LM3421Q1MH/NOPB

$1.97

Description：IC LED DRIVER CTRLR PWM 16TSSOP
Series：-
Mfr：Texas Instruments
Package：Tube

SKU:d5ab4cd9fdb9 Category: LED Drivers IC Brand: Texas Instruments

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Product introduction

Product Detailed Parameters

Description：IC LED DRIVER CTRLR PWM 16TSSOP
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：3V ~ 72V
Current - Output / Channel：-
Frequency：2MHz
Dimming：Analog, PWM
Applications：-
Operating Temperature：-40°C ~ 125°C (TJ)
Mounting Type：Surface Mount
Package / Case：16-PowerTSSOP (0.173", 4.40mm Width)
Supplier Device Package：16-HTSSOP
Grade：Automotive
Qualification：AEC-Q100

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LM3421Q1MH/NOPB

Overview

The LM3421Q1MH/NOPB is an automotive-grade N-Channel controller designed for constant-current LED drivers. It supports Boost, Buck, and SEPIC topologies with a maximum output current of 5 A. The device operates from a supply voltage range of 4.5 V to 75 V, driving external MOSFETs to regulate LED strings within a 3 V to 72 V output voltage window. Switching frequency is adjustable between 100 kHz and 2 MHz. It functions reliably across a temperature range of -40°C to +125°C and includes analog and PWM dimming capabilities.

Feature Summary

Automotive qualification compliant with AEC-Q100 standards for high reliability in vehicle environments.
Supports versatile LED driver topologies including Boost, Buck, and SEPIC configurations.
Enables precise constant-current regulation through integrated error amplifier and sense resistor feedback.

Applications

Automotive exterior lighting systems
Automotive interior ambient lighting
High-power LED headlamp modules

Procurement Notes

Verify the specific suffix 'Q1' confirms AEC-Q100 automotive qualification status. Ensure the package marking matches the HTSSOP-16 form factor. Confirm RoHS compliance via the manufacturer's official documentation before integration into production designs.

Selection Notes

Select this component when designing LED drivers requiring automotive reliability ratings. It is suitable for applications needing flexible topology support such as Buck or Boost converters. Consider the 5 A current limit and 75 V input range when sizing external components for high-power LED arrays.

Part Context

This part belongs to the LM3421 series of N-Channel controllers for constant-current LED drivers. It is the automotive-qualified variant (indicated by Q1) of the standard LM3421 device. The series is manufactured by Texas Instruments and utilizes an HTSSOP-16 package for compact surface-mount implementation.