LM3421Q0MH/NOPB Texas Instruments Integrated Circuit (Small Outline Packages) In Stock
LM3421Q0MH/NOPB is an N-channel MOSFET controller for constant current LED driver applications by Texas Instruments in a 16-pin SOIC package. Key specs: single-channel LED current regulation, wide input voltage range for automotive and industrial LED strings, Pb-free AEC-Q100 qualified design. Available in stock with worldwide shipping.
- Manufacturer
- Texas Instruments
- Package
- Small Outline Packages
- Pin Count
- 16
- Lifecycle
- ACTIVE
- Datasheet
- LM3421Q0MH/NOPB Datasheet PDF
- Category
- Integrated Circuit
- Price
- From $3.0000(MOQ 5)
- Temp Range
- -40.0°C to 150.0°C
- RoHS
- Compliant
- Lead Time
- 3–7 business days
- Shipping
- DHL Express · Worldwide
What are the key features of LM3421Q0MH/NOPB?
- N-channel MOSFET gate drive architecture supports high-efficiency boost, buck, and SEPIC LED driver topologies, enabling design flexibility across a wide range of LED string voltages
- Automotive AEC-Q100 qualification and Pb-free construction allow direct use in vehicle interior and exterior lighting without additional component screening
- Constant current regulation loop maintains LED brightness independent of input voltage variations, ensuring consistent luminous output across battery discharge and load transient conditions
What is LM3421Q0MH/NOPB used for?
The LM3421Q0MH/NOPB is designed for automotive LED lighting applications including daytime running lights, interior ambient lighting, and rear combination lamp modules that require stable constant-current drive from a 12 V or 24 V vehicle bus. Its N-channel MOSFET control architecture and wide operating voltage range also make it suitable for industrial LED task lighting and commercial display backlights where high-efficiency constant current regulation must be maintained across varying input supply conditions.
What are the specifications of LM3421Q0MH/NOPB?
| Pbfree Code | Yes |
| YTEOL | 15 |
| Additional Feature | SEATED HGT-NOM |
| Input Characteristics | STANDARD |
| Interface IC Type | LED DISPLAY DRIVER |
| JESD-30 Code | R-PDSO-G16 |
| 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, THIN PROFILE, SHRINK PITCH |
| Peak Reflow Temperature (Cel) | 260 |
| 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 LM3421Q0MH/NOPB datasheet?
LM3421Q0MH/NOPB Datasheet DownloadOfficial datasheet from Texas Instruments
What are equivalent replacements for LM3421Q0MH/NOPB?
No known alternates. Submit an RFQ and our team can suggest alternatives.
Frequently Asked Questions
What LED driver topologies are supported by the LM3421Q0MH/NOPB controller?
The LM3421Q0MH/NOPB supports boost, buck, and SEPIC converter topologies by controlling an external N-channel power MOSFET. This flexibility allows the designer to configure the LED string voltage above, below, or equal to the input voltage—critical for automotive applications where the LED forward voltage at 6 LEDs in series (approximately 18 V to 24 V) may exceed or fall below the 12 V nominal vehicle supply.
Is the LM3421Q0MH/NOPB qualified for automotive LED lighting applications?
Yes, the LM3421Q0MH/NOPB carries AEC-Q100 automotive qualification and is Pb-free (NOPB suffix), meeting JEDEC JESD-609 code e3 solderability requirements. This makes it directly applicable to automotive exterior lighting such as daytime running lights (DRL) operating from a 9 V to 16 V vehicle battery bus over the -40°C to 125°C temperature range.
How does the constant current loop in the LM3421Q0MH/NOPB maintain LED brightness during input voltage transients?
The controller uses a feedback sense resistor placed in series with the LED string to monitor forward current, adjusting the MOSFET duty cycle cycle-by-cycle to keep LED current within ±3% of the set point. During a 12 V battery load dump event where voltage spikes to 40 V, the feedback loop reduces duty cycle within 1 µs to 2 µs, preventing LED over-current and protecting the string from thermal damage.
What package does the LM3421Q0MH/NOPB use, and how many external components are typically required?
The device comes in a 16-pin SOIC package. A typical boost LED driver circuit requires the LM3421Q0MH/NOPB plus approximately 8 to 12 external components: 1 external N-channel MOSFET, 1 inductor in the 10 µH to 100 µH range, 1 diode, 2 output capacitors, 1 current sense resistor, and a handful of resistors and capacitors for compensation and soft-start, making the complete LED driver BOM compact and cost-effective.
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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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