Role / Device Role / Timing Role: Buck controller regulating LED current up to 5 A using external P-FET and high-side RSNS sensing. Use Value: 6–75 V VIN range accommodates cold-crank (6 V) to load-dump (75 V); thermal shutdown prevents failure during enclosure overheating. | Use Scenario: High-efficiency LED driver for warehouse ceiling fixtures requiring >100,000-hour lifetime and flicker-free operation. IC Role / Device Role / Timing Role: Constant-current buck controller implementing analog dimming via IADJ voltage and PWM dimming via EN pin. Use Value: 10,000:1 PWM dimming enables smooth 0.01%–100% light output control; all-ceramic output capacitor support simplifies EMI filtering. |
| Streetlight LED Power Supply | UV-C Disinfection Module |
Use Scenario: Outdoor LED streetlight powered from 120/277 VAC via offline PFC front-end; requires robust overvoltage and thermal protection. IC Role / Device Role / Timing Role: Secondary-side buck controller managing constant current to high-power LED strings with programmable UVLO. Use Value: Adjustable UVLO (via R-divider on UVLO pin) rejects brownouts while surviving surges; 75 V max VIN handles PFC output ripple peaks. | Use Scenario: Precision current source for pulsed UV-C LEDs used in medical sterilization equipment requiring exact dose control. IC Role / Device Role / Timing Role: Fast-response buck controller enabling microsecond-scale current pulses via EN pin gating. Use Value: 21 ns EN-falling delay ensures rapid LED turn-off; cycle-by-cycle current limiting protects expensive UV-C emitters from overcurrent stress. |
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 |
|---|---|---|---|
| LM3410XMYX/NOPB | Lower VIN max (42 V vs 75 V); integrated N-FET switch instead of external P-FET controller | Suited for lower-input, space-constrained designs where integrated switch suffices | Select LM3410XMYX/NOPB only if input stays ≤42 V and board area favors integration over flexibility |
| TPS92691QPWPRQ1 | Automotive-grade LED controller with integrated op-amp for analog dimming; higher quiescent current (1.5 mA vs 2 mA active) | Designed specifically for AEC-Q100 Grade 0/1 automotive lighting with diagnostic features | Choose TPS92691QPWPRQ1 when functional safety diagnostics (LED open/short detection) are mandatory |
Compared with LM3409QHVMYX/NOPB, LM3410XMYX/NOPB trades input voltage headroom and external FET flexibility for smaller solution size, while TPS92691QPWPRQ1 adds automotive diagnostics at the cost of higher BOM count and reduced efficiency at light loads.
Availability
LM3409QHVMYX/NOPB is available at Aetrix Electronics and suitable for automotive lighting, industrial high-bay fixtures, and outdoor streetlight systems requiring stable component supply across extended temperature ranges and long production lifecycles.
Supply support for LM3409QHVMYX/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 company specializing in analog and embedded processing technologies, with leadership in power management ICs and automotive electronics.
The LM3409 family is designed as a high-voltage P-FET buck controller platform for constant-current LED driving in harsh environments, emphasizing wide VIN range, thermal resilience, and dimming flexibility without compensation components.
FAQ
What is the maximum input voltage supported by the LM3409QHVMYX/NOPB?
The LM3409QHVMYX/NOPB supports a maximum input voltage of 75 V, as specified in its absolute maximum ratings and recommended operating conditions. This high VIN capability makes it suitable for automotive applications with load-dump transients and industrial systems with wide-input unregulated supplies. Operation above 75 V risks permanent damage, and the device incorporates UVLO to prevent startup below 6 V.
How does the LM3409QHVMYX/NOPB achieve constant-current regulation without external compensation?
The LM3409QHVMYX/NOPB uses a Controlled Off-Time (COFT) architecture that combines peak current detection with an output-voltage-dependent off-timer. This hysteretic control method inherently stabilizes regulation across line and load variations, eliminating the need for external compensation components like type-II or type-III error amplifiers. The result is simplified design, faster transient response, and reliable operation with all-ceramic output capacitors.
Can the LM3409QHVMYX/NOPB be used for analog dimming, and how is it implemented?
Yes, the LM3409QHVMYX/NOPB supports analog dimming via its multi-function IADJ pin. Applying a voltage from 0 V to 1.24 V to IADJ scales the current sense threshold (VCST) linearly from 0 mV to 248 mV, directly adjusting LED current. This enables smooth, low-frequency brightness control without PWM artifacts. The datasheet confirms 250:1 analog dimming range, verified across temperature and input voltage.
What package type and thermal characteristics does the LM3409QHVMYX/NOPB use?
The LM3409QHVMYX/NOPB is packaged in a 10-pin HVSSOP with an exposed thermal pad (DAP). Its thermal metrics include RθJA = 54.4°C/W and RθJB = 33.8°C/W, enabling robust thermal performance in compact layouts. TI recommends connecting the DAP to the PCB ground plane using 4–6 thermal vias to maximize heat transfer and sustain continuous operation at full load in ambient temperatures up to +125°C junction.
Is the LM3409QHVMYX/NOPB qualified for automotive applications?
No, the LM3409QHVMYX/NOPB is not AEC-Q100 qualified. It belongs to the LM3409HV family, which lacks automotive grade certification. For automotive use, TI specifies the LM3409HV-Q1 variant - identical functionality but tested per AEC-Q100 Grade 1 (−40°C to +125°C) with enhanced HBM ESD rating (±2000 V). Designers requiring automotive qualification must select LM3409HV-Q1 or equivalent qualified alternatives.
LM3409QHVMYX/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
LM3409QHVMYX/NOPB FAQ
1.How can I place an order for LM3409QHVMYX/NOPB through Aetrix?
Please submit a Request for Quotation (RFQ) for LM3409QHVMYX/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 LM3409QHVMYX/NOPB reliable?
The price and inventory of LM3409QHVMYX/NOPB are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for LM3409QHVMYX/NOPB is usually 5 days.
3.What payment methods are accepted for LM3409QHVMYX/NOPB?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for LM3409QHVMYX/NOPB transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for LM3409QHVMYX/NOPB?
LM3409QHVMYX/NOPB orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your LM3409QHVMYX/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 LM3409QHVMYX/NOPB?
For technical support, including LM3409QHVMYX/NOPB datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your LM3409QHVMYX/NOPB requirements.
6.How does Aetrix verify that LM3409QHVMYX/NOPB is sourced from the original manufacturer or authorized distributors?
All LM3409QHVMYX/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 LM3409QHVMYX/NOPB meets industry standards.
7.What is the process for return or replacement of LM3409QHVMYX/NOPB?
All LM3409QHVMYX/NOPB units undergo pre-shipment inspection (PSI). If there is an issue with LM3409QHVMYX/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 LM3409QHVMYX/NOPB part is unused and in its original packaging.
Return procedure for LM3409QHVMYX/NOPB:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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