LM3407MY Texas Instruments Integrated Circuit (Small Outline Packages) In Stock
The LM3407MY is a constant-current buck LED driver IC from Texas Instruments in an 8-pin SOIC package. It drives high-brightness LEDs with programmable current up to 1A and operates from a 6V to 42V input supply. Available worldwide with in-stock shipping for lighting applications.
- Manufacturer
- Texas Instruments
- Package
- Small Outline Packages
- Pin Count
- 8
- Lifecycle
- OBSOLETE
- Datasheet
- LM3407MY 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 LM3407MY?
- Constant-current buck topology driving LEDs up to 1A with programmable current sense resistor
- Wide 6V to 42V input voltage range supporting automotive 12V and industrial 24V LED strings
- Fixed 520 kHz switching frequency minimizing inductor size and EMI in compact LED drivers
- Integrated MOSFET eliminating external switch for simplified single-IC LED driver designs
- PWM dimming input for flicker-free brightness control in display and lighting applications
What is LM3407MY used for?
The LM3407MY drives high-brightness LED strings in architectural and industrial lighting fixtures where a 12V to 42V bus supplies multiple series LEDs. Its constant-current regulation maintains consistent LED brightness and color temperature across input voltage variations in automotive interior lighting, signage, and machine vision illumination systems. The compact 8-pin SOIC footprint and integrated MOSFET make it a cost-effective single-chip solution for medium-power LED driver boards.
What are the specifications of LM3407MY?
| Pbfree Code | No |
| YTEOL | 0 |
| Interface IC Type | LED DISPLAY DRIVER |
| JESD-30 Code | S-PDSO-G8 |
| JESD-609 Code | e0 |
| Multiplexed Display Capability | NO |
| Number of Functions | 1 |
| Number of Segments | 7 |
| Package Body Material | PLASTIC/EPOXY |
| Package Shape | SQUARE |
| Package Style | SMALL OUTLINE, HEAT SINK/SLUG, THIN PROFILE, SHRINK PITCH |
| Qualification Status | Not Qualified |
| Supply Voltage-Max | 30V |
| Supply Voltage-Min | 4.5V |
| Supply Voltage-Nom | 12V |
| 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) |
| Moisture Sensitivity Level | MSL 1 |
| ECCN | EAR99 |
| HTS Code | 8542.39.00.60 |
Where can I find the LM3407MY datasheet?
LM3407MY Datasheet DownloadOfficial datasheet from Texas Instruments
What are equivalent replacements for LM3407MY?
Compatible alternatives and drop-in replacements for LM3407MY:
Frequently Asked Questions
What input voltage range does LM3407MY support and which LED string configurations does that enable?
The LM3407MY accepts a 6V to 42V input, making it suitable for driving 3 to 10 series LEDs from a 12V automotive rail or 24V industrial supply. At 42V input, a designer can stack more LEDs in series to improve efficiency by reducing the fraction of input power dissipated in the sense resistor compared to lower-voltage topologies.
How is the LED current programmed on LM3407MY and what is the maximum rated output current?
LED current is set by a sense resistor connected between the CS pin and ground; the LM3407MY regulates the voltage across this resistor to 200 mV typical. Selecting a 0.2 ohm resistor sets 1A output current, which is the maximum rated continuous current for the device. Tighter current accuracy requires low-tolerance 1% resistors to minimize LED brightness variation.
For a flicker-free architectural lighting design, how does LM3407MY implement brightness control?
LM3407MY includes a PWM dimming input that enables and disables LED current at a frequency set by the external controller, typically 200 Hz to 20 kHz. Dimming at 1 kHz with duty cycles from 1% to 99% avoids visible flicker above the 50 Hz human perception threshold while maintaining constant peak current at 1A during each on-phase, preserving color accuracy.
How does LM3407MY's 520 kHz switching frequency benefit a compact PCB layout?
The fixed 520 kHz switching frequency allows the use of a small 10 µH to 22 µH inductor, typically in a 2 x 2 mm package, versus the 100 µH inductors needed at 50 kHz. This reduces inductor footprint and height, enabling a total LED driver circuit area under 150 mm2 on a two-layer PCB while keeping ripple current below 30% of rated output.
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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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