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Product Detailed Parameters
- Description：IC LED DRV RGLTR PWM 8VSSOP
- Series：-
- Mfr：Texas Instruments
- Package：Tape & Reel (TR)
- 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-TSSOP, 8-MSOP (0.118", 3.00mm Width)
- Supplier Device Package：8-VSSOP
- Grade：-
- Qualification：-
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Overview
The LM3402MMX is a constant current buck LED driver IC from Texas Instruments, designed for high-voltage applications. It features an integrated high-side N-channel MOSFET switch with a maximum supply voltage of 75V and an output voltage capability of 73V. The device regulates a constant output current of 500mA. It supports PWM dimming control and offers an adjustable switching frequency ranging from 10kHz to 1MHz. The component operates within a temperature range of -40°C to +125°C and is housed in an 8-VSSOP package.
Feature Summary
- Integrates a high-side N-channel MOSFET switch for compact design
- Provides precise constant current regulation for LED strings
- Supports external PWM dimming for brightness control
- Includes thermal shutdown protection for enhanced reliability
Applications
- Automotive lighting systems
- Industrial general lighting fixtures
- High-bay and street lighting applications
Procurement Notes
Verify the specific suffix (e.g., NOPB) against the required RoHS compliance status, as non-NOPB variants may not meet environmental standards. Confirm the package type matches the PCB footprint requirements. Ensure the input voltage range aligns with the system's power supply specifications before procurement.
Selection Notes
Select this component for applications requiring high input voltages up to 75V. Consider the 500mA output current limit when designing LED string configurations. Evaluate the need for PWM dimming capabilities versus analog methods. Check thermal performance requirements given the operating temperature range and power dissipation characteristics.
Part Context
This part belongs to the LM3402 family of constant current buck regulators. It is distinct from lower voltage variants like the LM3402MM which support up to 42V. The HV designation indicates its suitability for higher voltage automotive and industrial LED drivers compared to standard consumer electronics applications.
Replacement Considerations
The LM3402HVMM/NOPB is a direct replacement for the LM3402HVMM series. Verify pin compatibility and electrical specifications when substituting. Note that the base model LM3402HVMM is discontinued; ensure the replacement meets all functional and regulatory requirements.
