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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：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 LM3423Q1MH/NOPB is an N-channel controller for constant current LED drivers, designed for automotive applications. It supports Boost, Buck, and SEPIC topologies with a single output capable of up to 5 A. The device operates within an input voltage range of 4.5 V to 75 V and features an adjustable switching frequency from 100 kHz to 2 MHz. It offers analog and PWM dimming capabilities, thermal shutdown protection, and an enable/shutdown function. Packaged in a 20-HTSSOP, it functions reliably between -40°C and +125°C.
Feature Summary
- Supports multiple LED driver topologies including Boost, Buck, and SEPIC configurations.
- Provides integrated analog and pulse-width modulation (PWM) dimming control.
- Includes built-in thermal shutdown and enable/shutdown functionality for system protection.
Applications
- Automotive exterior lighting systems
- Automotive interior illumination circuits
- High-power LED driver designs requiring wide input voltage ranges
Procurement Notes
Verify the specific suffix 'Q1' confirms AEC-Q100 automotive qualification status. Confirm the 'MH' package code corresponds to the HTSSOP-20 variant. Ensure the '/NOPB' designation indicates lead-free and RoHS compliance as per manufacturer specifications before finalizing procurement orders.
Selection Notes
Select this component when designing LED drivers for automotive environments requiring high input voltage tolerance up to 75 V. It is suitable for applications needing flexible topology options like Buck or Boost. Consider its 5 A current capability and wide operating temperature range for robust performance in harsh conditions.
Part Context
This part belongs to the LM3423 family of LED lighting drivers manufactured by Texas Instruments. It is specifically qualified for automotive use under the Q1 designation. The family includes variants such as LM3423Q0 and non-automotive versions like LM3423MH, differing primarily in qualification standards and operational parameters.
Replacement Considerations
Direct substitutes include other LM3423 variants with matching automotive qualifications, such as LM3423Q1MHX/NOPB. Verify pin compatibility and electrical specifications against the original design requirements before substitution.
