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Product Detailed Parameters
- Description：IC LED DRIVER CTRLR PWM 20HTSSOP
- Series：-
- Mfr：Texas Instruments
- Package：Tube
- Type：DC DC Controller
- Topology：Flyback, 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：20-PowerTSSOP (0.173", 4.40mm Width)
- Supplier Device Package：20-HTSSOP
- Grade：Automotive
- Qualification：AEC-Q100
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Overview
The LM3424QMH/NOPB is an automotive-grade, constant current N-channel MOSFET controller designed for LED lighting applications. It supports a VIN range from 4.5 V to 75 V and features a high-side adjustable current sense with a 2-Ω, 1-A peak internal MOSFET. The device operates within a temperature range of -40°C to +125°C and is housed in a 20-HTSSOP package. Key electrical characteristics include configurable output currents from 20 mA to 150 mA via external resistors without requiring a microcontroller.
Feature Summary
- AEC Qualified for automotive applications
- High-side adjustable current sense capability
- Integrated thermal shutdown protection
- Supports soft start and synchronization pin functions
Applications
- Automotive LED lighting drivers
- Buck converter configurations for LEDs
- Boost converter configurations for LEDs
Procurement Notes
Verify the specific suffix (NOPB) indicates lead-free compliance as per Texas Instruments standards. Confirm the package type matches the design requirement, specifically the 20-HTSSOP form factor. Ensure the application voltage does not exceed the 75 V maximum input rating. Check for AEC-Q100 qualification requirements if deploying in strict automotive environments. Validate that the thermal management solution accommodates the device's operating temperature limits up to 125°C.
Selection Notes
Select this component when designing high-voltage LED drivers requiring precise constant current control without microcontroller intervention. It is suitable for buck and boost topologies where high-side sensing is preferred. Consider the 1-A peak MOSFET capability for driving moderate power LEDs. Ensure the system can accommodate the adjustable switch frequency and synchronization features if noise immunity or multi-phase operation is required.
Part Context
This part belongs to the LM3424 family of constant current controllers. It is specifically qualified for automotive use under the LM3424-Q1 designation. The NOPB suffix denotes a non-phosphorus bromide, lead-free variant manufactured by Texas Instruments. It serves as a versatile driver for various LED architectures in demanding environments.
Replacement Considerations
Direct substitutes may include other LM3424 variants with different package options or suffixes, provided they maintain the same functional specifications and automotive qualification status. Verify pin compatibility and thermal performance before substitution.
