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Product Detailed Parameters
- Description：IC LED DRV RGLTR PWM 8SOPWRPAD
- Series：-
- Mfr：Texas Instruments
- Package：Tape & Reel (TR),Cut Tape (CT)
- Type：DC DC Regulator
- Topology：Step-Down (Buck)
- Internal Switch(s)：Yes
- Number of Outputs：1
- Voltage - Supply (Min)：6V
- Voltage - Supply (Max)：42V
- Voltage - Output：40V
- Current - Output / Channel：500mA
- Frequency：1MHz
- Dimming：PWM
- Applications：Lighting
- Operating Temperature：-40°C ~ 125°C (TJ)
- Mounting Type：Surface Mount
- Package / Case：8-PowerSOIC (0.154", 3.90mm Width)
- Supplier Device Package：8-SO PowerPad
- Grade：-
- Qualification：-
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Overview
The LM3402MRX/NOPB is a constant current buck LED driver IC from Texas Instruments. It supports an input voltage range of 6 V to 42 V and delivers a regulated output current of 500 mA. The device operates with a switching frequency adjustable between 10 kHz and 1 MHz. It features PWM dimming control for brightness adjustment and includes thermal shutdown protection. The component is housed in an 8-SOIC (PowerPAD) package and functions within a junction temperature range of -40°C to +125°C.
Feature Summary
- Integrated internal high-side switch for simplified circuit design
- Precision constant current regulation for consistent LED brightness
- Supports analog and PWM dimming methods for flexible control
Applications
- General solid-state lighting applications
- LED backlighting systems
- Automotive interior lighting modules
Procurement Notes
Verify the specific suffix 'NOPB' confirms lead-free and RoHS compliance status as per the manufacturer's latest documentation. Confirm the 'MRX' designation corresponds to the tape-and-reel packaging format required for automated assembly processes. Cross-reference the full part number against the official Texas Instruments product selection guide to ensure availability and correct pinout configuration for the target application.
Selection Notes
Select this component when designing non-isolated buck converters requiring up to 500 mA drive current. Ensure the input supply voltage remains within the 6 V to 42 V operational window. Verify that the external inductor and sense resistor values align with the desired 500 mA output current setting. Consider the thermal performance of the PowerPAD package for heat dissipation requirements in enclosed environments.
Part Context
This part belongs to the LM3402 family of LED drivers, which are designed for high-efficiency constant current regulation. The series is widely used in commercial and industrial lighting solutions where precise current control and compact form factors are essential. The MRX variant specifically denotes the reel-packaged version of the standard SOIC-8 device.
Replacement Considerations
Direct substitutes include the LM3402MR/NOPB for tube packaging or the LM3402HV variants for higher input voltage applications exceeding 42 V. Verify pin compatibility and thermal characteristics before swapping.
