LM3424MHIn StockTexas Instruments
LM3424MH is a constant current N-channel MOSFET LED controller IC from Texas Instruments. It drives high-power LED strings with programmable current via external resistors, supporting wide input voltage range and thermal foldback protection. Ideal for automotive lighting, industrial LED drivers, and backlighting applications.
- Manufacturer
- Texas Instruments
- Package
- Small Outline Packages
- Pin Count
- 20
- Lifecycle
- OBSOLETE
- Datasheet
- LM3424MH 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
Key Features
- Constant current N-channel MOSFET gate driver optimized for high-power LED string control
- Programmable LED current set via external resistor divider for flexible design
- Thermal foldback protection reduces LED current automatically to prevent overtemperature
- Wide input voltage range supports automotive and industrial supply rails
- Small outline package with heat sink slug (TSSOP-20) enables compact thermal management
Applications
The LM3424MH is widely used in automotive exterior and interior LED lighting systems, including headlamps and daytime running lights, where robust thermal management and constant current control are critical. It is also applied in industrial LED driver modules, LED backlighting for displays, and general-purpose high-power LED fixtures requiring precise current regulation across varying supply voltages.
Specifications
| YTEOL | 0 |
| Interface IC Type | LED DISPLAY DRIVER |
| JESD-30 Code | R-PDSO-G20 |
| JESD-609 Code | e0 |
| Multiplexed Display Capability | NO |
| Number of Functions | 1 |
| Package Body Material | PLASTIC/EPOXY |
| Package Shape | RECTANGULAR |
| Package Style | SMALL OUTLINE, HEAT SINK/SLUG, THIN PROFILE, SHRINK PITCH |
| Qualification Status | Not Qualified |
| Supply Voltage-Max | 75V |
| Supply Voltage-Min | 4.5V |
| Supply Voltage-Nom | 14V |
| Surface Mount | YES |
| Temperature Grade | AUTOMOTIVE |
| Terminal Finish | TIN LEAD |
| Terminal Form | GULL WING |
| Terminal Pitch | 0.65mm |
| Terminal Position | DUAL |
| Package | Small Outline Packages |
Compliance & Regulatory
| RoHS Status | Compliant |
| Lead-Free | Yes (Pb-Free) |
| ECCN | EAR99 |
| HTS Code | 8542.39.00.60 |
Alternate & Equivalent Parts
Compatible alternatives and drop-in replacements for LM3424MH:
Frequently Asked Questions
What is the LM3424MH and what does it do?
The LM3424MH is a constant current N-channel MOSFET controller IC from Texas Instruments designed to regulate LED string current. It uses an external sense resistor and control loop to maintain stable LED current regardless of supply voltage variations, making it suitable for high-power LED driving applications.
What package does the LM3424MH come in?
The LM3424MH is housed in a 20-pin thin shrink small outline package (TSSOP-20) with an exposed heat sink slug on the underside. This package style enables efficient thermal dissipation, allowing the device to handle higher power dissipation in compact PCB designs.
What are typical applications for the LM3424MH?
Typical applications include automotive LED headlights and daytime running lights, industrial LED driver boards, LCD backlighting systems, and general high-brightness LED luminaires. Its thermal foldback feature and wide input voltage tolerance make it especially suitable for harsh automotive and industrial environments.
What alternative parts can replace the LM3424MH?
Compatible alternatives include the LM3424M (SOIC-20 package variant of the same device) and other N-channel LED controllers such as the LT3755 from Analog Devices or the MAX16833 from Maxim. When substituting, verify pin compatibility, input voltage range, and thermal performance requirements.
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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.
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