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Product Detailed Parameters
- Description：IC LED DRVR CTRLR PWM 1A 8VSSOP
- Series：-
- Mfr：Texas Instruments
- Package：Tape & Reel (TR),Cut Tape (CT)
- Type：DC DC Controller
- Topology：Step-Down (Buck)
- Internal Switch(s)：No
- Number of Outputs：1
- Voltage - Supply (Min)：4.5V
- Voltage - Supply (Max)：35V
- Voltage - Output：-
- Current - Output / Channel：1A
- Frequency：1.5MHz
- Dimming：PWM
- Applications：-
- Operating Temperature：-40°C ~ 125°C (TJ)
- Mounting Type：Surface Mount
- Package / Case：8-TSSOP, 8-MSOP (0.118", 3.00mm Width)
- Supplier Device Package：8-VSSOP
- Grade：-
- Qualification：-
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Overview
The LM3401MMX/NOPB is a hysteretic P-FET controller designed for high-power LED drivers. It operates with an input voltage range of 4.5V to 35V and supports switching frequencies up to 1.5MHz. The device provides constant current regulation within ±6% accuracy using a low 200mV reference voltage. It features programmable current limiting, adjustable hysteresis, and a CMOS-compatible PWM dimming input. Packaged in an 8-pin VSSOP, it eliminates the need for output capacitors.
Feature Summary
- Hysteretic control architecture enables fast response and simplified design
- CMOS-compatible enable and PWM dimming inputs support high-frequency brightness adjustment
- Programmable current limit protects against overcurrent and short circuit faults
- Operates without output capacitors to reduce system complexity
Applications
- High-power LED lighting systems requiring constant current drive
- Automotive exterior lighting applications
- Industrial illumination fixtures
- General solid-state lighting designs
Procurement Notes
Verify the specific suffix MMX indicates tape and reel packaging when ordering. Confirm the NOPB designation ensures compliance with RoHS standards and absence of hazardous substances. Cross-reference the manufacturer datasheet for exact mechanical dimensions and moisture sensitivity levels prior to integration into manufacturing processes.
Selection Notes
Select this component for designs requiring simple hysteretic control without complex compensation networks. Ensure the external P-MOSFET selected can handle the required drain-source voltage and on-resistance for the target current. Verify that the application input voltage remains within the specified 4.5V to 35V operational window for reliable performance.
Part Context
This part belongs to the Texas Instruments LM3401 family of LED driver controllers. It is specifically engineered to drive external P-channel MOSFETs in buck converter topologies. The family focuses on providing precise current regulation for high-power LEDs while minimizing external component count through integrated hysteretic control mechanisms.
Replacement Considerations
Direct substitutes include the LM3401MM/NOPB which shares identical electrical specifications but differs in packaging format. Designers should verify pin compatibility and thermal characteristics when transitioning between package variants within the same functional family.
