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Product Detailed Parameters
- Description：IC LED DRIVER RGLTR PWM 1A 8SOIC
- Series：-
- Mfr：Texas Instruments
- Package：Tube
- 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：1A
- Frequency：1MHz
- Dimming：PWM
- Applications：Lighting
- Operating Temperature：-40°C ~ 125°C (TJ)
- Mounting Type：Surface Mount
- Package / Case：8-SOIC (0.154", 3.90mm Width)
- Supplier Device Package：8-SOIC
- Grade：Automotive
- Qualification：-
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Overview
The LM3404MA/NOPB is a constant current buck LED driver IC from Texas Instruments, designed for high-power LED applications. It operates with an input voltage range of 6 V to 42 V and delivers a regulated output current of 1 A. The device supports a maximum output voltage of 40 V and features an adjustable switching frequency ranging from 10 kHz to 1 MHz. It includes integrated PWM dimming control for brightness adjustment. The component is housed in an 8-SOIC (0.209 inch) package and functions within a junction temperature range of -40°C to +125°C.
Feature Summary
- Integrates a 1 A constant current sink with internal power switch for simplified design
- Supports precise PWM dimming control for linear brightness adjustment without color shift
- Features adjustable switching frequency to optimize external component size and efficiency
- Includes thermal shutdown protection to safeguard the device under fault conditions
Applications
- General illumination lighting systems
- Automotive interior and exterior lighting modules
- Portable battery-powered LED flashlights
- Industrial task lighting fixtures
Procurement Notes
Verify the specific suffix 'MA' against the official Texas Instruments datasheet to confirm the exact package dimensions and tape/reel specifications. Ensure the ordering part number matches the required RoHS compliance status and manufacturing site. Cross-reference the active status on the manufacturer's website to avoid obsolete components. Confirm that the 8-SOIC footprint aligns with the target PCB layout requirements before finalizing procurement.
Selection Notes
Select this component when a single-channel, 1 A constant current solution is required for LEDs powered by voltages up to 42 V. It is suitable for designs prioritizing simplicity due to its integrated switch and minimal external component count. Consider the adjustable frequency range if EMI constraints or inductor size optimization are critical. Verify that the 40 V output voltage limit accommodates the forward voltage drop of the intended LED string configuration.
Part Context
The LM3404 series represents Texas Instruments' family of non-synchronous buck LED drivers. The LM3404MA variant specifically denotes the standard voltage version (up to 42 V input) in an SOIC-8 package. This distinguishes it from the LM3404HV series, which supports higher input voltages up to 75 V. The 'NOPB' suffix indicates lead-free packaging and compliance with environmental standards.
Replacement Considerations
Public confirmed substitute part numbers include LM3404M/NOPB and LM3404MRX/NOPB. These variants share identical electrical characteristics but differ in package type (MSOP vs. SOIC) or reel configuration. Ensure pinout compatibility and thermal performance match the existing design constraints when substituting.
