LM3431QMH Texas Instruments Integrated Circuit (Small Outline Packages) In Stock
The LM3431QMH is a 3-channel constant-current LED driver IC from Texas Instruments supporting 4.5 V to 36 V input and PWM current-mode control. It delivers precise LED current regulation across three independent channels. From $2.20, in stock, worldwide shipping.
- Manufacturer
- Texas Instruments
- Package
- Small Outline Packages
- Pin Count
- 28
- Lifecycle
- OBSOLETE
- Datasheet
- LM3431QMH Datasheet PDF
- Category
- Integrated Circuit
- 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 LM3431QMH?
- 3 independent constant-current channels for precise, balanced LED string control
- Wide 4.5 V to 36 V input voltage range supporting automotive and industrial LED backlighting
- PWM current-mode control for fast transient response and stable dimming across full brightness range
What is LM3431QMH used for?
The LM3431QMH is designed for automotive display backlighting and industrial panel illumination requiring tight current matching across 3 LED channels. Its 4.5 V to 36 V input range makes it suitable for 12 V vehicle bus systems and wide-input industrial equipment. It is also used in signage, status indicators, and architectural lighting systems where consistent multi-channel LED brightness is critical.
What are the specifications of LM3431QMH?
| YTEOL | 0 |
| Analog IC - Other Type | SWITCHING CONTROLLER |
| Control Mode | CURRENT-MODE |
| Control Technique | PULSE WIDTH MODULATION |
| Input Voltage-Max | 36V |
| Input Voltage-Min | 4.5V |
| Input Voltage-Nom | 12V |
| JESD-30 Code | R-PDSO-G28 |
| JESD-609 Code | e0 |
| Number of Functions | 1 |
| Output Current-Max | 0.7A |
| Package Body Material | PLASTIC/EPOXY |
| Package Equivalence Code | TSSOP28,.25 |
| 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 |
| Surface Mount | YES |
| Switcher Configuration | SINGLE |
| Switching Frequency-Max | 1100kHz |
| Technology | BICMOS |
| Temperature Grade | AUTOMOTIVE |
| Terminal Finish | TIN LEAD |
| Terminal Form | GULL WING |
| Terminal Pitch | 0.65mm |
| Terminal Position | DUAL |
| Time@Peak Reflow Temperature-Max (s) | 40 |
| Package | Small Outline Packages |
Compliance & Regulatory
| RoHS Status | Compliant |
| Lead-Free | Yes (Pb-Free) |
| Moisture Sensitivity Level | MSL 1 |
| ECCN | EAR99 |
| HTS Code | 8542.39.00.60 |
Where can I find the LM3431QMH datasheet?
LM3431QMH Datasheet DownloadOfficial datasheet from Texas Instruments
What are equivalent replacements for LM3431QMH?
No known alternates. Submit an RFQ and our team can suggest alternatives.
Frequently Asked Questions
What input voltage range does the LM3431QMH support for LED driving?
The LM3431QMH supports an input voltage range of 4.5 V to 36 V, with a nominal operating point of 12 V, making it highly suitable for automotive 12 V bus systems as well as industrial equipment powered from wider-range AC-DC adapters.
How does the LM3431QMH achieve consistent brightness across multiple LED strings?
The LM3431QMH uses a 3-channel constant-current architecture with PWM current-mode control, ensuring each LED string receives precisely regulated current regardless of forward-voltage variation, which maintains uniform brightness across all 3 channels in display backlights and signage.
What package does the LM3431QMH use and how does it affect PCB design?
The LM3431QMH comes in a 28-pin Small Outline (R-PDSO-G28) package, providing a compact footprint suitable for space-constrained automotive dashboard and consumer display PCBs while offering enough pins for 3-channel current sensing and control feedback connections.
When is the LM3431QMH a good alternative to single-channel LED drivers?
The LM3431QMH is preferred over single-channel alternatives when a design requires driving 3 independent LED strings with matched currents from a single IC, reducing BOM count, board area, and component cost compared to using three separate single-channel drivers in automotive or industrial lighting applications.
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Why Buy from FindMyChip
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.
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