LM3424QMH/NOPB Texas Instruments Integrated Circuit (Small Outline Packages) In Stock
LM3424QMH/NOPB is an AEC-Q100 qualified N-channel MOSFET LED constant-current controller with thermal foldback protection, supporting buck, boost, and SEPIC topologies from 4.5 V to 75 V input in a 20-pin HTSSOP package. It drives high-power LED strings with analog and PWM dimming and reduces LED current automatically when the IC junction temperature rises. Available from stock with worldwide shipping.
- Manufacturer
- Texas Instruments
- Package
- Small Outline Packages
- Pin Count
- 20
- Lifecycle
- ACTIVE
- Datasheet
- LM3424QMH/NOPB Datasheet PDF
- Category
- Integrated Circuit
- Price
- From $1.6000(MOQ 1)
- Temp Range
- -40.0°C to 125.0°C
- RoHS
- Compliant
- Lead Time
- 3–7 business days
- Shipping
- DHL Express · Worldwide
What are the key features of LM3424QMH/NOPB?
- AEC-Q100 Grade 1 automotive-qualified LED driver rated from -40 °C to +125 °C junction temperature
- 4.5 V to 75 V input range supporting 12 V, 24 V, and 48 V automotive and industrial bus voltages
- Thermal foldback reduces LED current proportionally as junction temperature rises above 120 °C threshold
- Supports buck, boost, and SEPIC topologies with analog and PWM dimming via a single IC
What is LM3424QMH/NOPB used for?
LM3424QMH/NOPB is used in automotive exterior and interior LED lighting systems including headlamps, daytime running lights, and rear combination lamps that operate from a 12 V or 24 V vehicle bus. Its wide 4.5 V to 75 V input range and AEC-Q100 qualification make it suitable for commercial truck and bus lighting applications subject to load-dump transients. Industrial LED luminaire designers also use it in high-bay warehouse fixtures and architectural lighting where thermal foldback prevents LED degradation during enclosure temperature excursions.
What are the specifications of LM3424QMH/NOPB?
| Pbfree Code | Yes |
| YTEOL | 15 |
| Input Characteristics | STANDARD |
| Interface IC Type | LED DISPLAY DRIVER |
| JESD-30 Code | R-PDSO-G20 |
| JESD-609 Code | e3 |
| Multiplexed Display Capability | NO |
| Number of Channels | 1 |
| Number of Functions | 1 |
| Number of Segments | 1 |
| Output Characteristics | CONSTANT-CURRENT |
| Package Body Material | PLASTIC/EPOXY |
| Package Shape | RECTANGULAR |
| Package Style | SMALL OUTLINE, HEAT SINK/SLUG, SHRINK PITCH |
| Peak Reflow Temperature (Cel) | 260 |
| Qualification Status | Not Qualified |
| Screening Level | AEC-Q100 |
| Supply Voltage-Max | 75V |
| Supply Voltage-Min | 4.5V |
| Supply Voltage-Nom | 14V |
| Surface Mount | YES |
| Temperature Grade | AUTOMOTIVE |
| Terminal Finish | Matte Tin (Sn) |
| Terminal Form | GULL WING |
| Terminal Pitch | 0.65mm |
| Terminal Position | DUAL |
| Time@Peak Reflow Temperature-Max (s) | 30 |
| fmax-Min | 2MHz |
| Package | Small Outline Packages |
Compliance & Regulatory
| RoHS Status | Compliant |
| Lead-Free | Yes (Pb-Free) |
| Moisture Sensitivity Level | MSL 1 |
| ECCN | EAR99 |
| HTS Code | 8542.39.00.90 |
Where can I find the LM3424QMH/NOPB datasheet?
LM3424QMH/NOPB Datasheet DownloadOfficial datasheet from Texas Instruments
What are equivalent replacements for LM3424QMH/NOPB?
No known alternates. Submit an RFQ and our team can suggest alternatives.
Frequently Asked Questions
What is the thermal foldback feature of LM3424QMH/NOPB, and at what temperature does it activate?
LM3424QMH/NOPB monitors its internal junction temperature and begins reducing the LED string current proportionally when the junction temperature exceeds approximately 120 °C. This thermal foldback prevents the LED string from operating at full current during thermal runaway conditions, protecting both the controller IC and the LED emitters from damage in enclosed automotive or industrial luminaire housings without requiring an external NTC thermistor.
Which converter topologies can be built around LM3424QMH/NOPB for automotive LED strings?
LM3424QMH/NOPB supports buck, boost, and SEPIC converter topologies using a single N-channel MOSFET and the same 20-pin HTSSOP footprint. A buck topology steps down from a 24 V truck bus to drive a 12 V LED string, while a boost topology steps up from a discharged 9 V battery to maintain constant current through a 14 V string, giving designers topology flexibility across a 4.5 V to 75 V input range.
How does LM3424QMH/NOPB achieve precise LED dimming in an automotive interior lighting application?
LM3424QMH/NOPB supports both analog dimming via a DC voltage applied to the IADJ pin and PWM dimming via a logic-level signal that enables or disables the switching output. PWM dimming at frequencies above 200 Hz is imperceptible to the human eye, enabling smooth 0 to 100 % brightness control of interior ambient LED strips. Analog dimming is used for precise low-brightness settings below 10 % duty cycle where PWM flicker artifacts may otherwise be visible.
Why is AEC-Q100 Grade 1 qualification important when selecting LM3424QMH/NOPB for a vehicle headlamp?
AEC-Q100 Grade 1 qualification certifies that LM3424QMH/NOPB has passed stringent reliability stress tests including temperature cycling from -40 °C to +125 °C junction, high-temperature operating life at 1000 hours, and electrostatic discharge to 2 kV Human Body Model. Automotive OEM sourcing requirements for safety-related lighting systems mandate AEC-Q100 Grade 1 components to ensure the headlamp controller maintains specified performance over a 15-year vehicle lifetime.
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About Texas Instruments
Texas Instruments (TI) is a global semiconductor company headquartered in Dallas, Texas. TI designs and manufactures analog and embedded processing chips used in industrial, automotive, consumer, communications, and enterprise systems.
More from Texas Instruments
| Qty. | Unit Price | Ext. Price |
|---|---|---|
| 1+ | $3.4900 | $3.49 |
| 5+ | $3.3100 | $16.55 |
| 25+ | $2.8800 | $72.00 |
| 87+ | $2.6807 | $233.22 |
| 374+ | $2.3909 | $894.20 |
| 500+ | $1.6000 | $800.00 |
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