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Product Detailed Parameters
- Description：IC LED DRIVER CTRLR PWM 14HTSSOP
- Series：-
- Mfr：Texas Instruments
- Package：Tube
- Type：DC DC Controller
- Topology：SEPIC, Step-Down (Buck), Step-Up (Boost)
- Internal Switch(s)：No
- Number of Outputs：1
- Voltage - Supply (Min)：4.5V
- Voltage - Supply (Max)：75V
- Voltage - Output：-
- Current - Output / Channel：-
- Frequency：2MHz
- Dimming：Analog, PWM
- Applications：-
- Operating Temperature：-40°C ~ 125°C (TJ)
- Mounting Type：Surface Mount
- Package / Case：14-PowerTSSOP (0.173", 4.40mm Width)
- Supplier Device Package：14-HTSSOP
- Grade：Automotive
- Qualification：AEC-Q100
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Overview
The LM3429Q1MH/NOPB is an automotive-grade N-channel controller designed for constant current LED drivers. It supports Buck, Boost, and SEPIC topologies with a VIN range of 4.5 V to 75 V. The device offers an adjustable switching frequency from 100 kHz to 2 MHz and delivers up to 5 A output current. It operates within a temperature range of -40°C to +125°C and features analog and PWM dimming capabilities.
Feature Summary
- Automotive qualification compliant with AEC-Q100 standards for reliability in vehicle environments.
- Supports multiple converter topologies including Buck, Boost, and SEPIC for flexible LED driver designs.
- Enables precise brightness control through integrated analog and PWM dimming interfaces.
Applications
- Automotive exterior lighting systems
- Automotive interior ambient lighting
- High-power LED headlamp modules
Procurement Notes
Verify the specific suffix 'MH' corresponds to the HTSSOP-14 package variant required for your PCB layout. Confirm that the 'NOPB' designation ensures lead-free compliance and RoHS adherence as per Texas Instruments specifications. Ensure the design accounts for the automotive thermal operating range when selecting heat dissipation methods.
Selection Notes
Select this component when designing LED drivers for automotive applications requiring high input voltage tolerance up to 75 V. It is suitable for systems needing flexible topology options like Buck or Boost. Consider its 5 A current capability and wide frequency range for optimizing efficiency and EMI performance in space-constrained automotive enclosures.
Part Context
This part belongs to the LM3429 family of N-channel controllers specifically tailored for LED lighting. The Q1 suffix indicates it meets automotive quality standards, distinguishing it from commercial variants. It serves as a core control element in power management circuits for modern vehicle illumination systems.
Replacement Considerations
The LM3429MH/NOPB is a commercial-grade equivalent without automotive qualification. Verify if the application strictly requires AEC-Q100 certification before substituting. Other family members may offer different pinouts or current ratings; ensure electrical compatibility matches the existing design constraints.
