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Product Detailed Parameters
- Description：IC LED DRIVER CTRLR PWM 24WQFN
- Series：-
- Mfr：Texas Instruments
- Package：Tape & Reel (TR)
- Type：DC DC Controller
- Topology：Step-Down (Buck)
- Internal Switch(s)：No
- Number of Outputs：1
- Voltage - Supply (Min)：3V
- Voltage - Supply (Max)：5.8V
- Voltage - Output：-
- Current - Output / Channel：-
- Frequency：1MHz
- Dimming：PWM
- Applications：-
- Operating Temperature：-40°C ~ 125°C (TJ)
- Mounting Type：Surface Mount
- Package / Case：24-WFQFN Exposed Pad
- Supplier Device Package：24-WQFN (4x4)
- Grade：-
- Qualification：-
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Overview
The LM3434QX/NOPB is a Texas Instruments LED driver IC featuring a step-down (buck) topology. It supports an input voltage range of 5V to 36V and operates at switching frequencies up to 1MHz. The device provides PWM dimming control for precise light output adjustment. It is housed in a 24-WQFN (4x4) package and is qualified under AEC-Q100 standards for automotive applications.
Feature Summary
- Step-down (buck) DC-DC controller topology
- PWM dimming control capability
- AEC-Q100 automotive qualification
Applications
- Automotive LED lighting systems
- High-brightness LED drivers
- General illumination applications requiring precise current regulation
Procurement Notes
Verify the specific suffix 'QX' against the manufacturer's official datasheet to confirm package type and tape/reel specifications. Ensure the component meets AEC-Q100 requirements if used in automotive contexts. Cross-reference the part number with authorized distributors to avoid counterfeit products, as supply chain integrity is critical for qualified automotive components.
Selection Notes
Select this component when a buck topology is required for LED driving with high-frequency operation up to 1MHz. It is suitable for designs needing integrated PWM dimming without external logic. Consider the 24-WQFN package size for space-constrained PCB layouts. Verify thermal performance within the -40°C to +125°C operating range for the intended environment.
Part Context
This part belongs to the LM3434 family of LED drivers from Texas Instruments. It is designed specifically for high-efficiency constant current LED applications. The 'Q' designation indicates automotive qualification, while 'NOPB' signifies lead-free and RoHS compliance. It serves as a specialized solution for modern automotive lighting architectures.
Replacement Considerations
Direct substitutes may include other AEC-Q100 qualified buck LED drivers from Texas Instruments or competitors like Infineon and ON Semiconductor. Ensure replacement parts match the 24-WQFN footprint and support similar switching frequencies. Verify that alternative components offer comparable PWM dimming linearity and input voltage ranges.
